2 This file is part of GNUnet.
3 (C) 2010,2011 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.
15 You should have received a copy of the GNU General Public License
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
24 * @author Christian Grothoff
27 #include "gnunet_util_lib.h"
28 #include "gnunet_hello_lib.h"
29 #include "gnunet_statistics_service.h"
30 #include "gnunet_transport_service.h"
31 #include "gnunet_peerinfo_service.h"
32 #include "gnunet_ats_service.h"
33 #include "gnunet-service-transport.h"
34 #include "gnunet-service-transport_blacklist.h"
35 #include "gnunet-service-transport_clients.h"
36 #include "gnunet-service-transport_hello.h"
37 #include "gnunet-service-transport_neighbours.h"
38 #include "gnunet-service-transport_plugins.h"
39 #include "gnunet-service-transport_validation.h"
40 #include "gnunet-service-transport_manipulation.h"
41 #include "transport.h"
48 struct GNUNET_STATISTICS_Handle *GST_stats;
51 * Configuration handle.
53 const struct GNUNET_CONFIGURATION_Handle *GST_cfg;
56 * Configuration handle.
58 struct GNUNET_PeerIdentity GST_my_identity;
61 * Handle to peerinfo service.
63 struct GNUNET_PEERINFO_Handle *GST_peerinfo;
66 * Handle to our service's server.
68 static struct GNUNET_SERVER_Handle *GST_server;
73 struct GNUNET_CRYPTO_EddsaPrivateKey *GST_my_private_key;
78 struct GNUNET_ATS_SchedulingHandle *GST_ats;
81 * DEBUGGING connection counter
83 static int connections;
86 * Hello address expiration
88 struct GNUNET_TIME_Relative hello_expiration;
92 * Transmit our HELLO message to the given (connected) neighbour.
94 * @param cls the 'HELLO' message
95 * @param target a connected neighbour
96 * @param address the address
97 * @param bandwidth_in inbound quota in NBO
98 * @param bandwidth_out outbound quota in NBO
101 transmit_our_hello (void *cls, const struct GNUNET_PeerIdentity *target,
102 const struct GNUNET_HELLO_Address *address,
103 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
104 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
106 const struct GNUNET_MessageHeader *hello = cls;
108 GST_neighbours_send (target, (const char *) hello, ntohs (hello->size),
109 hello_expiration, NULL, NULL);
114 * My HELLO has changed. Tell everyone who should know.
117 * @param hello new HELLO
120 process_hello_update (void *cls, const struct GNUNET_MessageHeader *hello)
122 GST_clients_broadcast (hello, GNUNET_NO);
123 GST_neighbours_iterate (&transmit_our_hello, (void *) hello);
129 * We received some payload. Prepare to pass it on to our clients.
131 * @param peer (claimed) identity of the other peer
132 * @param address the address
133 * @param session session used
134 * @param message the message to process
135 * @return how long the plugin should wait until receiving more data
137 static struct GNUNET_TIME_Relative
138 process_payload (const struct GNUNET_PeerIdentity *peer,
139 const struct GNUNET_HELLO_Address *address,
140 struct Session *session,
141 const struct GNUNET_MessageHeader *message)
143 struct GNUNET_TIME_Relative ret;
145 struct InboundMessage *im;
146 size_t msg_size = ntohs (message->size);
148 sizeof (struct InboundMessage) + msg_size;
149 char buf[size] GNUNET_ALIGN;
151 do_forward = GNUNET_SYSERR;
152 ret = GST_neighbours_calculate_receive_delay (peer, msg_size, &do_forward);
153 if (! GST_neighbours_test_connected (peer))
155 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
156 "Discarded %u bytes type %u payload from peer `%s'\n",
158 ntohs (message->type), GNUNET_i2s (peer));
159 GNUNET_STATISTICS_update (GST_stats,
161 ("# bytes payload discarded due to not connected peer"),
162 msg_size, GNUNET_NO);
166 GST_ats_add_address ((struct GNUNET_HELLO_Address *) address, session);
168 if (GNUNET_YES != do_forward)
170 im = (struct InboundMessage *) buf;
171 im->header.size = htons (size);
172 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
174 memcpy (&im[1], message, ntohs (message->size));
175 GST_clients_broadcast (&im->header, GNUNET_YES);
181 * Function called by the transport for each received message.
182 * This function should also be called with "NULL" for the
183 * message to signal that the other peer disconnected.
185 * @param cls closure, const char* with the name of the plugin we received the message from
186 * @param peer (claimed) identity of the other peer
187 * @param message the message, NULL if we only care about
188 * learning about the delay until we should receive again -- FIXME!
