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;
1938 if (GNUNET_YES == pos->connected)
1941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1942 "Marking address `%s' as no longer connected (due to connect on other address)\n",
1943 a2s (pos->ready_list->plugin->short_name,
1947 GNUNET_break (cnt == GNUNET_YES);
1949 pos->connected = GNUNET_NO;
1950 GNUNET_STATISTICS_update (stats,
1951 gettext_noop ("# connected addresses"),
1958 fal->connected = GNUNET_YES;
1959 if (GNUNET_YES == cnt)
1961 GNUNET_STATISTICS_update (stats,
1962 gettext_noop ("# connected addresses"),
1970 * Find an address in any of the available transports for
1971 * the given neighbour that would be good for message
1972 * transmission. This is essentially the transport selection
1975 * @param neighbour for whom to select an address
1976 * @return selected address, NULL if we have none
1978 struct ForeignAddressList *
1979 find_ready_address(struct NeighbourList *neighbour)
1981 struct ReadyList *head = neighbour->plugins;
1982 struct ForeignAddressList *addresses;
1983 struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
1984 struct ForeignAddressList *best_address;
1986 /* Hack to prefer unix domain sockets */
1987 struct ForeignAddressList *unix_address = NULL;
1989 best_address = NULL;
1990 while (head != NULL)
1992 addresses = head->addresses;
1993 while (addresses != NULL)
1995 if ( (addresses->timeout.abs_value < now.abs_value) &&
1996 (addresses->connected == GNUNET_YES) )
1999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2000 "Marking long-time inactive connection to `%4s' as down.\n",
2001 GNUNET_i2s (&neighbour->id));
2003 GNUNET_STATISTICS_update (stats,
2004 gettext_noop ("# connected addresses"),
2007 addresses->connected = GNUNET_NO;
2009 addresses = addresses->next;
2012 addresses = head->addresses;
2013 while (addresses != NULL)
2016 if (addresses->addr != NULL)
2017 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2018 "Have address `%s' for peer `%4s' (status: %d, %d, %d, %u, %llums, %u)\n",
2019 a2s (head->plugin->short_name,
2021 addresses->addrlen),
2022 GNUNET_i2s (&neighbour->id),
2023 addresses->connected,
2024 addresses->in_transmit,
2025 addresses->validated,
2026 addresses->connect_attempts,
2027 (unsigned long long) addresses->timeout.abs_value,
2028 (unsigned int) addresses->distance);
2030 if (0==strcmp(head->plugin->short_name,"unix"))
2032 if ( (unix_address == NULL) ||
2033 ( (unix_address != NULL) &&
2034 (addresses->latency.rel_value < unix_address->latency.rel_value) ) )
2035 unix_address = addresses;
2037 if ( ( (best_address == NULL) ||
2038 (addresses->connected == GNUNET_YES) ||
2039 (best_address->connected == GNUNET_NO) ) &&
2040 (addresses->in_transmit == GNUNET_NO) &&
2041 ( (best_address == NULL) ||
2042 (addresses->latency.rel_value < best_address->latency.rel_value)) )
2043 best_address = addresses;
2044 /* FIXME: also give lower-latency addresses that are not
2045 connected a chance some times... */
2046 addresses = addresses->next;
2048 if (unix_address != NULL)
2052 if (unix_address != NULL)
2054 best_address = unix_address;
2056 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2057 "Found UNIX address, forced this address\n");
2060 if (best_address != NULL)
2063 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2064 "Best address found (`%s') has latency of %llu ms.\n",
2065 (best_address->addrlen > 0)
2066 ? a2s (best_address->ready_list->plugin->short_name,
2068 best_address->addrlen)
2070 best_address->latency.rel_value);
2075 GNUNET_STATISTICS_update (stats,
2076 gettext_noop ("# transmission attempts failed (no address)"),
2081 return best_address;
2088 struct GeneratorContext
2090 struct TransportPlugin *plug_pos;
2091 struct OwnAddressList *addr_pos;
2092 struct GNUNET_TIME_Absolute expiration;
2100 address_generator (void *cls, size_t max, void *buf)
2102 struct GeneratorContext *gc = cls;
2105 while ((gc->addr_pos == NULL) && (gc->plug_pos != NULL))
2107 gc->plug_pos = gc->plug_pos->next;
2108 gc->addr_pos = (gc->plug_pos != NULL) ? gc->plug_pos->addresses : NULL;
2110 if (NULL == gc->plug_pos)
2115 ret = GNUNET_HELLO_add_address (gc->plug_pos->short_name,
2118 gc->addr_pos->addrlen, buf, max);
2119 gc->addr_pos = gc->addr_pos->next;
2125 * Construct our HELLO message from all of the addresses of
2126 * all of the transports.
2129 * @param tc scheduler context
2132 refresh_hello_task (void *cls,
2133 const struct GNUNET_SCHEDULER_TaskContext *tc)
2135 struct GNUNET_HELLO_Message *hello;
2136 struct TransportClient *cpos;
2137 struct NeighbourList *npos;
2138 struct GeneratorContext gc;
2140 hello_task = GNUNET_SCHEDULER_NO_TASK;
2141 gc.plug_pos = plugins;
2142 gc.addr_pos = plugins != NULL ? plugins->addresses : NULL;
2143 gc.expiration = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
2144 hello = GNUNET_HELLO_create (&my_public_key, &address_generator, &gc);
2146 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2147 "Refreshed my `%s', new size is %d\n", "HELLO", GNUNET_HELLO_size(hello));
2149 GNUNET_STATISTICS_update (stats,
2150 gettext_noop ("# refreshed my HELLO"),
2154 while (cpos != NULL)
2156 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2157 "Transmitting my HELLO to client!\n");
2158 transmit_to_client (cpos,
2159 (const struct GNUNET_MessageHeader *) hello,
2164 GNUNET_free_non_null (our_hello);
2166 GNUNET_PEERINFO_add_peer (peerinfo, our_hello);
2167 for (npos = neighbours; npos != NULL; npos = npos->next)
2169 if (! npos->received_pong)
2172 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2173 "Transmitting updated `%s' to neighbour `%4s'\n",
2174 "HELLO", GNUNET_i2s (&npos->id));
2176 GNUNET_STATISTICS_update (stats,
2177 gettext_noop ("# transmitted my HELLO to other peers"),
2180 transmit_to_peer (NULL, NULL, 0,
2181 HELLO_ADDRESS_EXPIRATION,
2182 (const char *) our_hello,
2183 GNUNET_HELLO_size(our_hello),
2190 * Schedule task to refresh hello (unless such a
2191 * task exists already).
2196 #if DEBUG_TRANSPORT_HELLO
2197 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2198 "refresh_hello() called!\n");
2200 if (hello_task != GNUNET_SCHEDULER_NO_TASK)
2203 = GNUNET_SCHEDULER_add_now (&refresh_hello_task,
2209 * Iterator over hash map entries that NULLs the session of validation
2210 * entries that match the given session.
2212 * @param cls closure (the 'struct Session*' to match against)
2213 * @param key current key code (peer ID, not used)
2214 * @param value value in the hash map ('struct ValidationEntry*')
2215 * @return GNUNET_YES (we should continue to iterate)
2218 remove_session_validations (void *cls,
2219 const GNUNET_HashCode * key,
2222 struct Session *session = cls;
2223 struct ValidationEntry *ve = value;
2225 if (session == ve->session)
2232 * We've been disconnected from the other peer (for some
2233 * connection-oriented transport). Either quickly
2234 * re-establish the connection or signal the disconnect
2237 * Only signal CORE level disconnect if ALL addresses
2238 * for the peer are exhausted.
2240 * @param p overall plugin context
2241 * @param nl neighbour that was disconnected
2244 try_fast_reconnect (struct TransportPlugin *p,
2245 struct NeighbourList *nl)
2247 /* FIXME-MW: fast reconnect / transport switching not implemented... */
2248 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2249 "try_fast_reconnect not implemented!\n");
2250 /* Note: the idea here is to hide problems with transports (or
2251 switching between plugins) from the core to eliminate the need to
2252 re-negotiate session keys and the like; OTOH, we should tell core
2253 quickly (much faster than timeout) `if a connection was lost and
2254 could not be re-established (i.e. other peer went down or is
2255 unable / refuses to communicate);
2257 So we should consider:
2258 1) ideally: our own willingness / need to connect
2259 2) prior failures to connect to this peer (by plugin)
2260 3) ideally: reasons why other peer terminated (as far as knowable)
2262 Most importantly, it must be POSSIBLE for another peer to terminate
2263 a connection for a while (without us instantly re-establishing it).
2264 Similarly, if another peer is gone we should quickly notify CORE.
2265 OTOH, if there was a minor glitch (i.e. crash of gnunet-service-transport
2266 on the other end), we should reconnect in such a way that BOTH CORE
2267 services never even notice.
2268 Furthermore, the same mechanism (or small variation) could be used
2269 to switch to a better-performing plugin (ATS).
2271 Finally, this needs to be tested throughly... */
2274 * GNUNET_NO in the call below makes transport disconnect the peer,
2275 * even if only a single address (out of say, six) went away. This
2276 * function must be careful to ONLY disconnect if the peer is gone,
2277 * not just a specific address.
2279 * More specifically, half the places it was used had it WRONG.
2282 /* No reconnect, signal disconnect instead! */
2285 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2286 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&nl->id),
2287 "try_fast_reconnect");
2289 GNUNET_STATISTICS_update (stats,
2290 gettext_noop ("# disconnects due to try_fast_reconnect"),
2294 disconnect_neighbour (nl, GNUNET_YES);
2300 * Function that will be called whenever the plugin internally
2301 * cleans up a session pointer and hence the service needs to
2302 * discard all of those sessions as well. Plugins that do not
2303 * use sessions can simply omit calling this function and always
2304 * use NULL wherever a session pointer is needed.
2306 * @param cls closure
2307 * @param peer which peer was the session for
2308 * @param session which session is being destoyed
2311 plugin_env_session_end (void *cls,
2312 const struct GNUNET_PeerIdentity *peer,
2313 struct Session *session)
2315 struct TransportPlugin *p = cls;
2316 struct NeighbourList *nl;
2317 struct ReadyList *rl;
2318 struct ForeignAddressList *pos;
2319 struct ForeignAddressList *prev;
2322 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2323 "Session ended with peer `%4s', %s\n",
2325 "plugin_env_session_end");
2327 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
2328 &remove_session_validations,
2330 nl = find_neighbour (peer);
2334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2335 "No neighbour record found for peer `%4s'\n",
2338 return; /* was never marked as connected */
2343 if (rl->plugin == p)
2350 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2351 "Plugin was associated with peer `%4s'\n",
2354 GNUNET_STATISTICS_update (stats,
2355 gettext_noop ("# disconnects due to session end"),
2358 disconnect_neighbour (nl, GNUNET_YES);
2362 pos = rl->addresses;
2363 while ( (pos != NULL) &&
2364 (pos->session != session) )
2372 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2373 "Session was never marked as ready for peer `%4s'\n",
2377 int validations_pending = GNUNET_CONTAINER_multihashmap_contains (validation_map, &peer->hashPubKey);
2379 /* No session was marked as ready, but we have pending validations so do not disconnect from neighbour */
2380 if (validations_pending ==GNUNET_YES)
2383 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2384 "Not disconnecting from peer `%4s due to pending address validations\n", GNUNET_i2s(peer));
2389 //FIXME: This conflicts with inbound tcp connections and tcp nat ... debugging in progress
2390 GNUNET_STATISTICS_update (stats,
2391 gettext_noop ("# disconnects due to unready session"),
2395 disconnect_neighbour (nl, GNUNET_YES);
2396 return; /* was never marked as connected */
2398 pos->session = NULL;
2399 pos->connected = GNUNET_NO;
2400 if (pos->addrlen != 0)
2402 if (nl->received_pong != GNUNET_NO)
2404 GNUNET_STATISTICS_update (stats,
2405 gettext_noop ("# try_fast_reconnect thanks to plugin_env_session_end"),
2408 if (GNUNET_YES == pos->connected)
2409 try_fast_reconnect (p, nl);
2413 GNUNET_STATISTICS_update (stats,
2414 gettext_noop ("# disconnects due to missing pong"),
2417 /* FIXME this is never true?! See: line 2416*/
2418 if (GNUNET_YES == pos->connected)
2419 disconnect_neighbour (nl, GNUNET_YES);
2424 GNUNET_STATISTICS_update (stats,
2425 gettext_noop ("# connected addresses"),
2429 /* was inbound connection, free 'pos' */
2431 rl->addresses = pos->next;
2433 prev->next = pos->next;
2434 if (GNUNET_SCHEDULER_NO_TASK != pos->revalidate_task)
2436 GNUNET_SCHEDULER_cancel (pos->revalidate_task);
2437 pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
2439 GNUNET_free_non_null(pos->ressources);
2440 GNUNET_free_non_null(pos->quality);
2441 ats_modify_problem_state (ats, ATS_MODIFIED);
2443 if (GNUNET_YES != pos->connected)
2445 /* nothing else to do, connection was never up... */
2451 if (nl->received_pong == GNUNET_NO)
2453 GNUNET_STATISTICS_update (stats,
2454 gettext_noop ("# disconnects due to NO pong"),
2457 disconnect_neighbour (nl, GNUNET_YES);
2458 return; /* nothing to do, never connected... */
2460 /* check if we have any validated addresses left */
2461 pos = rl->addresses;
2464 if (GNUNET_YES == pos->validated)
2466 GNUNET_STATISTICS_update (stats,
2467 gettext_noop ("# try_fast_reconnect thanks to validated_address"),
2470 try_fast_reconnect (p, nl);
2475 /* no valid addresses left, signal disconnect! */
2478 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2479 "Disconnecting peer `%4s', %s\n",
2481 "plugin_env_session_end");
2483 /* FIXME: This doesn't mean there are no addresses left for this PEER,
2484 * it means there aren't any left for this PLUGIN/PEER combination! So
2485 * calling disconnect_neighbour here with GNUNET_NO forces disconnect
2486 * when it isn't necessary. Using GNUNET_YES at least checks to see
2487 * if there are any addresses that work first, so as not to overdo it.
2490 GNUNET_STATISTICS_update (stats,
2491 gettext_noop ("# disconnects due to plugin_env_session_end"),
2494 disconnect_neighbour (nl, GNUNET_YES);
2499 * Function that must be called by each plugin to notify the
2500 * transport service about the addresses under which the transport
2501 * provided by the plugin can be reached.
