2 This file is part of GNUnet.
3 (C) 2010,2011 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
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13 General Public License for more details.
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22 * @file transport/gnunet-service-transport-new.c
24 * @author Christian Grothoff
27 #include "gnunet_util_lib.h"
28 #include "gnunet_statistics_service.h"
29 #include "gnunet_transport_service.h"
30 #include "gnunet_peerinfo_service.h"
31 #include "gnunet_ats_service.h"
32 #include "gnunet-service-transport.h"
33 #include "gnunet-service-transport_blacklist.h"
34 #include "gnunet-service-transport_clients.h"
35 #include "gnunet-service-transport_hello.h"
36 #include "gnunet-service-transport_neighbours.h"
37 #include "gnunet-service-transport_plugins.h"
38 #include "gnunet-service-transport_validation.h"
39 #include "transport.h"
46 struct GNUNET_STATISTICS_Handle *GST_stats;
49 * Configuration handle.
51 const struct GNUNET_CONFIGURATION_Handle *GST_cfg;
54 * Configuration handle.
56 struct GNUNET_PeerIdentity GST_my_identity;
59 * Handle to peerinfo service.
61 struct GNUNET_PEERINFO_Handle *GST_peerinfo;
66 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded GST_my_public_key;
71 struct GNUNET_CRYPTO_RsaPrivateKey *GST_my_private_key;
76 struct GNUNET_ATS_SchedulingHandle *GST_ats;
80 * Transmit our HELLO message to the given (connected) neighbour.
82 * @param cls the 'HELLO' message
83 * @param target a connected neighbour
84 * @param ats performance information (unused)
85 * @param ats_count number of records in ats (unused)
86 * @param transport plugin
88 * @param addrlen address length
91 transmit_our_hello (void *cls, const struct GNUNET_PeerIdentity *target,
92 const struct GNUNET_ATS_Information *ats,
94 const char * transport,
98 const struct GNUNET_MessageHeader *hello = cls;
100 GST_neighbours_send (target, (const char *) hello, ntohs (hello->size),
101 GNUNET_CONSTANTS_HELLO_ADDRESS_EXPIRATION, NULL, NULL);
106 * My HELLO has changed. Tell everyone who should know.
109 * @param hello new HELLO
112 process_hello_update (void *cls, const struct GNUNET_MessageHeader *hello)
114 GST_clients_broadcast (hello, GNUNET_NO);
115 GST_neighbours_iterate (&transmit_our_hello, (void *) hello);
121 * We received some payload. Prepare to pass it on to our clients.
123 * @param peer (claimed) identity of the other peer
124 * @param message the message, NULL if we only care about
125 * learning about the delay until we should receive again -- FIXME!
126 * @param ats performance information
127 * @param ats_count number of records in ats
128 * @return how long the plugin should wait until receiving more data
130 static struct GNUNET_TIME_Relative
131 process_payload (const struct GNUNET_PeerIdentity *peer,
132 const struct GNUNET_MessageHeader *message,
133 const struct GNUNET_ATS_Information *ats,
136 struct GNUNET_TIME_Relative ret;
138 struct InboundMessage *im;
139 size_t msg_size = ntohs (message->size);
140 size_t size = sizeof (struct InboundMessage) + msg_size + sizeof (struct GNUNET_ATS_Information) * ats_count;
142 struct GNUNET_ATS_Information *ap;
144 ret = GNUNET_TIME_UNIT_ZERO;
145 do_forward = GNUNET_SYSERR;
147 GST_neighbours_calculate_receive_delay (peer,
153 if (!GST_neighbours_test_connected (peer))
156 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Discarded %u bytes type %u payload from peer `%s'\n",
158 ntohs (message->type),
161 GNUNET_STATISTICS_update (GST_stats,
162 gettext_noop ("# bytes payload discarded due to not connected peer "),
168 if (do_forward != GNUNET_YES)
170 im = (struct InboundMessage*) buf;
171 im->header.size = htons (size);
172 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
173 im->ats_count = htonl (ats_count);
175 ap = (struct GNUNET_ATS_Information*) &im[1];
176 memcpy (ap, ats, ats_count * sizeof (struct GNUNET_ATS_Information));
177 memcpy (&ap[ats_count], message, ntohs (message->size));
179 GST_clients_broadcast (&im->header, GNUNET_YES);
186 * Function called by the transport for each received message.
187 * This function should also be called with "NULL" for the
188 * message to signal that the other peer disconnected.
190 * @param cls closure, const char* with the name of the plugin we received the message from
191 * @param peer (claimed) identity of the other peer
192 * @param message the message, NULL if we only care about
193 * learning about the delay until we should receive again -- FIXME!