189 * @param session identifier used for this session (NULL for plugins
190 * that do not offer bi-directional communication to the sender
191 * using the same "connection")
192 * @param sender_address binary address of the sender (if we established the
193 * connection or are otherwise sure of it; should be NULL
194 * for inbound TCP/UDP connections since it it not clear
195 * that we could establish ourselves a connection to that
196 * IP address and get the same system)
197 * @param sender_address_len number of bytes in sender_address
198 * @return how long the plugin should wait until receiving more data
199 * (plugins that do not support this, can ignore the return value)
201 struct GNUNET_TIME_Relative
202 GST_receive_callback (void *cls,
203 const struct GNUNET_PeerIdentity *peer,
204 const struct GNUNET_MessageHeader *message,
205 struct Session *session,
206 const char *sender_address,
207 uint16_t sender_address_len)
209 const char *plugin_name = cls;
210 struct GNUNET_TIME_Relative ret;
211 struct GNUNET_HELLO_Address address;
214 address.peer = *peer;
215 address.address = sender_address;
216 address.address_length = sender_address_len;
217 address.transport_name = plugin_name;
218 ret = GNUNET_TIME_UNIT_ZERO;
221 type = ntohs (message->type);
222 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
223 "Received Message with type %u from peer `%s'\n",
227 GNUNET_STATISTICS_update (GST_stats,
229 ("# bytes total received"),
230 ntohs (message->size), GNUNET_NO);
231 GST_neighbours_notify_data_recv (peer, &address, session, message);
235 case GNUNET_MESSAGE_TYPE_HELLO_LEGACY:
236 /* Legacy HELLO message, discard */
238 case GNUNET_MESSAGE_TYPE_HELLO:
239 GST_validation_handle_hello (message);
241 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
242 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
243 "Processing `%s' from `%s'\n", "PING",
245 NULL) ? GST_plugins_a2s (&address) : TRANSPORT_SESSION_INBOUND_STRING);
246 GST_validation_handle_ping (peer, message, &address, session);
248 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
249 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
250 "Processing `%s' from `%s'\n", "PONG",
252 NULL) ? GST_plugins_a2s (&address) : TRANSPORT_SESSION_INBOUND_STRING);
253 GST_validation_handle_pong (peer, message);
255 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT:
256 GST_neighbours_handle_connect (message, peer, &address, session);
258 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK:
259 GST_neighbours_handle_connect_ack (message, peer, &address, session);
261 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_ACK:
262 GST_neighbours_handle_session_ack (message, peer, &address, session);
264 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT:
265 GST_neighbours_handle_disconnect_message (peer, message);
267 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE:
268 GST_neighbours_keepalive (peer);
270 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE:
271 GST_neighbours_keepalive_response (peer);
274 /* should be payload */
275 GNUNET_STATISTICS_update (GST_stats,
277 ("# bytes payload received"),
278 ntohs (message->size), GNUNET_NO);
279 GST_neighbours_notify_payload_recv (peer, &address, session, message);
280 ret = process_payload (peer, &address, session, message);
284 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
285 "Allowing receive from peer %s to continue in %s\n",
287 GNUNET_STRINGS_relative_time_to_string (ret, GNUNET_YES));
293 * Function that will be called for each address the transport
294 * is aware that it might be reachable under. Update our HELLO.
296 * @param cls name of the plugin (const char*)
297 * @param add_remove should the address added (YES) or removed (NO) from the
298 * set of valid addresses?
299 * @param addr one of the addresses of the host
300 * the specific address format depends on the transport
301 * @param addrlen length of the @a addr
302 * @param dest_plugin destination plugin to use this address with
305 plugin_env_address_change_notification (void *cls, int add_remove,
306 const void *addr, size_t addrlen,
307 const char *dest_plugin)
309 struct GNUNET_HELLO_Address address;
311 address.peer = GST_my_identity;
312 address.transport_name = dest_plugin;
313 address.address = addr;
314 address.address_length = addrlen;
315 GST_hello_modify_addresses (add_remove, &address);
320 * Function that will be called whenever the plugin internally
321 * cleans up a session pointer and hence the service needs to
322 * discard all of those sessions as well. Plugins that do not
323 * use sessions can simply omit calling this function and always
324 * use NULL wherever a session pointer is needed. This function
325 * should be called BEFORE a potential "TransmitContinuation"
326 * from the "TransmitFunction".