2503 * @param cls closure
2504 * @param add_remove GNUNET_YES to add, GNUNET_NO to remove the address
2505 * @param addr one of the addresses of the host, NULL for the last address
2506 * the specific address format depends on the transport
2507 * @param addrlen length of the address
2510 plugin_env_notify_address (void *cls,
2515 struct TransportPlugin *p = cls;
2516 struct OwnAddressList *al;
2517 struct OwnAddressList *prev;
2519 GNUNET_assert (p->api != NULL);
2521 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2522 (add_remove == GNUNET_YES)
2523 ? "Adding `%s':%s to the set of our addresses\n"
2524 : "Removing `%s':%s from the set of our addresses\n",
2529 GNUNET_assert (addr != NULL);
2530 if (GNUNET_NO == add_remove)
2536 if ( (addrlen == al->addrlen) &&
2537 (0 == memcmp (addr, &al[1], addrlen)) )
2540 p->addresses = al->next;
2542 prev->next = al->next;
2553 al = GNUNET_malloc (sizeof (struct OwnAddressList) + addrlen);
2554 al->next = p->addresses;
2556 al->addrlen = addrlen;
2557 memcpy (&al[1], addr, addrlen);
2563 * Notify all of our clients about a peer connecting.
2566 notify_clients_connect (const struct GNUNET_PeerIdentity *peer,
2567 struct GNUNET_TIME_Relative latency,
2570 struct ConnectInfoMessage * cim;
2571 struct TransportClient *cpos;
2575 if (0 == memcmp (peer,
2577 sizeof (struct GNUNET_PeerIdentity)))
2583 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2584 "Notifying clients about connection with `%s'\n",
2587 GNUNET_STATISTICS_update (stats,
2588 gettext_noop ("# peers connected"),
2593 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
2594 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
2598 cim = GNUNET_malloc (size);
2599 cim->header.size = htons (size);
2600 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
2601 cim->ats_count = htonl(2);
2602 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
2603 (&(cim->ats))[0].value = htonl (distance);
2604 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
2605 (&(cim->ats))[1].value = htonl ((uint32_t) latency.rel_value);
2606 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
2607 (&(cim->ats))[2].value = htonl (0);
2608 memcpy (&cim->id, peer, sizeof (struct GNUNET_PeerIdentity));
2610 /* notify ats about connecting peer */
2611 /* notify ats about connecting peer */
2612 if ((ats != NULL) && (shutdown_in_progress == GNUNET_NO))
2614 ats_modify_problem_state(ats, ATS_MODIFIED);
2615 ats_calculate_bandwidth_distribution (ats, stats);
2620 while (cpos != NULL)
2622 transmit_to_client (cpos, &(cim->header), GNUNET_NO);
2631 * Notify all of our clients about a peer disconnecting.
2634 notify_clients_disconnect (const struct GNUNET_PeerIdentity *peer)
2636 struct DisconnectInfoMessage dim;
2637 struct TransportClient *cpos;
2639 if (0 == memcmp (peer,
2641 sizeof (struct GNUNET_PeerIdentity)))
2647 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2648 "Notifying clients about lost connection to `%s'\n",
2651 GNUNET_STATISTICS_update (stats,
2652 gettext_noop ("# peers connected"),
2655 dim.header.size = htons (sizeof (struct DisconnectInfoMessage));
2656 dim.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
2657 dim.reserved = htonl (0);
2658 memcpy (&dim.peer, peer, sizeof (struct GNUNET_PeerIdentity));
2660 /* notify ats about connecting peer */
2661 if ((ats != NULL) && (shutdown_in_progress == GNUNET_NO))
2663 ats_modify_problem_state(ats, ATS_MODIFIED);
2664 ats_calculate_bandwidth_distribution (ats, stats);
2668 while (cpos != NULL)
2670 transmit_to_client (cpos, &dim.header, GNUNET_NO);
2677 * Find a ForeignAddressList entry for the given neighbour
2678 * that matches the given address and transport.
2680 * @param neighbour which peer we care about
2681 * @param tname name of the transport plugin
2682 * @param session session to look for, NULL for 'any'; otherwise
2683 * can be used for the service to "learn" this session ID
2685 * @param addr binary address
2686 * @param addrlen length of addr
2687 * @return NULL if no such entry exists
2689 static struct ForeignAddressList *
2690 find_peer_address(struct NeighbourList *neighbour,
2692 struct Session *session,
2696 struct ReadyList *head;
2697 struct ForeignAddressList *pos;
2699 head = neighbour->plugins;
2700 while (head != NULL)
2702 if (0 == strcmp (tname, head->plugin->short_name))
2708 pos = head->addresses;
2709 while ( (pos != NULL) &&
2710 ( (pos->addrlen != addrlen) ||
2711 (memcmp(pos->addr, addr, addrlen) != 0) ) )
2713 if ( (session != NULL) &&
2714 (pos->session == session) )
2718 if ( (session != NULL) && (pos != NULL) )
2719 pos->session = session; /* learn it! */
2725 * Get the peer address struct for the given neighbour and
2726 * address. If it doesn't yet exist, create it.
2728 * @param neighbour which peer we care about
2729 * @param tname name of the transport plugin
2730 * @param session session of the plugin, or NULL for none
2731 * @param addr binary address
2732 * @param addrlen length of addr
2733 * @return NULL if we do not have a transport plugin for 'tname'
2735 static struct ForeignAddressList *
2736 add_peer_address (struct NeighbourList *neighbour,
2738 struct Session *session,
2742 struct ReadyList *head;
2743 struct ForeignAddressList *ret;
2746 ret = find_peer_address (neighbour, tname, session, addr, addrlen);
2749 head = neighbour->plugins;
2751 while (head != NULL)
2753 if (0 == strcmp (tname, head->plugin->short_name))
2759 ret = GNUNET_malloc(sizeof(struct ForeignAddressList) + addrlen);
2760 ret->session = session;
2761 if ((addrlen > 0) && (addr != NULL))
2763 ret->addr = (const char*) &ret[1];
2764 memcpy (&ret[1], addr, addrlen);
2771 ret->ressources = GNUNET_malloc(available_ressources * sizeof (struct ATS_ressource_entry));
2772 for (c=0; c<available_ressources; c++)
2774 struct ATS_ressource_entry *r = ret->ressources;
2776 r[c].atis_index = ressources[c].atis_index;
2777 if (0 == strcmp(neighbour->plugins->plugin->short_name,"unix"))
2779 r[c].c = ressources[c].c_unix;
2781 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"udp"))
2783 r[c].c = ressources[c].c_udp;
2785 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"tcp"))
2787 r[c].c = ressources[c].c_tcp;
2789 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"http"))
2791 r[c].c = ressources[c].c_http;
2793 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"https"))
2795 r[c].c = ressources[c].c_https;
2797 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"wlan"))
2799 r[c].c = ressources[c].c_wlan;
2803 r[c].c = ressources[c].c_default;
2804 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2805 "Assigning default cost to peer `%s' addr plugin `%s'! This should not happen!\n",
2806 GNUNET_i2s(&neighbour->id),
2807 neighbour->plugins->plugin->short_name);
2811 ret->quality = GNUNET_malloc (available_quality_metrics * sizeof (struct ATS_quality_entry));
2812 ret->addrlen = addrlen;
2813 ret->expires = GNUNET_TIME_relative_to_absolute
2814 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2815 ret->latency = GNUNET_TIME_relative_get_forever();
2817 ret->timeout = GNUNET_TIME_relative_to_absolute
2818 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2819 ret->ready_list = head;
2820 ret->next = head->addresses;
2821 head->addresses = ret;
2827 * Closure for 'add_validated_address'.
2829 struct AddValidatedAddressContext
2832 * Entry that has been validated.
2834 const struct ValidationEntry *ve;
2837 * Flag set after we have added the address so
2838 * that we terminate the iteration next time.
2845 * Callback function used to fill a buffer of max bytes with a list of
2846 * addresses in the format used by HELLOs. Should use
2847 * "GNUNET_HELLO_add_address" as a helper function.
2849 * @param cls the 'struct AddValidatedAddressContext' with the validated address
2850 * @param max maximum number of bytes that can be written to buf
2851 * @param buf where to write the address information
2852 * @return number of bytes written, 0 to signal the
2853 * end of the iteration.
2856 add_validated_address (void *cls,
2857 size_t max, void *buf)
2859 struct AddValidatedAddressContext *avac = cls;
2860 const struct ValidationEntry *ve = avac->ve;
2862 if (GNUNET_YES == avac->done)
2864 avac->done = GNUNET_YES;
2865 return GNUNET_HELLO_add_address (ve->transport_name,
2866 GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION),
2876 * Closure for 'check_address_exists'.
2878 struct CheckAddressExistsClosure
2881 * Address to check for.
2886 * Name of the transport.
2893 struct Session *session;
2896 * Set to GNUNET_YES if the address exists.
2909 * Iterator over hash map entries. Checks if the given
2910 * validation entry is for the same address as what is given
2913 * @param cls the 'struct CheckAddressExistsClosure*'
2914 * @param key current key code (ignored)
2915 * @param value value in the hash map ('struct ValidationEntry')
2916 * @return GNUNET_YES if we should continue to
2917 * iterate (mismatch), GNUNET_NO if not (entry matched)
2920 check_address_exists (void *cls,
2921 const GNUNET_HashCode * key,
2924 struct CheckAddressExistsClosure *caec = cls;
2925 struct ValidationEntry *ve = value;
2927 if ( (0 == strcmp (caec->tname,
2928 ve->transport_name)) &&
2929 (caec->addrlen == ve->addrlen) &&
2930 (0 == memcmp (caec->addr,
2934 caec->exists = GNUNET_YES;
2937 if ( (ve->session != NULL) &&
2938 (caec->session == ve->session) )
2940 caec->exists = GNUNET_YES;
2948 neighbour_timeout_task (void *cls,
2949 const struct GNUNET_SCHEDULER_TaskContext *tc)
2951 struct NeighbourList *n = cls;
2954 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2955 "Neighbour `%4s' has timed out!\n", GNUNET_i2s (&n->id));
2957 GNUNET_STATISTICS_update (stats,
2958 gettext_noop ("# disconnects due to timeout"),
2961 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2962 disconnect_neighbour (n, GNUNET_NO);
2967 * Schedule the job that will cause us to send a PING to the
2968 * foreign address to evaluate its validity and latency.
2970 * @param fal address to PING
2973 schedule_next_ping (struct ForeignAddressList *fal);
2977 * Add the given address to the list of foreign addresses
2978 * available for the given peer (check for duplicates).
2980 * @param cls the respective 'struct NeighbourList' to update
2981 * @param tname name of the transport
2982 * @param expiration expiration time
2983 * @param addr the address
2984 * @param addrlen length of the address
2985 * @return GNUNET_OK (always)
2988 add_to_foreign_address_list (void *cls,
2990 struct GNUNET_TIME_Absolute expiration,
2994 struct NeighbourList *n = cls;
2995 struct ForeignAddressList *fal;
2998 GNUNET_STATISTICS_update (stats,
2999 gettext_noop ("# valid peer addresses returned by PEERINFO"),
3003 fal = find_peer_address (n, tname, NULL, addr, addrlen);
3006 #if DEBUG_TRANSPORT_HELLO
3007 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3008 "Adding address `%s' (%s) for peer `%4s' due to PEERINFO data for %llums.\n",
3009 a2s (tname, addr, addrlen),
3011 GNUNET_i2s (&n->id),
3012 expiration.abs_value);
3014 fal = add_peer_address (n, tname, NULL, addr, addrlen);
3017 GNUNET_STATISTICS_update (stats,
3018 gettext_noop ("# previously validated addresses lacking transport"),
3024 fal->expires = GNUNET_TIME_absolute_max (expiration,
3026 schedule_next_ping (fal);
3032 fal->expires = GNUNET_TIME_absolute_max (expiration,
3038 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3039 "Failed to add new address for `%4s'\n",
3040 GNUNET_i2s (&n->id));
3044 if (fal->validated == GNUNET_NO)
3046 fal->validated = GNUNET_YES;
3047 GNUNET_STATISTICS_update (stats,
3048 gettext_noop ("# peer addresses considered valid"),
3052 if (try == GNUNET_YES)
3055 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3056 "Have new addresses, will try to trigger transmissions.\n");
3058 try_transmission_to_peer (n);
3065 * Add addresses in validated HELLO "h" to the set of addresses
3066 * we have for this peer.
3068 * @param cls closure ('struct NeighbourList*')
3069 * @param peer id of the peer, NULL for last call
3070 * @param h hello message for the peer (can be NULL)
3071 * @param err_msg NULL if successful, otherwise contains error message
3074 add_hello_for_peer (void *cls,
3075 const struct GNUNET_PeerIdentity *peer,
3076 const struct GNUNET_HELLO_Message *h,
3077 const char *err_msg)
3079 struct NeighbourList *n = cls;
3081 if (err_msg != NULL)
3084 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3085 _("Error in communication with PEERINFO service: %s\n"),
3092 GNUNET_STATISTICS_update (stats,
3093 gettext_noop ("# outstanding peerinfo iterate requests"),
3100 return; /* no HELLO available */
3102 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3103 "Peerinfo had `%s' message for peer `%4s', adding existing addresses.\n",
3107 if (GNUNET_YES != n->public_key_valid)
3109 GNUNET_HELLO_get_key (h, &n->publicKey);
3110 n->public_key_valid = GNUNET_YES;
3112 GNUNET_HELLO_iterate_addresses (h,
3114 &add_to_foreign_address_list,
3120 * Create a fresh entry in our neighbour list for the given peer.
3121 * Will try to transmit our current HELLO to the new neighbour.
3122 * Do not call this function directly, use 'setup_peer_check_blacklist.
3124 * @param peer the peer for which we create the entry
3125 * @param do_hello should we schedule transmitting a HELLO
3126 * @return the new neighbour list entry
3128 static struct NeighbourList *
3129 setup_new_neighbour (const struct GNUNET_PeerIdentity *peer,
3132 struct NeighbourList *n;
3133 struct TransportPlugin *tp;
3134 struct ReadyList *rl;
3136 GNUNET_assert (0 != memcmp (peer,
3138 sizeof (struct GNUNET_PeerIdentity)));
3140 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3141 "Setting up state for neighbour `%4s'\n",
3144 GNUNET_STATISTICS_update (stats,
3145 gettext_noop ("# active neighbours"),
3148 n = GNUNET_malloc (sizeof (struct NeighbourList));
3149 n->next = neighbours;
3153 GNUNET_TIME_relative_to_absolute
3154 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
3155 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
3156 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
3157 MAX_BANDWIDTH_CARRY_S);
3161 if ((tp->api->send != NULL) && (!is_blacklisted(peer, tp)))
3163 rl = GNUNET_malloc (sizeof (struct ReadyList));
3165 rl->next = n->plugins;
3168 rl->addresses = NULL;
3172 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
3174 n->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
3175 &neighbour_timeout_task, n);
3178 GNUNET_STATISTICS_update (stats,
3179 gettext_noop ("# peerinfo new neighbor iterate requests"),
3182 GNUNET_STATISTICS_update (stats,
3183 gettext_noop ("# outstanding peerinfo iterate requests"),
3186 n->piter = GNUNET_PEERINFO_iterate (peerinfo, peer,
3187 GNUNET_TIME_UNIT_FOREVER_REL,
3188 &add_hello_for_peer, n);
3190 GNUNET_STATISTICS_update (stats,
3191 gettext_noop ("# HELLO's sent to new neighbors"),
3194 if (NULL != our_hello)
3195 transmit_to_peer (NULL, NULL, 0,
3196 HELLO_ADDRESS_EXPIRATION,
3197 (const char *) our_hello, GNUNET_HELLO_size(our_hello),
3205 * Function called after we have checked if communicating
3206 * with a given peer is acceptable.