194 * @param ats performance information
195 * @param ats_count number of records in ats
196 * @param session identifier used for this session (NULL for plugins
197 * that do not offer bi-directional communication to the sender
198 * using the same "connection")
199 * @param sender_address binary address of the sender (if we established the
200 * connection or are otherwise sure of it; should be NULL
201 * for inbound TCP/UDP connections since it it not clear
202 * that we could establish ourselves a connection to that
203 * IP address and get the same system)
204 * @param sender_address_len number of bytes in sender_address
205 * @return how long the plugin should wait until receiving more data
206 * (plugins that do not support this, can ignore the return value)
208 static struct GNUNET_TIME_Relative
209 plugin_env_receive_callback (void *cls, const struct GNUNET_PeerIdentity *peer,
210 const struct GNUNET_MessageHeader *message,
211 const struct GNUNET_ATS_Information *ats,
212 uint32_t ats_count, struct Session *session,
213 const char *sender_address,
214 uint16_t sender_address_len)
216 const char *plugin_name = cls;
217 struct GNUNET_TIME_Relative ret;
220 ret = GNUNET_TIME_UNIT_ZERO;
223 type = ntohs (message->type);
226 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Received Message with type %u\n", type);
231 case GNUNET_MESSAGE_TYPE_HELLO:
232 GST_validation_handle_hello (message);
234 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
236 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
237 "Processing `%s' from `%s'\n", "PING",
238 (sender_address != NULL) ? GST_plugins_a2s (plugin_name,
243 GST_validation_handle_ping (peer, message, plugin_name, session,
244 sender_address, sender_address_len);
246 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
249 "Processing `%s' from `%s'\n", "PONG",
250 (sender_address != NULL) ? GST_plugins_a2s (plugin_name,
255 GST_validation_handle_pong (peer, message);
257 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT:
258 GST_neighbours_handle_connect (message,
260 plugin_name, sender_address, sender_address_len,
261 session, ats, ats_count);
263 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK:
264 GST_neighbours_handle_connect_ack (message,
266 plugin_name, sender_address, sender_address_len,
267 session, ats, ats_count);
269 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_ACK:
270 GST_neighbours_handle_ack (message,
272 plugin_name, sender_address, sender_address_len,
273 session, ats, ats_count);
275 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT:
276 GST_neighbours_handle_disconnect_message (peer, message);
278 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE:
279 GST_neighbours_keepalive (peer);
282 /* should be payload */
283 ret = process_payload (peer,
290 /* FIXME: this should not be needed, and not sure it's good to have it, but without
291 this connections seem to go extra-slow */
292 GNUNET_ATS_address_update (GST_ats, peer,
293 plugin_name, sender_address, sender_address_len,
298 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
299 "Allowing receive from peer %s to continue in %llu ms\n",
301 (unsigned long long) ret.rel_value);
308 * Function that will be called for each address the transport
309 * is aware that it might be reachable under. Update our HELLO.
311 * @param cls name of the plugin (const char*)
312 * @param add_remove should the address added (YES) or removed (NO) from the
313 * set of valid addresses?
314 * @param addr one of the addresses of the host
315 * the specific address format depends on the transport
316 * @param addrlen length of the address
319 plugin_env_address_change_notification (void *cls, int add_remove,
320 const void *addr, size_t addrlen)
322 const char *plugin_name = cls;
324 GST_hello_modify_addresses (add_remove, plugin_name, addr, addrlen);
329 * Function that will be called whenever the plugin internally
330 * cleans up a session pointer and hence the service needs to
331 * discard all of those sessions as well. Plugins that do not
332 * use sessions can simply omit calling this function and always
333 * use NULL wherever a session pointer is needed. This function
334 * should be called BEFORE a potential "TransmitContinuation"
335 * from the "TransmitFunction".
338 * @param peer which peer was the session for
339 * @param session which session is being destoyed
342 plugin_env_session_end (void *cls, const struct GNUNET_PeerIdentity *peer,
343 struct Session *session)
346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
347 "Session %X to peer `%s' ended \n",
348 session, GNUNET_i2s (peer));
351 GNUNET_log_from (GNUNET_ERROR_TYPE_INFO | GNUNET_ERROR_TYPE_BULK,
353 "Telling ATS to destroy session %p from peer %s\n",
356 GNUNET_ATS_address_destroyed (GST_ats, peer, NULL, NULL, 0, session);
357 GST_neighbours_session_terminated (peer, session);
362 * Function called by ATS to notify the callee that the
363 * assigned bandwidth or address for a given peer was changed. If the
364 * callback is called with address/bandwidth assignments of zero, the
365 * ATS disconnect function will still be called once the disconnect
369 * @param peer identity of the peer
370 * @param plugin_name name of the transport plugin, NULL to disconnect
371 * @param session session to use (if available)
372 * @param plugin_addr address to use (if available)
373 * @param plugin_addr_len number of bytes in addr
374 * @param bandwidth_out assigned outbound bandwidth for the connection, 0 to disconnect from peer
375 * @param bandwidth_in assigned inbound bandwidth for the connection, 0 to disconnect from peer
378 ats_request_address_change (void *cls, const struct GNUNET_PeerIdentity *peer,
379 const char *plugin_name,
380 const void *plugin_addr, size_t plugin_addr_len,
381 struct Session *session,
382 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
383 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
384 const struct GNUNET_ATS_Information * ats,
387 uint32_t bw_in = ntohl (bandwidth_in.value__);
388 uint32_t bw_out = ntohl (bandwidth_out.value__);
390 /* ATS tells me to disconnect from peer*/
391 if ((bw_in == 0) && (bw_out == 0))
394 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
395 "ATS tells me to disconnect from peer `%s'\n",
398 GST_neighbours_force_disconnect(peer);
401 /* will never return GNUNET_YES since connection is to be established */
402 GST_neighbours_switch_to_address_3way (peer, plugin_name, plugin_addr,
403 plugin_addr_len, session, ats, ats_count,
404 bandwidth_in, bandwidth_out);
409 * Function called to notify transport users that another
410 * peer connected to us.