3208 * @param cls closure
3209 * @param n NULL if communication is not acceptable
3211 typedef void (*SetupContinuation)(void *cls,
3212 struct NeighbourList *n);
3216 * Information kept for each client registered to perform
3222 * This is a linked list.
3224 struct Blacklisters *next;
3227 * This is a linked list.
3229 struct Blacklisters *prev;
3232 * Client responsible for this entry.
3234 struct GNUNET_SERVER_Client *client;
3237 * Blacklist check that we're currently performing.
3239 struct BlacklistCheck *bc;
3245 * Head of DLL of blacklisting clients.
3247 static struct Blacklisters *bl_head;
3250 * Tail of DLL of blacklisting clients.
3252 static struct Blacklisters *bl_tail;
3256 * Context we use when performing a blacklist check.
3258 struct BlacklistCheck
3262 * This is a linked list.
3264 struct BlacklistCheck *next;
3267 * This is a linked list.
3269 struct BlacklistCheck *prev;
3272 * Peer being checked.
3274 struct GNUNET_PeerIdentity peer;
3277 * Option for setup neighbour afterwards.
3282 * Continuation to call with the result.
3284 SetupContinuation cont;
3292 * Current transmission request handle for this client, or NULL if no
3293 * request is pending.
3295 struct GNUNET_CONNECTION_TransmitHandle *th;
3298 * Our current position in the blacklisters list.
3300 struct Blacklisters *bl_pos;
3303 * Current task performing the check.
3305 GNUNET_SCHEDULER_TaskIdentifier task;
3310 * Head of DLL of active blacklisting queries.
3312 static struct BlacklistCheck *bc_head;
3315 * Tail of DLL of active blacklisting queries.
3317 static struct BlacklistCheck *bc_tail;
3321 * Perform next action in the blacklist check.
3323 * @param cls the 'struct BlacklistCheck*'
3327 do_blacklist_check (void *cls,
3328 const struct GNUNET_SCHEDULER_TaskContext *tc);
3331 * Transmit blacklist query to the client.
3333 * @param cls the 'struct BlacklistCheck'
3334 * @param size number of bytes allowed
3335 * @param buf where to copy the message
3336 * @return number of bytes copied to buf
3339 transmit_blacklist_message (void *cls,
3343 struct BlacklistCheck *bc = cls;
3344 struct Blacklisters *bl;
3345 struct BlacklistMessage bm;
3350 GNUNET_assert (bc->task == GNUNET_SCHEDULER_NO_TASK);
3351 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3353 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3354 "Failed to send blacklist test for peer `%s' to client\n",
3355 GNUNET_i2s (&bc->peer));
3359 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3360 "Sending blacklist test for peer `%s' to client\n",
3361 GNUNET_i2s (&bc->peer));
3364 bm.header.size = htons (sizeof (struct BlacklistMessage));
3365 bm.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_QUERY);
3366 bm.is_allowed = htonl (0);
3368 memcpy (buf, &bm, sizeof (bm));
3369 GNUNET_SERVER_receive_done (bl->client, GNUNET_OK);
3375 * Perform next action in the blacklist check.
3377 * @param cls the 'struct BlacklistCheck*'
3381 do_blacklist_check (void *cls,
3382 const struct GNUNET_SCHEDULER_TaskContext *tc)
3384 struct BlacklistCheck *bc = cls;
3385 struct Blacklisters *bl;
3387 bc->task = GNUNET_SCHEDULER_NO_TASK;
3392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3393 "No blacklist clients active, will now setup neighbour record for peer `%s'\n",
3394 GNUNET_i2s (&bc->peer));
3396 bc->cont (bc->cont_cls,
3397 setup_new_neighbour (&bc->peer, bc->do_hello));
3404 bc->th = GNUNET_SERVER_notify_transmit_ready (bl->client,
3405 sizeof (struct BlacklistMessage),
3406 GNUNET_TIME_UNIT_FOREVER_REL,
3407 &transmit_blacklist_message,
3414 * Obtain a 'struct NeighbourList' for the given peer. If such an entry
3415 * does not yet exist, check the blacklist. If the blacklist says creating
3416 * one is acceptable, create one and call the continuation; otherwise
3417 * call the continuation with NULL.
3419 * @param peer peer to setup or look up a struct NeighbourList for
3420 * @param do_hello should we also schedule sending our HELLO to the peer
3421 * if this is a new record
3422 * @param cont function to call with the 'struct NeigbhbourList*'
3423 * @param cont_cls closure for cont
3426 setup_peer_check_blacklist (const struct GNUNET_PeerIdentity *peer,
3428 SetupContinuation cont,
3431 struct NeighbourList *n;
3432 struct BlacklistCheck *bc;
3434 n = find_neighbour(peer);
3438 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3439 "Neighbour record exists for peer `%s'\n",
3446 if (bl_head == NULL)
3449 cont (cont_cls, setup_new_neighbour (peer, do_hello));
3451 setup_new_neighbour(peer, do_hello);
3454 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3455 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3457 bc->do_hello = do_hello;
3459 bc->cont_cls = cont_cls;
3460 bc->bl_pos = bl_head;
3461 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3467 * Function called with the result of querying a new blacklister about
3468 * it being allowed (or not) to continue to talk to an existing neighbour.
3470 * @param cls the original 'struct NeighbourList'
3471 * @param n NULL if we need to disconnect
3474 confirm_or_drop_neighbour (void *cls,
3475 struct NeighbourList *n)
3477 struct NeighbourList * orig = cls;
3482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3483 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&orig->id),
3484 "confirm_or_drop_neighboUr");
3486 GNUNET_STATISTICS_update (stats,
3487 gettext_noop ("# disconnects due to blacklist"),
3490 disconnect_neighbour (orig, GNUNET_NO);
3496 * Handle a request to start a blacklist.
3498 * @param cls closure (always NULL)
3499 * @param client identification of the client
3500 * @param message the actual message
3503 handle_blacklist_init (void *cls,
3504 struct GNUNET_SERVER_Client *client,
3505 const struct GNUNET_MessageHeader *message)
3507 struct Blacklisters *bl;
3508 struct BlacklistCheck *bc;
3509 struct NeighbourList *n;
3514 if (bl->client == client)
3517 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3522 bl = GNUNET_malloc (sizeof (struct Blacklisters));
3523 bl->client = client;
3524 GNUNET_SERVER_client_keep (client);
3525 GNUNET_CONTAINER_DLL_insert_after (bl_head, bl_tail, bl_tail, bl);
3526 /* confirm that all existing connections are OK! */
3530 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3531 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3533 bc->do_hello = GNUNET_NO;
3534 bc->cont = &confirm_or_drop_neighbour;
3537 if (n == neighbours) /* all would wait for the same client, no need to
3538 create more than just the first task right now */
3539 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3547 * Handle a request to blacklist a peer.
3549 * @param cls closure (always NULL)
3550 * @param client identification of the client
3551 * @param message the actual message
3554 handle_blacklist_reply (void *cls,
3555 struct GNUNET_SERVER_Client *client,
3556 const struct GNUNET_MessageHeader *message)
3558 const struct BlacklistMessage *msg = (const struct BlacklistMessage*) message;
3559 struct Blacklisters *bl;
3560 struct BlacklistCheck *bc;
3563 while ( (bl != NULL) &&
3564 (bl->client != client) )
3569 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3570 "Blacklist client disconnected\n");
3572 /* FIXME: other error handling here!? */
3573 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3578 if (ntohl (msg->is_allowed) == GNUNET_SYSERR)
3581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3582 "Blacklist check failed, peer not allowed\n");
3584 bc->cont (bc->cont_cls, NULL);
3585 GNUNET_CONTAINER_DLL_remove (bc_head, bc_tail, bc);
3591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3592 "Blacklist check succeeded, continuing with checks\n");
3594 bc->bl_pos = bc->bl_pos->next;
3595 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3598 /* check if any other bc's are waiting for this blacklister */
3602 if ( (bc->bl_pos == bl) &&
3603 (GNUNET_SCHEDULER_NO_TASK == bc->task) )
3604 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3612 * Send periodic PING messages to a given foreign address.
3614 * @param cls our 'struct PeriodicValidationContext*'
3615 * @param tc task context
3618 send_periodic_ping (void *cls,
3619 const struct GNUNET_SCHEDULER_TaskContext *tc)
3621 struct ForeignAddressList *peer_address = cls;
3622 struct TransportPlugin *tp;
3623 struct ValidationEntry *va;
3624 struct NeighbourList *neighbour;
3625 struct TransportPingMessage ping;
3626 struct CheckAddressExistsClosure caec;
3628 uint16_t hello_size;
3632 peer_address->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
3633 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3635 tp = peer_address->ready_list->plugin;
3636 neighbour = peer_address->ready_list->neighbour;
3637 if (GNUNET_YES != neighbour->public_key_valid)
3639 /* no public key yet, try again later */
3640 schedule_next_ping (peer_address);
3643 caec.addr = peer_address->addr;
3644 caec.addrlen = peer_address->addrlen;
3645 caec.tname = tp->short_name;
3646 caec.session = peer_address->session;
3647 caec.exists = GNUNET_NO;
3649 /* Inbound address, we won't have in validation map! */
3650 if (0 == peer_address->addrlen)
3651 fprintf(stderr, "Sending periodic ping to inbound address!??\n");
3653 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
3654 &check_address_exists,
3656 if (caec.exists == GNUNET_YES)
3658 /* During validation attempts we will likely trigger the other
3659 peer trying to validate our address which in turn will cause
3660 it to send us its HELLO, so we expect to hit this case rather
3661 frequently. Only print something if we are very verbose. */
3662 #if DEBUG_TRANSPORT > 1
3663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3664 "Some validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
3665 (peer_address->addr != NULL)
3666 ? a2s (tp->short_name,
3668 peer_address->addrlen)
3671 GNUNET_i2s (&neighbour->id));
3673 schedule_next_ping (peer_address);
3676 va = GNUNET_malloc (sizeof (struct ValidationEntry) + peer_address->addrlen);
3677 va->transport_name = GNUNET_strdup (tp->short_name);
3678 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
3680 va->send_time = GNUNET_TIME_absolute_get();
3681 va->session = peer_address->session;
3682 if (peer_address->addr != NULL)
3684 va->addr = (const void*) &va[1];
3685 memcpy (&va[1], peer_address->addr, peer_address->addrlen);
3686 va->addrlen = peer_address->addrlen;
3688 memcpy(&va->publicKey,
3689 &neighbour->publicKey,
3690 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
3692 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
3693 &timeout_hello_validation,
3695 GNUNET_CONTAINER_multihashmap_put (validation_map,
3696 &neighbour->id.hashPubKey,
3698 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3700 if (peer_address->validated != GNUNET_YES)
3701 hello_size = GNUNET_HELLO_size(our_hello);
3705 tsize = sizeof(struct TransportPingMessage) + hello_size;
3707 if (peer_address->addr != NULL)
3709 slen = strlen (tp->short_name) + 1;
3710 tsize += slen + peer_address->addrlen;
3714 slen = 0; /* make gcc happy */
3716 message_buf = GNUNET_malloc(tsize);
3717 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
3718 ping.challenge = htonl(va->challenge);
3719 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
3720 if (peer_address->validated != GNUNET_YES)
3722 memcpy(message_buf, our_hello, hello_size);
3725 if (peer_address->addr != NULL)
3727 ping.header.size = htons(sizeof(struct TransportPingMessage) +
3728 peer_address->addrlen +
3730 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
3733 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
3735 peer_address->addrlen);
3739 ping.header.size = htons(sizeof(struct TransportPingMessage));
3742 memcpy(&message_buf[hello_size],
3744 sizeof(struct TransportPingMessage));
3746 #if DEBUG_TRANSPORT_REVALIDATION
3747 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3748 "Performing re-validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s'\n",
3749 (peer_address->addr != NULL)
3750 ? a2s (peer_address->plugin->short_name,
3752 peer_address->addrlen)
3755 GNUNET_i2s (&neighbour->id),
3756 "HELLO", hello_size,
3759 if (peer_address->validated != GNUNET_YES)
3760 GNUNET_STATISTICS_update (stats,
3761 gettext_noop ("# PING with HELLO messages sent"),
3765 GNUNET_STATISTICS_update (stats,
3766 gettext_noop ("# PING without HELLO messages sent"),
3769 GNUNET_STATISTICS_update (stats,
3770 gettext_noop ("# PING messages sent for re-validation"),
3773 transmit_to_peer (NULL, peer_address,
3774 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
3775 HELLO_VERIFICATION_TIMEOUT,
3777 GNUNET_YES, neighbour);
3778 GNUNET_free(message_buf);
3779 schedule_next_ping (peer_address);
3784 * Schedule the job that will cause us to send a PING to the
3785 * foreign address to evaluate its validity and latency.
3787 * @param fal address to PING
3790 schedule_next_ping (struct ForeignAddressList *fal)
3792 struct GNUNET_TIME_Relative delay;
3794 if (fal->revalidate_task != GNUNET_SCHEDULER_NO_TASK)
3796 GNUNET_SCHEDULER_cancel(fal->revalidate_task);
3797 fal->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
3799 delay = GNUNET_TIME_absolute_get_remaining (fal->expires);
3800 delay.rel_value /= 2; /* do before expiration */
3801 delay = GNUNET_TIME_relative_min (delay,
3802 LATENCY_EVALUATION_MAX_DELAY);
3803 if (GNUNET_YES != fal->estimated)
3805 delay = GNUNET_TIME_UNIT_ZERO;
3806 fal->estimated = GNUNET_YES;
3809 if (GNUNET_YES == fal->connected)
3811 delay = GNUNET_TIME_relative_min (delay,
3812 CONNECTED_LATENCY_EVALUATION_MAX_DELAY);
3814 /* FIXME: also adjust delay based on how close the last
3815 observed latency is to the latency of the best alternative */
3816 /* bound how fast we can go */
3817 delay = GNUNET_TIME_relative_max (delay,
3818 GNUNET_TIME_UNIT_SECONDS);
3819 /* randomize a bit (to avoid doing all at the same time) */
3820 delay.rel_value += GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1000);
3821 fal->revalidate_task = GNUNET_SCHEDULER_add_delayed(delay,
3822 &send_periodic_ping,
3830 * Function that will be called if we receive some payload
3831 * from another peer.
3833 * @param message the payload
3834 * @param n peer who claimed to be the sender
3837 handle_payload_message (const struct GNUNET_MessageHeader *message,
3838 struct NeighbourList *n)
3840 struct InboundMessage *im;
3841 struct TransportClient *cpos;
3844 msize = ntohs (message->size);
3845 if (n->received_pong == GNUNET_NO)
3848 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3849 "Received message of type %u and size %u from `%4s', but no pong yet!\n",
3850 ntohs (message->type),
3851 ntohs (message->size),
3852 GNUNET_i2s (&n->id));
3854 GNUNET_free_non_null (n->pre_connect_message_buffer);
3855 n->pre_connect_message_buffer = GNUNET_malloc (msize);
3856 memcpy (n->pre_connect_message_buffer, message, msize);
3861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3862 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
3863 ntohs (message->type),
3864 ntohs (message->size),
3865 GNUNET_i2s (&n->id));
3867 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3870 n->quota_violation_count++;
3872 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3873 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
3874 n->in_tracker.available_bytes_per_s__,
3875 n->quota_violation_count);
3877 /* Discount 32k per violation */
3878 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3883 if (n->quota_violation_count > 0)
3885 /* try to add 32k back */
3886 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3888 n->quota_violation_count--;
3891 GNUNET_STATISTICS_update (stats,
3892 gettext_noop ("# payload received from other peers"),
3895 /* transmit message to all clients */
3896 uint32_t ats_count = 2;
3897 size_t size = sizeof (struct InboundMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information) + msize;
3898 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
3901 im = GNUNET_malloc (size);
3902 im->header.size = htons (size);
3903 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
3905 im->ats_count = htonl(ats_count);
3906 /* Setting ATS data */
3907 (&(im->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
3908 (&(im->ats))[0].value = htonl (n->distance);
3909 (&(im->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
3910 (&(im->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
3911 (&(im->ats))[ats_count].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
3912 (&(im->ats))[ats_count].value = htonl (0);
3914 memcpy (&((&(im->ats))[ats_count+1]), message, msize);
3916 while (cpos != NULL)
3918 transmit_to_client (cpos, &im->header, GNUNET_YES);
3926 * Iterator over hash map entries. Checks if the given validation
3927 * entry is for the same challenge as what is given in the PONG.
3929 * @param cls the 'struct TransportPongMessage*'
3930 * @param key peer identity
3931 * @param value value in the hash map ('struct ValidationEntry')
3932 * @return GNUNET_YES if we should continue to
3933 * iterate (mismatch), GNUNET_NO if not (entry matched)
3936 check_pending_validation (void *cls,
3937 const GNUNET_HashCode * key,
3940 const struct TransportPongMessage *pong = cls;
3941 struct ValidationEntry *ve = value;
3942 struct AddValidatedAddressContext avac;
3943 unsigned int challenge = ntohl(pong->challenge);
3944 struct GNUNET_HELLO_Message *hello;
3945 struct GNUNET_PeerIdentity target;
3946 struct NeighbourList *n;
3947 struct ForeignAddressList *fal;
3948 struct OwnAddressList *oal;
3949 struct TransportPlugin *tp;
3950 struct GNUNET_MessageHeader *prem;
3956 ps = ntohs (pong->header.size);
3957 if (ps < sizeof (struct TransportPongMessage))
3959 GNUNET_break_op (0);
3962 addr = (const char*) &pong[1];
3963 slen = strlen (ve->transport_name) + 1;
3964 if ( (ps - sizeof (struct TransportPongMessage) < slen) ||
3965 (ve->challenge != challenge) ||
3966 (addr[slen-1] != '\0') ||
3967 (0 != strcmp (addr, ve->transport_name)) ||
3968 (ntohl (pong->purpose.size)
3969 != sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
3971 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
3972 sizeof (struct GNUNET_PeerIdentity) + ps - sizeof (struct TransportPongMessage)) )
3977 alen = ps - sizeof (struct TransportPongMessage) - slen;
3978 switch (ntohl (pong->purpose.purpose))
3980 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN:
3981 if ( (ve->addrlen + slen != ntohl (pong->addrlen)) ||
3982 (0 != memcmp (&addr[slen],
3986 return GNUNET_YES; /* different entry, keep trying! */
3988 if (0 != memcmp (&pong->pid,
3990 sizeof (struct GNUNET_PeerIdentity)))
3992 GNUNET_break_op (0);
3996 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN,
4001 GNUNET_break_op (0);
4006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4007 "Confirmed validity of address, peer `%4s' has address `%s' (%s).\n",
4009 a2s (ve->transport_name,
4010 (const struct sockaddr *) ve->addr,
4012 ve->transport_name);
4015 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING:
4016 if (0 != memcmp (&pong->pid,
4018 sizeof (struct GNUNET_PeerIdentity)))
4022 GNUNET_asprintf(&peer, "%s",GNUNET_i2s (&pong->pid));
4024 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4025 "Received PONG for different identity: I am `%s', PONG identity: `%s'\n",
4026 GNUNET_i2s (&my_identity),
4032 if (ve->addrlen != 0)
4034 /* must have been for a different validation entry */
4037 tp = find_transport (ve->transport_name);
4043 oal = tp->addresses;
4046 if ( (oal->addrlen == alen) &&
4047 (0 == memcmp (&oal[1],
4055 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4056 _("Not accepting PONG from `%s' with address `%s' since I cannot confirm using this address.\n"),
4057 GNUNET_i2s (&pong->pid),
4058 a2s (ve->transport_name,
4061 /* FIXME: since the sender of the PONG currently uses the
4062 wrong address (see FIMXE there!), we cannot run a
4063 proper check here... */
4069 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING,
4074 GNUNET_break_op (0);
4079 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4080 "Confirmed that peer `%4s' is talking to us using address `%s' (%s) for us.\n",
4082 a2s (ve->transport_name,
4085 ve->transport_name);
4089 GNUNET_break_op (0);
4092 if (GNUNET_TIME_absolute_get_remaining (GNUNET_TIME_absolute_ntoh (pong->expiration)).rel_value == 0)
4094 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4095 _("Received expired signature. Check system time.\n"));
4098 GNUNET_STATISTICS_update (stats,
4099 gettext_noop ("# address validation successes"),
4102 /* create the updated HELLO */
4103 GNUNET_CRYPTO_hash (&ve->publicKey,
4104 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4105 &target.hashPubKey);
4106 if (ve->addr != NULL)
4108 avac.done = GNUNET_NO;
4110 hello = GNUNET_HELLO_create (&ve->publicKey,
4111 &add_validated_address,
4113 GNUNET_PEERINFO_add_peer (peerinfo,
4115 GNUNET_free (hello);
4117 n = find_neighbour (&target);
4120 n->publicKey = ve->publicKey;
4121 n->public_key_valid = GNUNET_YES;
4122 fal = add_peer_address (n,
4127 GNUNET_assert (fal != NULL);
4128 fal->expires = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
4129 fal->validated = GNUNET_YES;
4130 mark_address_connected (fal);
4131 GNUNET_STATISTICS_update (stats,
4132 gettext_noop ("# peer addresses considered valid"),
4135 fal->latency = GNUNET_TIME_absolute_get_duration (ve->send_time);
4136 update_addr_value (fal, GNUNET_TIME_absolute_get_duration (ve->send_time).rel_value, GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4138 schedule_next_ping (fal);
4139 if (n->latency.rel_value == GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
4140 n->latency = fal->latency;
4142 n->latency.rel_value = (fal->latency.rel_value + n->latency.rel_value) / 2;
4144 n->distance = fal->distance;
4145 if (GNUNET_NO == n->received_pong)
4147 n->received_pong = GNUNET_YES;
4148 notify_clients_connect (&target, n->latency, n->distance);
4149 if (NULL != (prem = n->pre_connect_message_buffer))
4151 n->pre_connect_message_buffer = NULL;
4152 handle_payload_message (prem, n);
4156 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4158 GNUNET_SCHEDULER_cancel (n->retry_task);
4159 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4160 try_transmission_to_peer (n);
4164 /* clean up validation entry */
4165 GNUNET_assert (GNUNET_YES ==
4166 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4169 abort_validation (NULL, NULL, ve);
4175 * Function that will be called if we receive a validation
4176 * of an address challenge that we transmitted to another
4177 * peer. Note that the validation should only be considered
4178 * acceptable if the challenge matches AND if the sender
4179 * address is at least a plausible address for this peer
4180 * (otherwise we may be seeing a MiM attack).
4182 * @param cls closure
4183 * @param message the pong message
4184 * @param peer who responded to our challenge
4185 * @param sender_address string describing our sender address (as observed
4186 * by the other peer in binary format)
4187 * @param sender_address_len number of bytes in 'sender_address'
4190 handle_pong (void *cls, const struct GNUNET_MessageHeader *message,
4191 const struct GNUNET_PeerIdentity *peer,
4192 const char *sender_address,
4193 size_t sender_address_len)
4195 if (0 == memcmp (peer,
4197 sizeof (struct GNUNET_PeerIdentity)))
4199 /* PONG send to self, ignore */
4200 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4201 "Receiving `%s' message from myself\n",
4205 #if DEBUG_TRANSPORT > 1
4206 /* we get tons of these that just get discarded, only log
4207 if we are quite verbose */
4208 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4209 "Receiving `%s' message from `%4s'.\n", "PONG",
4212 GNUNET_STATISTICS_update (stats,
4213 gettext_noop ("# PONG messages received"),
4216 if (GNUNET_SYSERR !=
4217 GNUNET_CONTAINER_multihashmap_get_multiple (validation_map,
4219 &check_pending_validation,
4222 /* This is *expected* to happen a lot since we send
4223 PONGs to *all* known addresses of the sender of
4224 the PING, so most likely we get multiple PONGs
4225 per PING, and all but the first PONG will end up
4226 here. So really we should not print anything here
4227 unless we want to be very, very verbose... */
4228 #if DEBUG_TRANSPORT > 2
4229 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4230 "Received `%s' message from `%4s' but have no record of a matching `%s' message. Ignoring.\n",
4242 * Try to validate a neighbour's address by sending him our HELLO and a PING.
4244 * @param cls the 'struct ValidationEntry*'
4245 * @param neighbour neighbour to validate, NULL if validation failed
4248 transmit_hello_and_ping (void *cls,
4249 struct NeighbourList *neighbour)
4251 struct ValidationEntry *va = cls;
4252 struct ForeignAddressList *peer_address;
4253 struct TransportPingMessage ping;
4254 uint16_t hello_size;
4257 struct GNUNET_PeerIdentity id;
4260 GNUNET_CRYPTO_hash (&va->publicKey,
4261 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4263 if (neighbour == NULL)
4265 /* FIXME: stats... */
4266 GNUNET_break (GNUNET_OK ==
4267 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4270 abort_validation (NULL, NULL, va);
4273 neighbour->publicKey = va->publicKey;
4274 neighbour->public_key_valid = GNUNET_YES;
4275 peer_address = add_peer_address (neighbour,
4276 va->transport_name, NULL,
4277 (const void*) &va[1],
4279 if (peer_address == NULL)
4281 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4282 "Failed to add peer `%4s' for plugin `%s'\n",
4283 GNUNET_i2s (&neighbour->id),
4284 va->transport_name);
4285 GNUNET_break (GNUNET_OK ==
4286 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4289 abort_validation (NULL, NULL, va);
4292 if (NULL == our_hello)
4293 refresh_hello_task (NULL, NULL);
4294 hello_size = GNUNET_HELLO_size(our_hello);
4295 slen = strlen(va->transport_name) + 1;
4296 tsize = sizeof(struct TransportPingMessage) + hello_size + va->addrlen + slen;
4297 message_buf = GNUNET_malloc(tsize);
4298 ping.challenge = htonl(va->challenge);
4299 ping.header.size = htons(sizeof(struct TransportPingMessage) + slen + va->addrlen);
4300 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
4301 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
4302 memcpy(message_buf, our_hello, hello_size);
4303 memcpy(&message_buf[hello_size],
4305 sizeof(struct TransportPingMessage));
4306 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
4309 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
4313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4314 "Performing validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s' (%u bytes)\n",
4317 : a2s (va->transport_name,
4318 (const void*) &va[1], va->addrlen),
4320 GNUNET_i2s (&neighbour->id),
4321 "HELLO", hello_size,
4322 "PING", sizeof (struct TransportPingMessage) + va->addrlen + slen);
4325 GNUNET_STATISTICS_update (stats,
4326 gettext_noop ("# PING messages sent for initial validation"),
4329 transmit_to_peer (NULL, peer_address,
4330 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
4331 HELLO_VERIFICATION_TIMEOUT,
4333 GNUNET_YES, neighbour);
4334 GNUNET_free(message_buf);
4339 * Check if the given address is already being validated; if not,
4340 * append the given address to the list of entries that are being be
4341 * validated and initiate validation.