413 * @param peer the peer that connected
414 * @param ats performance data
415 * @param ats_count number of entries in ats
418 neighbours_connect_notification (void *cls,
419 const struct GNUNET_PeerIdentity *peer,
420 const struct GNUNET_ATS_Information
421 *ats, uint32_t ats_count)
423 size_t len = sizeof (struct ConnectInfoMessage) +
424 ats_count * sizeof (struct GNUNET_ATS_Information);
426 struct ConnectInfoMessage *connect_msg = (struct ConnectInfoMessage *) buf;
427 struct GNUNET_ATS_Information *ap;
429 connect_msg->header.size = htons (sizeof (buf));
430 connect_msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
431 connect_msg->ats_count = htonl (ats_count);
432 connect_msg->id = *peer;
433 ap = (struct GNUNET_ATS_Information *) &connect_msg[1];
435 ats_count * sizeof (struct GNUNET_ATS_Information));
436 GST_clients_broadcast (&connect_msg->header, GNUNET_NO);
441 * Function called to notify transport users that another
442 * peer disconnected from us.
445 * @param peer the peer that disconnected
448 neighbours_disconnect_notification (void *cls,
449 const struct GNUNET_PeerIdentity *peer)
451 struct DisconnectInfoMessage disconnect_msg;
453 disconnect_msg.header.size = htons (sizeof (struct DisconnectInfoMessage));
454 disconnect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
455 disconnect_msg.reserved = htonl (0);
456 disconnect_msg.peer = *peer;
457 GST_clients_broadcast (&disconnect_msg.header, GNUNET_NO);
462 * Function called when the service shuts down. Unloads our plugins
463 * and cancels pending validations.
465 * @param cls closure, unused
466 * @param tc task context (unused)
469 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
471 GST_validation_stop ();
472 GST_plugins_unload ();
473 GST_neighbours_stop ();
474 GNUNET_ATS_scheduling_done (GST_ats);
477 GST_blacklist_stop ();
480 if (GST_peerinfo != NULL)
482 GNUNET_PEERINFO_disconnect (GST_peerinfo);
485 if (GST_stats != NULL)
487 GNUNET_STATISTICS_destroy (GST_stats, GNUNET_NO);
490 if (GST_my_private_key != NULL)
492 GNUNET_CRYPTO_rsa_key_free (GST_my_private_key);
493 GST_my_private_key = NULL;
499 * Initiate transport service.
502 * @param server the initialized server
503 * @param c configuration to use
506 run (void *cls, struct GNUNET_SERVER_Handle *server,
507 const struct GNUNET_CONFIGURATION_Handle *c)
514 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
517 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
519 ("Transport service is lacking key configuration settings. Exiting.\n"));
520 GNUNET_SCHEDULER_shutdown ();
523 GST_my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
524 GNUNET_free (keyfile);
525 if (GST_my_private_key == NULL)
527 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
528 _("Transport service could not access hostkey. Exiting.\n"));
529 GNUNET_SCHEDULER_shutdown ();
532 GST_stats = GNUNET_STATISTICS_create ("transport", c);
533 GST_peerinfo = GNUNET_PEERINFO_connect (c);
534 GNUNET_CRYPTO_rsa_key_get_public (GST_my_private_key, &GST_my_public_key);
535 GNUNET_CRYPTO_hash (&GST_my_public_key, sizeof (GST_my_public_key),
536 &GST_my_identity.hashPubKey);
537 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
539 if (GST_peerinfo == NULL)
541 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
542 _("Could not access PEERINFO service. Exiting.\n"));
543 GNUNET_SCHEDULER_shutdown ();
547 /* start subsystems */
548 GST_hello_start (&process_hello_update, NULL);
549 GST_blacklist_start (server);
550 GST_plugins_load (&plugin_env_receive_callback,
551 &plugin_env_address_change_notification,
552 &plugin_env_session_end);
553 GST_ats = GNUNET_ATS_scheduling_init (GST_cfg, &ats_request_address_change, NULL);
554 GST_neighbours_start (NULL, &neighbours_connect_notification,
555 &neighbours_disconnect_notification);
556 GST_clients_start (server);
557 GST_validation_start ();
562 * The main function for the transport service.
564 * @param argc number of arguments from the command line
565 * @param argv command line arguments
566 * @return 0 ok, 1 on error
569 main (int argc, char *const *argv)
572 GNUNET_SERVICE_run (argc, argv, "transport",
573 GNUNET_SERVICE_OPTION_NONE, &run, NULL)) ? 0 : 1;
576 /* end of file gnunet-service-transport-new.c */