4343 * @param cls closure ('struct CheckHelloValidatedContext *')
4344 * @param tname name of the transport
4345 * @param expiration expiration time
4346 * @param addr the address
4347 * @param addrlen length of the address
4348 * @return GNUNET_OK (always)
4351 run_validation (void *cls,
4353 struct GNUNET_TIME_Absolute expiration,
4357 struct CheckHelloValidatedContext *chvc = cls;
4358 struct GNUNET_PeerIdentity id;
4359 struct TransportPlugin *tp;
4360 struct ValidationEntry *va;
4361 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4362 struct CheckAddressExistsClosure caec;
4363 struct OwnAddressList *oal;
4365 GNUNET_assert (addr != NULL);
4367 GNUNET_STATISTICS_update (stats,
4368 gettext_noop ("# peer addresses scheduled for validation"),
4371 tp = find_transport (tname);
4374 GNUNET_log (GNUNET_ERROR_TYPE_INFO |
4375 GNUNET_ERROR_TYPE_BULK,
4377 ("Transport `%s' not loaded, will not try to validate peer address using this transport.\n"),
4379 GNUNET_STATISTICS_update (stats,
4380 gettext_noop ("# peer addresses not validated (plugin not available)"),
4385 /* check if this is one of our own addresses */
4386 oal = tp->addresses;
4389 if ( (oal->addrlen == addrlen) &&
4390 (0 == memcmp (&oal[1],
4394 /* not plausible, this address is equivalent to our own address! */
4395 GNUNET_STATISTICS_update (stats,
4396 gettext_noop ("# peer addresses not validated (loopback)"),
4403 GNUNET_HELLO_get_key (chvc->hello, &pk);
4404 GNUNET_CRYPTO_hash (&pk,
4406 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4409 if (is_blacklisted(&id, tp))
4412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4413 "Attempted to validate blacklisted peer `%s' using `%s'!\n",
4421 caec.addrlen = addrlen;
4422 caec.session = NULL;
4424 caec.exists = GNUNET_NO;
4425 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
4426 &check_address_exists,
4428 if (caec.exists == GNUNET_YES)
4430 /* During validation attempts we will likely trigger the other
4431 peer trying to validate our address which in turn will cause
4432 it to send us its HELLO, so we expect to hit this case rather
4433 frequently. Only print something if we are very verbose. */
4434 #if DEBUG_TRANSPORT > 1
4435 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4436 "Validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
4437 a2s (tname, addr, addrlen),
4441 GNUNET_STATISTICS_update (stats,
4442 gettext_noop ("# peer addresses not validated (in progress)"),
4447 va = GNUNET_malloc (sizeof (struct ValidationEntry) + addrlen);
4450 va->transport_name = GNUNET_strdup (tname);
4451 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
4453 va->send_time = GNUNET_TIME_absolute_get();
4454 va->addr = (const void*) &va[1];
4455 memcpy (&va[1], addr, addrlen);
4456 va->addrlen = addrlen;
4457 GNUNET_HELLO_get_key (chvc->hello,
4459 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
4460 &timeout_hello_validation,
4462 GNUNET_CONTAINER_multihashmap_put (validation_map,
4465 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4466 setup_peer_check_blacklist (&id, GNUNET_NO,
4467 &transmit_hello_and_ping,
4474 * Check if addresses in validated hello "h" overlap with
4475 * those in "chvc->hello" and validate the rest.
4477 * @param cls closure
4478 * @param peer id of the peer, NULL for last call
4479 * @param h hello message for the peer (can be NULL)
4480 * @param err_msg NULL if successful, otherwise contains error message
4483 check_hello_validated (void *cls,
4484 const struct GNUNET_PeerIdentity *peer,
4485 const struct GNUNET_HELLO_Message *h,
4486 const char *err_msg)
4488 struct CheckHelloValidatedContext *chvc = cls;
4489 struct GNUNET_HELLO_Message *plain_hello;
4490 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4491 struct GNUNET_PeerIdentity target;
4492 struct NeighbourList *n;
4494 if (err_msg != NULL)
4497 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4498 _("Error in communication with PEERINFO service: %s\n"),
4506 GNUNET_STATISTICS_update (stats,
4507 gettext_noop ("# outstanding peerinfo iterate requests"),
4511 if (GNUNET_NO == chvc->hello_known)
4513 /* notify PEERINFO about the peer now, so that we at least
4514 have the public key if some other component needs it */
4515 GNUNET_HELLO_get_key (chvc->hello, &pk);
4516 GNUNET_CRYPTO_hash (&pk,
4517 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4518 &target.hashPubKey);
4519 plain_hello = GNUNET_HELLO_create (&pk,
4522 GNUNET_PEERINFO_add_peer (peerinfo, plain_hello);
4523 GNUNET_free (plain_hello);
4524 #if DEBUG_TRANSPORT_HELLO
4525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4526 "PEERINFO had no `%s' message for peer `%4s', full validation needed.\n",
4528 GNUNET_i2s (&target));
4530 GNUNET_STATISTICS_update (stats,
4531 gettext_noop ("# new HELLOs requiring full validation"),
4534 GNUNET_HELLO_iterate_addresses (chvc->hello,
4541 GNUNET_STATISTICS_update (stats,
4542 gettext_noop ("# duplicate HELLO (peer known)"),
4547 if (chvc->ve_count == 0)
4549 GNUNET_CONTAINER_DLL_remove (chvc_head,
4558 #if DEBUG_TRANSPORT_HELLO
4559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4560 "PEERINFO had `%s' message for peer `%4s', validating only new addresses.\n",
4564 chvc->hello_known = GNUNET_YES;
4565 n = find_neighbour (peer);
4568 #if DEBUG_TRANSPORT_HELLO
4569 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4570 "Calling hello_iterate_addresses for %s!\n",
4573 GNUNET_HELLO_iterate_addresses (h,
4575 &add_to_foreign_address_list,
4577 try_transmission_to_peer (n);
4581 #if DEBUG_TRANSPORT_HELLO
4582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4583 "No existing neighbor record for %s!\n",
4586 GNUNET_STATISTICS_update (stats,
4587 gettext_noop ("# no existing neighbour record (validating HELLO)"),
4591 GNUNET_STATISTICS_update (stats,
4592 gettext_noop ("# HELLO validations (update case)"),
4595 GNUNET_HELLO_iterate_new_addresses (chvc->hello,
4597 GNUNET_TIME_relative_to_absolute (HELLO_REVALIDATION_START_TIME),
4604 * Process HELLO-message.
4606 * @param plugin transport involved, may be NULL
4607 * @param message the actual message
4608 * @return GNUNET_OK if the HELLO was well-formed, GNUNET_SYSERR otherwise
4611 process_hello (struct TransportPlugin *plugin,
4612 const struct GNUNET_MessageHeader *message)
4615 struct GNUNET_PeerIdentity target;
4616 const struct GNUNET_HELLO_Message *hello;
4617 struct CheckHelloValidatedContext *chvc;
4618 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
4619 struct NeighbourList *n;
4620 #if DEBUG_TRANSPORT_HELLO > 2
4624 hsize = ntohs (message->size);
4625 if ((ntohs (message->type) != GNUNET_MESSAGE_TYPE_HELLO) ||
4626 (hsize < sizeof (struct GNUNET_MessageHeader)))
4629 return GNUNET_SYSERR;
4631 GNUNET_STATISTICS_update (stats,
4632 gettext_noop ("# HELLOs received for validation"),
4636 hello = (const struct GNUNET_HELLO_Message *) message;
4637 if (GNUNET_OK != GNUNET_HELLO_get_key (hello, &publicKey))
4639 #if DEBUG_TRANSPORT_HELLO
4640 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4641 "Unable to get public key from `%s' for `%4s'!\n",
4643 GNUNET_i2s (&target));
4645 GNUNET_break_op (0);
4646 return GNUNET_SYSERR;
4648 GNUNET_CRYPTO_hash (&publicKey,
4649 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4650 &target.hashPubKey);
4652 #if DEBUG_TRANSPORT_HELLO
4653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4654 "Received `%s' message for `%4s'\n",
4656 GNUNET_i2s (&target));
4658 if (0 == memcmp (&my_identity,
4660 sizeof (struct GNUNET_PeerIdentity)))
4662 GNUNET_STATISTICS_update (stats,
4663 gettext_noop ("# HELLOs ignored for validation (is my own HELLO)"),
4668 n = find_neighbour (&target);
4670 (! n->public_key_valid) )
4672 GNUNET_HELLO_get_key (hello, &n->publicKey);
4673 n->public_key_valid = GNUNET_YES;
4676 /* check if load is too high before doing expensive stuff */
4677 if (GNUNET_SCHEDULER_get_load (GNUNET_SCHEDULER_PRIORITY_BACKGROUND) > MAX_HELLO_LOAD)
4679 GNUNET_STATISTICS_update (stats,
4680 gettext_noop ("# HELLOs ignored due to high load"),
4683 #if DEBUG_TRANSPORT_HELLO
4684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4685 "Ignoring `%s' for `%4s', load too high.\n",
4687 GNUNET_i2s (&target));
4694 while (NULL != chvc)
4696 if (GNUNET_HELLO_equals (hello,
4698 GNUNET_TIME_absolute_get ()).abs_value > 0)
4700 #if DEBUG_TRANSPORT_HELLO > 2
4701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4702 "Received duplicate `%s' message for `%4s'; ignored\n",
4704 GNUNET_i2s (&target));
4706 return GNUNET_OK; /* validation already pending */
4708 if (GNUNET_HELLO_size (hello) == GNUNET_HELLO_size (chvc->hello))
4709 GNUNET_break (0 != memcmp (hello, chvc->hello,
4710 GNUNET_HELLO_size(hello)));
4715 struct NeighbourList *temp_neighbor = find_neighbour(&target);
4716 if ((NULL != temp_neighbor))
4718 fprintf(stderr, "Already know peer, ignoring hello\n");
4723 #if DEBUG_TRANSPORT_HELLO > 2
4726 my_id = GNUNET_strdup(GNUNET_i2s(plugin->env.my_identity));
4728 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4729 "%s: Starting validation of `%s' message for `%4s' via '%s' of size %u\n",
4732 GNUNET_i2s (&target),
4734 GNUNET_HELLO_size(hello));
4739 chvc = GNUNET_malloc (sizeof (struct CheckHelloValidatedContext) + hsize);
4741 chvc->hello = (const struct GNUNET_HELLO_Message *) &chvc[1];
4742 memcpy (&chvc[1], hello, hsize);
4743 GNUNET_CONTAINER_DLL_insert (chvc_head,
4746 /* finally, check if HELLO was previously validated
4747 (continuation will then schedule actual validation) */
4748 GNUNET_STATISTICS_update (stats,
4749 gettext_noop ("# peerinfo process hello iterate requests"),
4752 GNUNET_STATISTICS_update (stats,
4753 gettext_noop ("# outstanding peerinfo iterate requests"),
4756 chvc->piter = GNUNET_PEERINFO_iterate (peerinfo,
4758 HELLO_VERIFICATION_TIMEOUT,
4759 &check_hello_validated, chvc);
4765 * The peer specified by the given neighbour has timed-out or a plugin
4766 * has disconnected. We may either need to do nothing (other plugins
4767 * still up), or trigger a full disconnect and clean up. This
4768 * function updates our state and does the necessary notifications.
4769 * Also notifies our clients that the neighbour is now officially
4772 * @param n the neighbour list entry for the peer
4773 * @param check GNUNET_YES to check if ALL addresses for this peer
4774 * are gone, GNUNET_NO to force a disconnect of the peer
4775 * regardless of whether other addresses exist.
4778 disconnect_neighbour (struct NeighbourList *n, int check)
4780 struct ReadyList *rpos;
4781 struct NeighbourList *npos;
4782 struct NeighbourList *nprev;
4783 struct MessageQueue *mq;
4784 struct ForeignAddressList *peer_addresses;
4785 struct ForeignAddressList *peer_pos;
4787 if (GNUNET_YES == check)
4790 while (NULL != rpos)
4792 peer_addresses = rpos->addresses;
4793 while (peer_addresses != NULL)
4795 // Do not disconnect if: an address is connected or an inbound address exists
4796 if ((GNUNET_YES == peer_addresses->connected) || (peer_addresses->addrlen == 0))
4799 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4800 "NOT Disconnecting from `%4s', still have live address `%s'!\n",
4801 GNUNET_i2s (&n->id),
4802 a2s (peer_addresses->ready_list->plugin->short_name,
4803 peer_addresses->addr,
4804 peer_addresses->addrlen));
4806 return; /* still connected */
4808 peer_addresses = peer_addresses->next;
4814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4815 "Disconnecting from `%4s'\n",
4816 GNUNET_i2s (&n->id));
4819 /* remove n from neighbours list */
4822 while ((npos != NULL) && (npos != n))
4827 GNUNET_assert (npos != NULL);
4829 neighbours = n->next;
4831 nprev->next = n->next;
4833 /* notify all clients about disconnect */
4834 if (GNUNET_YES == n->received_pong)
4835 notify_clients_disconnect (&n->id);
4837 ats_modify_problem_state(ats, ATS_MODIFIED);
4839 /* clean up all plugins, cancel connections and pending transmissions */
4840 while (NULL != (rpos = n->plugins))
4842 n->plugins = rpos->next;
4843 rpos->plugin->api->disconnect (rpos->plugin->api->cls, &n->id);
4844 while (rpos->addresses != NULL)
4846 peer_pos = rpos->addresses;
4847 rpos->addresses = peer_pos->next;
4848 if (peer_pos->connected == GNUNET_YES)
4849 GNUNET_STATISTICS_update (stats,
4850 gettext_noop ("# connected addresses"),
4853 if (GNUNET_YES == peer_pos->validated)
4854 GNUNET_STATISTICS_update (stats,
4855 gettext_noop ("# peer addresses considered valid"),
4858 if (GNUNET_SCHEDULER_NO_TASK != peer_pos->revalidate_task)
4860 GNUNET_SCHEDULER_cancel (peer_pos->revalidate_task);
4861 peer_pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
4863 GNUNET_free(peer_pos->ressources);
4864 peer_pos->ressources = NULL;
4865 GNUNET_free(peer_pos->quality);
4866 peer_pos->ressources = NULL;
4867 GNUNET_free(peer_pos);
4872 /* free all messages on the queue */
4873 while (NULL != (mq = n->messages_head))
4875 GNUNET_STATISTICS_update (stats,
4876 gettext_noop ("# bytes in message queue for other peers"),
4877 - (int64_t) mq->message_buf_size,
4879 GNUNET_STATISTICS_update (stats,
4880 gettext_noop ("# bytes discarded due to disconnect"),
4881 mq->message_buf_size,
4883 GNUNET_CONTAINER_DLL_remove (n->messages_head,
4886 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
4888 sizeof(struct GNUNET_PeerIdentity)));
4892 while (NULL != (mq = n->cont_head))
4895 GNUNET_CONTAINER_DLL_remove (n->cont_head,
4898 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
4900 sizeof(struct GNUNET_PeerIdentity)));
4904 if (n->timeout_task != GNUNET_SCHEDULER_NO_TASK)
4906 GNUNET_SCHEDULER_cancel (n->timeout_task);
4907 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4909 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4911 GNUNET_SCHEDULER_cancel (n->retry_task);
4912 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4914 if (n->piter != NULL)
4916 GNUNET_PEERINFO_iterate_cancel (n->piter);
4917 GNUNET_STATISTICS_update (stats,
4918 gettext_noop ("# outstanding peerinfo iterate requests"),
4923 /* finally, free n itself */
4924 GNUNET_STATISTICS_update (stats,
4925 gettext_noop ("# active neighbours"),
4928 GNUNET_free_non_null (n->pre_connect_message_buffer);
4934 * We have received a PING message from someone. Need to send a PONG message
4935 * in response to the peer by any means necessary.
4938 handle_ping (void *cls, const struct GNUNET_MessageHeader *message,
4939 const struct GNUNET_PeerIdentity *peer,
4940 struct Session *session,
4941 const char *sender_address,
4942 uint16_t sender_address_len)
4944 struct TransportPlugin *plugin = cls;
4945 struct SessionHeader *session_header = (struct SessionHeader*) session;
4946 struct TransportPingMessage *ping;
4947 struct TransportPongMessage *pong;
4948 struct NeighbourList *n;
4949 struct ReadyList *rl;
4950 struct ForeignAddressList *fal;
4951 struct OwnAddressList *oal;
4957 if (ntohs (message->size) < sizeof (struct TransportPingMessage))
4959 GNUNET_break_op (0);
4960 return GNUNET_SYSERR;
4963 ping = (struct TransportPingMessage *) message;
4964 if (0 != memcmp (&ping->target,
4965 plugin->env.my_identity,
4966 sizeof (struct GNUNET_PeerIdentity)))
4969 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4970 _("Received `%s' message from `%s' destined for `%s' which is not me!\n"),
4972 (sender_address != NULL)
4973 ? a2s (plugin->short_name,
4974 (const struct sockaddr *)sender_address,
4977 GNUNET_i2s (&ping->target));
4979 return GNUNET_SYSERR;
4982 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4983 "Processing `%s' from `%s'\n",
4985 (sender_address != NULL)
4986 ? a2s (plugin->short_name,
4987 (const struct sockaddr *)sender_address,
4991 GNUNET_STATISTICS_update (stats,
4992 gettext_noop ("# PING messages received"),
4995 addr = (const char*) &ping[1];
4996 alen = ntohs (message->size) - sizeof (struct TransportPingMessage);
4997 slen = strlen (plugin->short_name) + 1;
5000 /* peer wants to confirm that we have an outbound connection to him */
5001 if (session == NULL)
5003 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5004 _("Refusing to create PONG since I do not have a session with `%s'.\n"),
5006 return GNUNET_SYSERR;
5008 /* FIXME-urg: the use of 'sender_address' in the code below is doubly-wrong:
5009 1) it is NULL when we need to have a real value
5010 2) it is documented to be the address of the sender (source-IP), where
5011 what we actually want is our LISTEN IP (what we 'bound' to); which we don't even
5014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5015 "Creating PONG indicating that we received a connection at our address `%s' from `%s'.\n",
5016 a2s (plugin->short_name,
5018 sender_address_len),
5021 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5022 pong->header.size = htons (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5023 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5024 pong->purpose.size =
5025 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5027 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5028 sizeof (struct GNUNET_PeerIdentity) + sender_address_len + slen);
5029 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING);
5030 pong->challenge = ping->challenge;
5031 pong->addrlen = htonl(sender_address_len + slen);
5034 sizeof(struct GNUNET_PeerIdentity));
5038 if ((sender_address!=NULL) && (sender_address_len > 0))
5039 memcpy (&((char*)&pong[1])[slen],
5041 sender_address_len);
5042 if (GNUNET_TIME_absolute_get_remaining (session_header->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4)
5044 /* create / update cached sig */
5046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5047 "Creating PONG signature to indicate active connection.\n");
5049 session_header->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5050 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5051 GNUNET_assert (GNUNET_OK ==
5052 GNUNET_CRYPTO_rsa_sign (my_private_key,
5054 &session_header->pong_signature));
5058 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5060 memcpy (&pong->signature,
5061 &session_header->pong_signature,
5062 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5068 /* peer wants to confirm that this is one of our addresses */
5072 plugin->api->check_address (plugin->api->cls,
5076 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5077 _("Not confirming PING with address `%s' since I cannot confirm having this address.\n"),
5078 a2s (plugin->short_name,
5083 oal = plugin->addresses;
5086 if ( (oal->addrlen == alen) &&
5093 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + alen + slen);
5094 pong->header.size = htons (sizeof (struct TransportPongMessage) + alen + slen);
5095 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5096 pong->purpose.size =
5097 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5099 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5100 sizeof (struct GNUNET_PeerIdentity) + alen + slen);
5101 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN);
5102 pong->challenge = ping->challenge;
5103 pong->addrlen = htonl(alen + slen);
5106 sizeof(struct GNUNET_PeerIdentity));
5107 memcpy (&pong[1], plugin->short_name, slen);
5108 memcpy (&((char*)&pong[1])[slen], addr, alen);
5109 if ( (oal != NULL) &&
5110 (GNUNET_TIME_absolute_get_remaining (oal->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4) )
5112 /* create / update cached sig */
5114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5115 "Creating PONG signature to indicate ownership.\n");
5117 oal->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5118 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5119 GNUNET_assert (GNUNET_OK ==
5120 GNUNET_CRYPTO_rsa_sign (my_private_key,
5122 &oal->pong_signature));
5123 memcpy (&pong->signature,
5124 &oal->pong_signature,
5125 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5127 else if (oal == NULL)
5129 /* not using cache (typically DV-only) */
5130 pong->expiration = GNUNET_TIME_absolute_hton (GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5131 GNUNET_assert (GNUNET_OK ==
5132 GNUNET_CRYPTO_rsa_sign (my_private_key,
5138 /* can used cached version */
5139 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5140 memcpy (&pong->signature,
5141 &oal->pong_signature,
5142 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5145 n = find_neighbour(peer);
5146 GNUNET_assert (n != NULL);
5147 did_pong = GNUNET_NO;
5148 /* first try reliable response transmission */
5152 fal = rl->addresses;
5155 if (-1 != rl->plugin->api->send (rl->plugin->api->cls,
5158 ntohs (pong->header.size),
5159 TRANSPORT_PONG_PRIORITY,
5160 HELLO_VERIFICATION_TIMEOUT,
5167 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5168 "Transmitted PONG to `%s' via reliable mechanism\n",
5171 GNUNET_STATISTICS_update (stats,
5172 gettext_noop ("# PONGs unicast via reliable transport"),
5178 did_pong = GNUNET_YES;
5183 /* no reliable method found, do multicast */
5184 GNUNET_STATISTICS_update (stats,
5185 gettext_noop ("# PONGs multicast to all available addresses"),
5191 fal = rl->addresses;
5194 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5195 "Transmitting PONG to `%s' via unreliable mechanism `%s':%s\n",
5197 a2s (rl->plugin->short_name,
5200 rl->plugin->short_name);
5201 transmit_to_peer(NULL, fal,
5202 TRANSPORT_PONG_PRIORITY,
5203 HELLO_VERIFICATION_TIMEOUT,
5205 ntohs(pong->header.size),
5208 did_pong = GNUNET_YES;
5214 if (GNUNET_YES != did_pong)
5215 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5216 _("Could not send PONG to `%s': no address available\n"),
5223 * Function called by the plugin for each received message. Update
5224 * data volumes, possibly notify plugins about reducing the rate at
5225 * which they read from the socket and generally forward to our
5228 * @param cls the "struct TransportPlugin *" we gave to the plugin
5229 * @param peer (claimed) identity of the other peer
5230 * @param message the message, NULL if we only care about
5231 * learning about the delay until we should receive again
5232 * @param ats_data information for automatic transport selection
5233 * @param ats_count number of elements in ats not including 0-terminator
5234 * @param session identifier used for this session (can be NULL)
5235 * @param sender_address binary address of the sender (if observed)
5236 * @param sender_address_len number of bytes in sender_address
5237 * @return how long in ms the plugin should wait until receiving more data
5238 * (plugins that do not support this, can ignore the return value)
5240 static struct GNUNET_TIME_Relative
5241 plugin_env_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
5242 const struct GNUNET_MessageHeader *message,
5243 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
5245 struct Session *session,
5246 const char *sender_address,
5247 uint16_t sender_address_len)
5249 struct TransportPlugin *plugin = cls;
5250 struct ReadyList *service_context;
5251 struct ForeignAddressList *peer_address;
5253 struct NeighbourList *n;
5254 struct GNUNET_TIME_Relative ret;
5258 if (0 == memcmp (peer,
5260 sizeof (struct GNUNET_PeerIdentity)))
5262 /* refuse to receive from myself */
5264 return GNUNET_TIME_UNIT_FOREVER_REL;
5266 if (is_blacklisted (peer, plugin))
5267 return GNUNET_TIME_UNIT_FOREVER_REL;
5268 n = find_neighbour (peer);
5270 n = setup_new_neighbour (peer, GNUNET_YES);
5271 service_context = n->plugins;
5272 while ((service_context != NULL) && (plugin != service_context->plugin))
5273 service_context = service_context->next;
5274 GNUNET_assert ((plugin->api->send == NULL) || (service_context != NULL));
5275 peer_address = NULL;
5278 for (c=0; c<ats_count; c++)
5279 if (ntohl(ats_data[c].type) == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
5280 distance = ntohl(ats_data[c].value);
5283 if (message != NULL)
5285 if ( (session != NULL) ||
5286 (sender_address != NULL) )
5287 peer_address = add_peer_address (n,
5291 sender_address_len);
5292 if (peer_address != NULL)
5294 update_addr_ats(peer_address, ats_data, ats_count);
5295 update_addr_value(peer_address, distance, GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5297 peer_address->distance = distance;
5298 if (GNUNET_YES == peer_address->validated)
5299 mark_address_connected (peer_address);
5300 peer_address->timeout
5301 = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5302 schedule_next_ping (peer_address);
5304 /* update traffic received amount ... */
5305 msize = ntohs (message->size);
5307 GNUNET_STATISTICS_update (stats,
5308 gettext_noop ("# bytes received from other peers"),
5311 n->distance = distance;
5313 GNUNET_TIME_relative_to_absolute
5314 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5315 GNUNET_SCHEDULER_cancel (n->timeout_task);
5317 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
5318 &neighbour_timeout_task, n);
5319 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
5321 /* dropping message due to frequent inbound volume violations! */
5322 GNUNET_log (GNUNET_ERROR_TYPE_WARNING |
5323 GNUNET_ERROR_TYPE_BULK,
5325 ("Dropping incoming message due to repeated bandwidth quota (%u b/s) violations (total of %u).\n"),
5326 n->in_tracker.available_bytes_per_s__,
5327 n->quota_violation_count);
5328 GNUNET_STATISTICS_update (stats,
5329 gettext_noop ("# bandwidth quota violations by other peers"),
5332 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
5334 if ((ntohs(message->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_ATS) &&
5335 (ntohs(message->size) == (sizeof (struct GNUNET_MessageHeader) + sizeof (uint32_t))))
5337 uint32_t value = ntohl(*((uint32_t *) &message[1]));
5338 //GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "GNUNET_MESSAGE_TYPE_TRANSPORT_ATS: %i \n", value);
5339 /* Force ressource and quality update */
5340 if ((value == 4) && (ats != NULL))
5341 ats_modify_problem_state(ats, ATS_QUALITY_COST_UPDATED);
5342 /* Force cost update */
5343 if ((value == 3) && (ats != NULL))
5344 ats_modify_problem_state(ats, ATS_COST_UPDATED);
5345 /* Force quality update */
5346 if ((value == 2) && (ats != NULL))
5347 ats_modify_problem_state(ats, ATS_QUALITY_UPDATED);
5348 /* Force full rebuild */
5349 if ((value == 1) && (ats != NULL))
5350 ats_modify_problem_state(ats, ATS_MODIFIED);
5354 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5355 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
5356 ntohs (message->type),
5357 ntohs (message->size),
5360 switch (ntohs (message->type))
5362 case GNUNET_MESSAGE_TYPE_HELLO:
5363 GNUNET_STATISTICS_update (stats,
5364 gettext_noop ("# HELLO messages received from other peers"),
5367 process_hello (plugin, message);
5369 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
5370 handle_ping (plugin, message, peer, session, sender_address, sender_address_len);
5371 if (! n->received_pong)
5372 transmit_plain_ping (n);
5374 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
5375 handle_pong (plugin, message, peer, sender_address, sender_address_len);
5377 case GNUNET_MESSAGE_TYPE_TRANSPORT_ATS:
5380 handle_payload_message (message, n);
5384 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 0);
5385 if (ret.rel_value > 0)
5388 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5389 "Throttling read (%llu bytes excess at %u b/s), waiting %llu ms before reading more.\n",
5390 (unsigned long long) n->in_tracker.consumption_since_last_update__,
5391 (unsigned int) n->in_tracker.available_bytes_per_s__,
5392 (unsigned long long) ret.rel_value);
5394 GNUNET_STATISTICS_update (stats,
5395 gettext_noop ("# ms throttling suggested"),
5396 (int64_t) ret.rel_value,
5403 * Handle START-message. This is the first message sent to us
5404 * by any client which causes us to add it to our list.
5406 * @param cls closure (always NULL)
5407 * @param client identification of the client
5408 * @param message the actual message
5411 handle_start (void *cls,
5412 struct GNUNET_SERVER_Client *client,
5413 const struct GNUNET_MessageHeader *message)
5415 const struct StartMessage *start;
5416 struct TransportClient *c;
5417 struct ConnectInfoMessage * cim;
5418 struct NeighbourList *n;
5422 start = (const struct StartMessage*) message;
5424 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5425 "Received `%s' request from client\n", "START");
5430 if (c->client == client)
5432 /* client already on our list! */
5434 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5439 if ( (GNUNET_NO != ntohl (start->do_check)) &&
5440 (0 != memcmp (&start->self,
5442 sizeof (struct GNUNET_PeerIdentity))) )
5444 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5445 _("Rejecting control connection from peer `%s', which is not me!\n"),
5446 GNUNET_i2s (&start->self));
5447 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5450 c = GNUNET_malloc (sizeof (struct TransportClient));
5454 if (our_hello != NULL)
5457 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5458 "Sending our own `%s' to new client\n", "HELLO");
5460 transmit_to_client (c,
5461 (const struct GNUNET_MessageHeader *) our_hello,
5463 /* tell new client about all existing connections */
5465 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
5466 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
5470 cim = GNUNET_malloc (size);
5471 cim->header.size = htons (size);
5472 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
5473 cim->ats_count = htonl(ats_count);
5474 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
5475 (&(cim->ats))[2].value = htonl (0);
5479 if (GNUNET_YES == n->received_pong)
5481 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5482 (&(cim->ats))[0].value = htonl (n->distance);
5483 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
5484 (&(cim->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
5486 transmit_to_client (c, &cim->header, GNUNET_NO);
5494 #if DEBUG_TRANSPORT_HELLO
5495 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5496 "No HELLO created yet, will transmit HELLO to client later!\n");
5500 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5505 * Handle HELLO-message.
5507 * @param cls closure (always NULL)
5508 * @param client identification of the client
5509 * @param message the actual message
5512 handle_hello (void *cls,
5513 struct GNUNET_SERVER_Client *client,
5514 const struct GNUNET_MessageHeader *message)
5518 GNUNET_STATISTICS_update (stats,
5519 gettext_noop ("# HELLOs received from clients"),
5522 ret = process_hello (NULL, message);
5523 GNUNET_SERVER_receive_done (client, ret);
5528 * Closure for 'transmit_client_message'; followed by
5529 * 'msize' bytes of the actual message.
5531 struct TransmitClientMessageContext
5534 * Client on whom's behalf we are sending.
5536 struct GNUNET_SERVER_Client *client;
5539 * Timeout for the transmission.
5541 struct GNUNET_TIME_Absolute timeout;
5549 * Size of the message in bytes.
5556 * Schedule transmission of a message we got from a client to a peer.
5558 * @param cls the 'struct TransmitClientMessageContext*'
5559 * @param n destination, or NULL on error (in that case, drop the message)
5562 transmit_client_message (void *cls,
5563 struct NeighbourList *n)
5565 struct TransmitClientMessageContext *tcmc = cls;
5566 struct TransportClient *tc;
5569 while ((tc != NULL) && (tc->client != tcmc->client))
5574 transmit_to_peer (tc, NULL, tcmc->priority,
5575 GNUNET_TIME_absolute_get_remaining (tcmc->timeout),
5577 tcmc->msize, GNUNET_NO, n);
5579 GNUNET_SERVER_receive_done (tcmc->client, GNUNET_OK);
5580 GNUNET_SERVER_client_drop (tcmc->client);
5586 * Handle SEND-message.
5588 * @param cls closure (always NULL)
5589 * @param client identification of the client
5590 * @param message the actual message
5593 handle_send (void *cls,
5594 struct GNUNET_SERVER_Client *client,
5595 const struct GNUNET_MessageHeader *message)
5597 const struct OutboundMessage *obm;
5598 const struct GNUNET_MessageHeader *obmm;
5599 struct TransmitClientMessageContext *tcmc;
5603 size = ntohs (message->size);
5605 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
5608 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5611 GNUNET_STATISTICS_update (stats,
5612 gettext_noop ("# payload received for other peers"),
5615 obm = (const struct OutboundMessage *) message;
5616 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
5617 msize = size - sizeof (struct OutboundMessage);
5619 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5620 "Received `%s' request from client with target `%4s' and message of type %u and size %u\n",
5621 "SEND", GNUNET_i2s (&obm->peer),
5625 tcmc = GNUNET_malloc (sizeof (struct TransmitClientMessageContext) + msize);
5626 tcmc->client = client;
5627 tcmc->priority = ntohl (obm->priority);
5628 tcmc->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_ntoh (obm->timeout));
5629 tcmc->msize = msize;
5630 /* FIXME: this memcpy can be up to 7% of our total runtime */
5631 memcpy (&tcmc[1], obmm, msize);
5632 GNUNET_SERVER_client_keep (client);
5633 setup_peer_check_blacklist (&obm->peer, GNUNET_YES,
5634 &transmit_client_message,
5640 * Handle request connect message
5642 * @param cls closure (always NULL)
5643 * @param client identification of the client
5644 * @param message the actual message
5647 handle_request_connect (void *cls,
5648 struct GNUNET_SERVER_Client *client,
5649 const struct GNUNET_MessageHeader *message)
5651 const struct TransportRequestConnectMessage *trcm =
5652 (const struct TransportRequestConnectMessage *) message;
5654 GNUNET_STATISTICS_update (stats,
5655 gettext_noop ("# REQUEST CONNECT messages received"),
5659 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
5660 "Received a request connect message for peer `%s'\n",
5661 GNUNET_i2s(&trcm->peer));
5663 setup_peer_check_blacklist (&trcm->peer, GNUNET_YES,
5665 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5670 * Handle SET_QUOTA-message.
5672 * @param cls closure (always NULL)
5673 * @param client identification of the client
5674 * @param message the actual message
5677 handle_set_quota (void *cls,
5678 struct GNUNET_SERVER_Client *client,
5679 const struct GNUNET_MessageHeader *message)
5681 const struct QuotaSetMessage *qsm =
5682 (const struct QuotaSetMessage *) message;
5683 struct NeighbourList *n;
5685 GNUNET_STATISTICS_update (stats,
5686 gettext_noop ("# SET QUOTA messages received"),
5689 n = find_neighbour (&qsm->peer);
5692 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5693 GNUNET_STATISTICS_update (stats,
5694 gettext_noop ("# SET QUOTA messages ignored (no such peer)"),
5700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5701 "Received `%s' request (new quota %u, old quota %u) from client for peer `%4s'\n",
5703 (unsigned int) ntohl (qsm->quota.value__),
5704 (unsigned int) n->in_tracker.available_bytes_per_s__,
5705 GNUNET_i2s (&qsm->peer));
5707 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker,
5709 if (0 == ntohl (qsm->quota.value__))
5712 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5713 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&n->id),
5716 GNUNET_STATISTICS_update (stats,
5717 gettext_noop ("# disconnects due to quota of 0"),
5720 disconnect_neighbour (n, GNUNET_NO);
5722 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5727 * Take the given address and append it to the set of results sent back to
5730 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
5731 * @param address the resolved name, NULL to indicate the last response
5734 transmit_address_to_client (void *cls, const char *address)
5736 struct GNUNET_SERVER_TransmitContext *tc = cls;
5739 if (NULL != address)
5741 slen = strlen (address) + 1;
5742 GNUNET_SERVER_transmit_context_append_data (tc, address, slen,
5743 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5747 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
5753 * Handle AddressLookup-message.
5755 * @param cls closure (always NULL)
5756 * @param client identification of the client
5757 * @param message the actual message
5760 handle_address_lookup (void *cls,
5761 struct GNUNET_SERVER_Client *client,
5762 const struct GNUNET_MessageHeader *message)
5764 const struct AddressLookupMessage *alum;
5765 struct TransportPlugin *lsPlugin;
5766 const char *nameTransport;
5767 const char *address;
5769 struct GNUNET_SERVER_TransmitContext *tc;
5770 struct GNUNET_TIME_Absolute timeout;
5771 struct GNUNET_TIME_Relative rtimeout;
5774 size = ntohs (message->size);
5775 if (size < sizeof (struct AddressLookupMessage))
5777 GNUNET_break_op (0);
5778 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5781 alum = (const struct AddressLookupMessage *) message;
5782 uint32_t addressLen = ntohl (alum->addrlen);
5783 if (size <= sizeof (struct AddressLookupMessage) + addressLen)
5785 GNUNET_break_op (0);
5786 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5789 address = (const char *) &alum[1];
5790 nameTransport = (const char *) &address[addressLen];
5792 [size - sizeof (struct AddressLookupMessage) - addressLen - 1] != '\0')
5794 GNUNET_break_op (0);
5795 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5798 timeout = GNUNET_TIME_absolute_ntoh (alum->timeout);
5799 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5800 numeric = ntohl (alum->numeric_only);
5801 lsPlugin = find_transport (nameTransport);
5802 if (NULL == lsPlugin)
5804 tc = GNUNET_SERVER_transmit_context_create (client);
5805 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5806 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5807 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
5810 GNUNET_SERVER_disable_receive_done_warning (client);
5811 tc = GNUNET_SERVER_transmit_context_create (client);
5812 lsPlugin->api->address_pretty_printer (lsPlugin->api->cls,
5814 address, addressLen,
5817 &transmit_address_to_client, tc);
5821 * Handle PeerAddressLookupMessage.
5823 * @param cls closure (always NULL)
5824 * @param client identification of the client
5825 * @param message the actual message
5828 handle_peer_address_lookup (void *cls,
5829 struct GNUNET_SERVER_Client *client,
5830 const struct GNUNET_MessageHeader *message)
5832 const struct PeerAddressLookupMessage *peer_address_lookup;
5833 struct NeighbourList *neighbor_iterator;
5834 struct ReadyList *ready_iterator;
5835 struct ForeignAddressList *foreign_address_iterator;
5836 struct TransportPlugin *transport_plugin;
5839 struct GNUNET_SERVER_TransmitContext *tc;
5840 struct GNUNET_TIME_Absolute timeout;
5841 struct GNUNET_TIME_Relative rtimeout;
5844 size = ntohs (message->size);
5845 if (size < sizeof (struct PeerAddressLookupMessage))
5847 GNUNET_break_op (0);
5848 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5851 peer_address_lookup = (const struct PeerAddressLookupMessage *) message;
5853 timeout = GNUNET_TIME_absolute_ntoh (peer_address_lookup->timeout);
5854 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5856 neighbor_iterator = neighbours;
5857 while (neighbor_iterator != NULL)
5859 if (0 == memcmp(&neighbor_iterator->id, &peer_address_lookup->peer, sizeof(struct GNUNET_PeerIdentity)))
5861 neighbor_iterator = neighbor_iterator->next;
5864 /* Found no neighbor matching this peer id (shouldn't be possible, but...) */
5865 if (neighbor_iterator == NULL)
5868 tc = GNUNET_SERVER_transmit_context_create (client);
5869 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5870 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5871 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
5875 ready_iterator = neighbor_iterator->plugins;
5876 GNUNET_SERVER_disable_receive_done_warning (client);
5877 tc = GNUNET_SERVER_transmit_context_create (client);
5878 while(ready_iterator != NULL)
5880 foreign_address_iterator = ready_iterator->addresses;
5881 while (foreign_address_iterator != NULL)
5883 transport_plugin = foreign_address_iterator->ready_list->plugin;
5884 if (foreign_address_iterator->addr != NULL)
5886 GNUNET_asprintf (&addr_buf, "%s --- %s",
5887 a2s (transport_plugin->short_name,
5888 foreign_address_iterator->addr,
5889 foreign_address_iterator->addrlen),
5890 (foreign_address_iterator->connected
5891 == GNUNET_YES) ? "CONNECTED"
5893 transmit_address_to_client(tc, addr_buf);
5894 GNUNET_free(addr_buf);
5896 else if (foreign_address_iterator->addrlen == 0)
5898 GNUNET_asprintf (&addr_buf, "%s --- %s", "<inbound>",
5899 (foreign_address_iterator->connected
5900 == GNUNET_YES) ? "CONNECTED"
5902 transmit_address_to_client (tc, addr_buf);
5903 GNUNET_free(addr_buf);
5906 foreign_address_iterator = foreign_address_iterator->next;
5908 ready_iterator = ready_iterator->next;
5910 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5911 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5912 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
5916 * Handle AddressIterateMessage
5918 * @param cls closure (always NULL)
5919 * @param client identification of the client
5920 * @param message the actual message
5923 handle_address_iterate (void *cls,
5924 struct GNUNET_SERVER_Client *client,
5925 const struct GNUNET_MessageHeader *message)
5927 const struct AddressIterateMessage *address_iterate;
5928 struct NeighbourList *neighbor_iterator;
5929 struct ReadyList *ready_iterator;
5930 struct ForeignAddressList *foreign_address_iterator;
5931 struct TransportPlugin *transport_plugin;
5934 struct GNUNET_SERVER_TransmitContext *tc;
5935 struct GNUNET_TIME_Absolute timeout;
5936 struct GNUNET_TIME_Relative rtimeout;
5939 size = ntohs (message->size);
5940 if (size < sizeof (struct AddressIterateMessage))
5942 GNUNET_break_op (0);
5943 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5946 address_iterate = (const struct AddressIterateMessage *) message;
5948 timeout = GNUNET_TIME_absolute_ntoh (address_iterate->timeout);
5949 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5951 GNUNET_SERVER_disable_receive_done_warning (client);
5952 tc = GNUNET_SERVER_transmit_context_create (client);
5954 neighbor_iterator = neighbours;
5955 while (neighbor_iterator != NULL)
5957 ready_iterator = neighbor_iterator->plugins;
5958 while (ready_iterator != NULL)
5960 foreign_address_iterator = ready_iterator->addresses;
5961 while (foreign_address_iterator != NULL)
5963 transport_plugin = foreign_address_iterator->ready_list->plugin;
5964 if (foreign_address_iterator->addr != NULL)
5966 GNUNET_asprintf (&addr_buf, "%s:%s --- %s, %s",
5967 GNUNET_i2s(&neighbor_iterator->id),
5968 a2s (transport_plugin->short_name,
5969 foreign_address_iterator->addr,
5970 foreign_address_iterator->addrlen),
5971 (foreign_address_iterator->connected
5972 == GNUNET_YES) ? "CONNECTED"
5974 (foreign_address_iterator->validated
5975 == GNUNET_YES) ? "VALIDATED"
5977 transmit_address_to_client (tc, addr_buf);
5978 GNUNET_free(addr_buf);
5980 else if (foreign_address_iterator->addrlen == 0)
5982 GNUNET_asprintf (&addr_buf, "%s:%s --- %s",
5983 GNUNET_i2s (&neighbor_iterator->id),
5985 (foreign_address_iterator->connected
5986 == GNUNET_YES) ? "CONNECTED"
5988 (foreign_address_iterator->validated
5989 == GNUNET_YES) ? "VALIDATED"
5991 transmit_address_to_client (tc, addr_buf);
5992 GNUNET_free(addr_buf);
5995 foreign_address_iterator = foreign_address_iterator->next;
5997 ready_iterator = ready_iterator->next;
5999 neighbor_iterator = neighbor_iterator->next;
6002 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
6003 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
6004 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
6009 * Setup the environment for this plugin.
6012 create_environment (struct TransportPlugin *plug)
6014 plug->env.cfg = cfg;
6015 plug->env.my_identity = &my_identity;
6016 plug->env.our_hello = &our_hello;
6017 plug->env.cls = plug;
6018 plug->env.receive = &plugin_env_receive;
6019 plug->env.notify_address = &plugin_env_notify_address;
6020 plug->env.session_end = &plugin_env_session_end;
6021 plug->env.max_connections = max_connect_per_transport;
6022 plug->env.stats = stats;
6027 * Start the specified transport (load the plugin).
6030 start_transport (struct GNUNET_SERVER_Handle *server,
6033 struct TransportPlugin *plug;
6036 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6037 _("Loading `%s' transport plugin\n"), name);
6038 GNUNET_asprintf (&libname, "libgnunet_plugin_transport_%s", name);
6039 plug = GNUNET_malloc (sizeof (struct TransportPlugin));
6040 create_environment (plug);
6041 plug->short_name = GNUNET_strdup (name);
6042 plug->lib_name = libname;
6043 plug->next = plugins;
6045 plug->api = GNUNET_PLUGIN_load (libname, &plug->env);
6046 if (plug->api == NULL)
6048 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6049 _("Failed to load transport plugin for `%s'\n"), name);
6050 GNUNET_free (plug->short_name);
6051 plugins = plug->next;
6052 GNUNET_free (libname);
6059 * Called whenever a client is disconnected. Frees our
6060 * resources associated with that client.
6062 * @param cls closure
6063 * @param client identification of the client
6066 client_disconnect_notification (void *cls,
6067 struct GNUNET_SERVER_Client *client)
6069 struct TransportClient *pos;
6070 struct TransportClient *prev;
6071 struct ClientMessageQueueEntry *mqe;
6072 struct Blacklisters *bl;
6073 struct BlacklistCheck *bc;
6078 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
6079 "Client disconnected, cleaning up.\n");
6081 /* clean up blacklister */
6085 if (bl->client == client)
6090 if (bc->bl_pos == bl)
6092 bc->bl_pos = bl->next;
6095 GNUNET_CONNECTION_notify_transmit_ready_cancel (bc->th);
6098 if (bc->task == GNUNET_SCHEDULER_NO_TASK)
6099 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
6105 GNUNET_CONTAINER_DLL_remove (bl_head,
6108 GNUNET_SERVER_client_drop (bl->client);
6114 /* clean up 'normal' clients */
6117 while ((pos != NULL) && (pos->client != client))
6124 while (NULL != (mqe = pos->message_queue_head))
6126 GNUNET_CONTAINER_DLL_remove (pos->message_queue_head,
6127 pos->message_queue_tail,
6129 pos->message_count--;
6133 clients = pos->next;
6135 prev->next = pos->next;
6136 if (GNUNET_YES == pos->tcs_pending)
6141 if (pos->th != NULL)
6143 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
6146 GNUNET_break (0 == pos->message_count);
6152 * Function called when the service shuts down. Unloads our plugins
6153 * and cancels pending validations.
6155 * @param cls closure, unused
6156 * @param tc task context (unused)
6159 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6161 struct TransportPlugin *plug;
6162 struct TransportPlugin *tmp;
6163 struct OwnAddressList *al;
6164 struct CheckHelloValidatedContext *chvc;
6166 shutdown_in_progress = GNUNET_YES;
6167 while (neighbours != NULL)
6170 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6171 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&neighbours->id),
6174 disconnect_neighbour (neighbours, GNUNET_NO);
6177 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6178 "Transport service is unloading plugins...\n");
6181 while (plug != NULL)
6183 if (plug->address_update_task != GNUNET_SCHEDULER_NO_TASK)
6185 GNUNET_SCHEDULER_cancel (plug->address_update_task);
6186 plug->address_update_task = GNUNET_SCHEDULER_NO_TASK;
6188 GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
6189 GNUNET_free (plug->lib_name);
6190 GNUNET_free (plug->short_name);
6191 while (NULL != (al = plug->addresses))
6193 plug->addresses = al->next;
6200 if (my_private_key != NULL)
6201 GNUNET_CRYPTO_rsa_key_free (my_private_key);
6202 GNUNET_free_non_null (our_hello);
6204 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
6207 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6208 validation_map = NULL;
6211 if (ats_task != GNUNET_SCHEDULER_NO_TASK)
6213 GNUNET_SCHEDULER_cancel(ats_task);
6214 ats_task = GNUNET_SCHEDULER_NO_TASK;
6219 /* free 'chvc' data structure */
6220 while (NULL != (chvc = chvc_head))
6222 chvc_head = chvc->next;
6223 if (chvc->piter != NULL)
6225 GNUNET_PEERINFO_iterate_cancel (chvc->piter);
6226 GNUNET_STATISTICS_update (stats,
6227 gettext_noop ("# outstanding peerinfo iterate requests"),
6234 GNUNET_assert (chvc->ve_count == 0);
6241 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6244 if (peerinfo != NULL)
6246 GNUNET_PEERINFO_disconnect (peerinfo);
6249 if (GNUNET_SCHEDULER_NO_TASK != hello_task)
6251 GNUNET_SCHEDULER_cancel (hello_task);
6252 hello_task = GNUNET_SCHEDULER_NO_TASK;
6254 /* Can we assume those are gone by now, or do we need to clean up
6256 GNUNET_break (bl_head == NULL);
6257 GNUNET_break (bc_head == NULL);
6261 void ats_result_cb ()
6263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6264 "ATS Result callback\n");
6268 void create_ats_information ( struct ATS_peer **p,
6270 struct ATS_mechanism ** m,
6274 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6275 "ATS requires clean address information\n");
6277 struct ATS_mechanism * mechanisms;
6278 struct ATS_peer *peers;
6280 int connected_addresses = 0;
6283 struct NeighbourList *next = neighbours;
6287 int found_addresses = GNUNET_NO;
6288 struct ReadyList *r_next = next->plugins;
6289 while (r_next != NULL)
6291 struct ForeignAddressList * a_next = r_next->addresses;
6292 while (a_next != NULL)
6295 found_addresses = GNUNET_YES;
6296 a_next = a_next->next;
6298 r_next = r_next->next;
6300 if (found_addresses) c_peers++;
6305 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6306 "Found %u peers with % u transport mechanisms\n", c_peers, c_mechs);
6309 if ((c_peers == 0) && (c_mechs == 0))
6318 mechanisms = GNUNET_malloc((1+c_mechs) * sizeof (struct ATS_mechanism));
6319 peers = GNUNET_malloc((1+c_peers) * sizeof (struct ATS_peer));
6327 int found_addresses = GNUNET_NO;
6328 struct ReadyList *r_next = next->plugins;
6329 while (r_next != NULL)
6331 struct ForeignAddressList * a_next = r_next->addresses;
6332 while (a_next != NULL)
6334 if (a_next->connected == GNUNET_YES)
6335 connected_addresses ++;
6336 if (found_addresses == GNUNET_NO)
6338 peers[c_peers].peer = next->id;
6339 peers[c_peers].m_head = NULL;
6340 peers[c_peers].m_tail = NULL;
6341 peers[c_peers].f = 1.0 / c_mechs;
6344 mechanisms[c_mechs].addr = a_next;
6345 mechanisms[c_mechs].col_index = c_mechs;
6346 mechanisms[c_mechs].peer = &peers[c_peers];
6347 mechanisms[c_mechs].next = NULL;
6348 mechanisms[c_mechs].plugin = r_next->plugin;
6349 mechanisms[c_mechs].ressources = a_next->ressources;
6350 mechanisms[c_mechs].quality = a_next->quality;
6352 GNUNET_CONTAINER_DLL_insert_tail(peers[c_peers].m_head,
6353 peers[c_peers].m_tail,
6354 &mechanisms[c_mechs]);
6355 found_addresses = GNUNET_YES;
6358 a_next = a_next->next;
6360 r_next = r_next->next;
6362 if (found_addresses == GNUNET_YES)
6373 GNUNET_STATISTICS_set(stats,
6374 gettext_noop ("# connected addresses"),
6375 connected_addresses,
6380 schedule_ats (void *cls,
6381 const struct GNUNET_SCHEDULER_TaskContext *tc)
6383 struct ATS_Handle *ats = (struct ATS_Handle *) cls;
6387 ats_task = GNUNET_SCHEDULER_NO_TASK;
6388 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
6391 if (shutdown_in_progress == GNUNET_YES)
6394 struct GNUNET_TIME_Relative delta =
6395 GNUNET_TIME_absolute_get_difference (last_ats_execution, GNUNET_TIME_absolute_get());
6396 if (delta.rel_value < ats_minimum_interval.rel_value)
6399 GNUNET_log (GNUNET_ERROR_TYPE_BULK,
6400 "Minimum time between cycles not reached\n");
6406 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Running scheduled calculation\n");
6408 ats_calculate_bandwidth_distribution (ats, stats);
6409 last_ats_execution = GNUNET_TIME_absolute_get();
6411 ats_task = GNUNET_SCHEDULER_add_delayed (ats_regular_interval,
6412 &schedule_ats, ats);
6415 struct ForeignAddressList * get_preferred_ats_address (
6416 struct NeighbourList *n)
6418 // TODO get ATS prefered address
6419 return find_ready_address(n);
6423 * Initiate transport service.
6425 * @param cls closure
6426 * @param server the initialized server
6427 * @param c configuration to use
6431 struct GNUNET_SERVER_Handle *server,
6432 const struct GNUNET_CONFIGURATION_Handle *c)
6434 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
6435 {&handle_start, NULL,
6436 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
6437 {&handle_hello, NULL,
6438 GNUNET_MESSAGE_TYPE_HELLO, 0},
6439 {&handle_send, NULL,
6440 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
6441 {&handle_request_connect, NULL,
6442 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT, sizeof(struct TransportRequestConnectMessage)},
6443 {&handle_set_quota, NULL,
6444 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
6445 {&handle_address_lookup, NULL,
6446 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP,
6448 {&handle_peer_address_lookup, NULL,
6449 GNUNET_MESSAGE_TYPE_TRANSPORT_PEER_ADDRESS_LOOKUP,
6451 {&handle_address_iterate, NULL,
6452 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE,
6454 {&handle_blacklist_init, NULL,
6455 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT, sizeof (struct GNUNET_MessageHeader)},
6456 {&handle_blacklist_reply, NULL,
6457 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY, sizeof (struct BlacklistMessage)},
6463 unsigned long long tneigh;
6466 shutdown_in_progress = GNUNET_NO;
6468 stats = GNUNET_STATISTICS_create ("transport", cfg);
6469 validation_map = GNUNET_CONTAINER_multihashmap_create (64);
6470 /* parse configuration */
6472 GNUNET_CONFIGURATION_get_value_number (c,
6477 GNUNET_CONFIGURATION_get_value_filename (c,
6479 "HOSTKEY", &keyfile)))
6481 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6483 ("Transport service is lacking key configuration settings. Exiting.\n"));
6484 GNUNET_SCHEDULER_shutdown ();
6487 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6490 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6491 validation_map = NULL;
6495 max_connect_per_transport = (uint32_t) tneigh;
6496 peerinfo = GNUNET_PEERINFO_connect (cfg);
6497 if (peerinfo == NULL)
6499 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6500 _("Could not access PEERINFO service. Exiting.\n"));
6501 GNUNET_SCHEDULER_shutdown ();
6504 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6507 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6508 validation_map = NULL;
6509 GNUNET_free (keyfile);
6512 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
6513 GNUNET_free (keyfile);
6514 if (my_private_key == NULL)
6516 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6518 ("Transport service could not access hostkey. Exiting.\n"));
6519 GNUNET_SCHEDULER_shutdown ();
6522 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6525 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6526 validation_map = NULL;
6529 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
6530 GNUNET_CRYPTO_hash (&my_public_key,
6531 sizeof (my_public_key), &my_identity.hashPubKey);
6532 /* setup notification */
6533 GNUNET_SERVER_disconnect_notify (server,
6534 &client_disconnect_notification, NULL);
6535 /* load plugins... */
6538 GNUNET_CONFIGURATION_get_value_string (c,
6539 "TRANSPORT", "PLUGINS", &plugs))
6541 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6542 _("Starting transport plugins `%s'\n"), plugs);
6543 pos = strtok (plugs, " ");
6546 start_transport (server, pos);
6548 pos = strtok (NULL, " ");
6550 GNUNET_free (plugs);
6552 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
6553 &shutdown_task, NULL);
6557 /* Initializing ATS */
6560 unsigned long long value;
6565 int v_b_min = 64000;
6568 ats_minimum_interval = ATS_MIN_INTERVAL;
6569 ats_regular_interval = ATS_EXEC_INTERVAL;
6571 /* loading cost ressources */
6572 for (co=0; co<available_ressources; co++)
6574 GNUNET_asprintf(§ion,"%s_UP",ressources[co].cfg_param);
6575 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
6577 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg,
6583 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6584 "Found ressource cost: [%s] = %llu\n",
6587 ressources[co].c_max = value;
6590 GNUNET_free (section);
6591 GNUNET_asprintf(§ion,"%s_DOWN",ressources[co].cfg_param);
6592 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
6594 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg,
6600 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6601 "Found ressource cost: [%s] = %llu\n",
6604 ressources[co].c_min = value;
6607 GNUNET_free (section);
6610 ats = ats_init (D, U, R, v_b_min, v_n_min,
6611 ATS_MAX_ITERATIONS, ATS_MAX_EXEC_DURATION,
6612 create_ats_information,
6615 int log_problem = GNUNET_NO;
6616 int log_solution = GNUNET_NO;
6617 int overwrite_dump = GNUNET_NO;
6618 int minimum_peers = 0;
6619 int minimum_addresses = 0;
6621 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MLP"))
6622 log_problem = GNUNET_CONFIGURATION_get_value_yesno (cfg,
6623 "transport","DUMP_MLP");
6625 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_SOLUTION"))
6626 log_solution = GNUNET_CONFIGURATION_get_value_yesno (cfg,
6627 "transport","DUMP_SOLUTION");
6628 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
6629 overwrite_dump = GNUNET_CONFIGURATION_get_value_yesno (cfg,
6630 "transport","DUMP_OVERWRITE");
6631 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_PEERS"))
6633 GNUNET_CONFIGURATION_get_value_number(cfg,
6634 "transport","DUMP_MIN_PEERS", &value);
6635 minimum_peers = value;
6637 if (GNUNET_CONFIGURATION_have_value(cfg,
6638 "transport", "DUMP_MIN_ADDRS"))
6640 GNUNET_CONFIGURATION_get_value_number(cfg,
6641 "transport","DUMP_MIN_ADDRS", &value);
6642 minimum_addresses= value;
6644 if (GNUNET_CONFIGURATION_have_value(cfg,
6645 "transport", "DUMP_OVERWRITE"))
6647 GNUNET_CONFIGURATION_get_value_number(cfg,
6648 "transport","DUMP_OVERWRITE", &value);
6649 overwrite_dump = value;
6652 if (GNUNET_CONFIGURATION_have_value(cfg,
6653 "transport", "ATS_MIN_INTERVAL"))
6655 GNUNET_CONFIGURATION_get_value_number(cfg,
6656 "transport","ATS_MIN_INTERVAL", &value);
6657 ats_minimum_interval.rel_value = value;
6660 if (GNUNET_CONFIGURATION_have_value(cfg,
6661 "transport", "ATS_EXEC_INTERVAL"))
6663 GNUNET_CONFIGURATION_get_value_number(cfg,
6664 "transport","ATS_EXEC_INTERVAL", &value);
6665 ats_regular_interval.rel_value = value;
6667 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
6669 GNUNET_CONFIGURATION_get_value_number(cfg,
6670 "transport","ATS_MIN_INTERVAL", &value);
6671 ats_minimum_interval.rel_value = value;
6674 ats_set_logging_options (ats,
6682 ats_task = GNUNET_SCHEDULER_add_now (&schedule_ats, ats);
6688 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6689 _("Transport service ready.\n"));
6691 /* If we have a blacklist file, read from it */
6692 read_blacklist_file(cfg);
6693 /* process client requests */
6694 GNUNET_SERVER_add_handlers (server, handlers);
6699 * The main function for the transport service.
6701 * @param argc number of arguments from the command line
6702 * @param argv command line arguments
6703 * @return 0 ok, 1 on error
6706 main (int argc, char *const *argv)
6708 a2s (NULL, NULL, 0); /* make compiler happy */
6709 return (GNUNET_OK ==
6710 GNUNET_SERVICE_run (argc,
6713 GNUNET_SERVICE_OPTION_NONE,
6714 &run, NULL)) ? 0 : 1;
6717 /* end of gnunet-service-transport.c */