329 * @param peer which peer was the session for
330 * @param session which session is being destoyed
333 plugin_env_session_end (void *cls, const struct GNUNET_PeerIdentity *peer,
334 struct Session *session)
336 const char *transport_name = cls;
337 struct GNUNET_HELLO_Address address;
339 GNUNET_assert (strlen (transport_name) > 0);
340 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Session %p to peer `%s' ended \n",
341 session, GNUNET_i2s (peer));
343 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
345 "Telling ATS to destroy session %p from peer %s\n",
346 session, GNUNET_i2s (peer));
347 address.peer = *peer;
348 address.address = NULL;
349 address.address_length = 0;
350 address.transport_name = transport_name;
351 GST_neighbours_session_terminated (peer, session);
353 /* Tell ATS that session has ended */
354 GNUNET_ATS_address_destroyed (GST_ats, &address, session);
359 * Function that will be called to figure if an address is an loopback,
360 * LAN, WAN etc. address
363 * @param addr binary address
364 * @param addrlen length of the address
365 * @return ATS Information containing the network type
367 static struct GNUNET_ATS_Information
368 plugin_env_address_to_type (void *cls,
369 const struct sockaddr *addr,
372 struct GNUNET_ATS_Information ats;
373 ats.type = htonl (GNUNET_ATS_NETWORK_TYPE);
374 ats.value = htonl (GNUNET_ATS_NET_UNSPECIFIED);
380 if (((addr->sa_family != AF_INET) && (addrlen != sizeof (struct sockaddr_in))) &&
381 ((addr->sa_family != AF_INET6) && (addrlen != sizeof (struct sockaddr_in6))) &&
382 (addr->sa_family != AF_UNIX))
384 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Malformed address with length %u `%s'\n",
386 GNUNET_a2s(addr, addrlen));
390 return GNUNET_ATS_address_get_type(GST_ats, addr, addrlen);
395 * Notify ATS about the new address including the network this address is
398 * @param address the address
399 * @param session the session
402 GST_ats_add_address (const struct GNUNET_HELLO_Address *address,
403 struct Session *session)
405 struct GNUNET_TRANSPORT_PluginFunctions *papi;
406 struct GNUNET_ATS_Information ats;
409 /* valid new address, let ATS know! */
410 if (NULL == address->transport_name)
415 if (NULL == (papi = GST_plugins_find (address->transport_name)))
417 /* we don't have the plugin for this address */
422 if (GNUNET_YES == GNUNET_ATS_session_known (GST_ats, address, session))
425 net = papi->get_network (NULL, (void *) session);
426 if (GNUNET_ATS_NET_UNSPECIFIED == net)
428 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
429 _("Could not obtain a valid network for `%s' %s\n"),
430 GNUNET_i2s (&address->peer), GST_plugins_a2s (address));
433 ats.type = htonl (GNUNET_ATS_NETWORK_TYPE);
434 ats.value = htonl(net);
435 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
436 "Notifying ATS about peer `%s''s new address `%s' session %p in network %s\n",
437 GNUNET_i2s (&address->peer),
438 (0 == address->address_length) ? "<inbound>" : GST_plugins_a2s (address),
440 GNUNET_ATS_print_network_type(net));
441 GNUNET_ATS_address_add (GST_ats,
442 address, session, &ats, 1);
447 * Notify ATS about property changes to an address
449 * @param peer the peer
450 * @param address the address
451 * @param session the session
452 * @param ats performance information
453 * @param ats_count number of elements in @a ats
456 GST_ats_update_metrics (const struct GNUNET_PeerIdentity *peer,
457 const struct GNUNET_HELLO_Address *address,
458 struct Session *session,
459 const struct GNUNET_ATS_Information *ats,
462 struct GNUNET_ATS_Information *ats_new;
464 if (GNUNET_NO == GNUNET_ATS_session_known (GST_ats, address, session))
467 /* Call to manipulation to manipulate ATS information */
468 ats_new = GST_manipulation_manipulate_metrics (peer, address, session, ats,
475 if (GNUNET_NO == GNUNET_ATS_address_update (GST_ats,
476 address, session, ats_new, ats_count))
478 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
479 _("Address or session unknown: failed to update properties for peer `%s' plugin `%s' address `%s' session %p\n"),
481 address->transport_name,
482 GST_plugins_a2s (address),
485 GNUNET_free (ats_new);
490 * Function that will be called to figure if an address is an loopback,
491 * LAN, WAN etc. address
494 * @param peer the peer
495 * @param address binary address
496 * @param address_len length of the @a address
497 * @param session the session
498 * @param ats the ats information to update
499 * @param ats_count the number of @a ats elements
502 plugin_env_update_metrics (void *cls,
503 const struct GNUNET_PeerIdentity *peer,
505 uint16_t address_len,
506 struct Session *session,
507 const struct GNUNET_ATS_Information *ats,
510 const char *plugin_name = cls;
511 struct GNUNET_HELLO_Address haddress;
513 if ((NULL == ats) || (0 == ats_count))
515 GNUNET_assert (NULL != GST_ats);
517 haddress.peer = *peer;
518 haddress.address = address;
519 haddress.address_length = address_len;
520 haddress.transport_name = plugin_name;
522 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
523 "Updating metrics for peer `%s' address %s session %p\n",
525 GST_plugins_a2s (&haddress),
527 GST_ats_update_metrics (peer, &haddress, session, ats, ats_count);
532 * Plugin tells transport service about a new (inbound) session
535 * @param peer the peer
536 * @param plugin plugin name
537 * @param address address
538 * @param address_len @a address length
539 * @param session the new session
540 * @param ats ats information
541 * @param ats_count number of @a ats information
544 plugin_env_session_start (void *cls,
545 const struct GNUNET_PeerIdentity *peer,
547 const void *address, uint16_t address_len,
548 struct Session *session,
549 const struct GNUNET_ATS_Information *ats,
552 struct GNUNET_HELLO_Address *addr;
570 addr = GNUNET_HELLO_address_allocate (peer, plugin, address, address_len);
571 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
572 "Notification from plugin `%s' about new session %p from peer `%s' address `%s'\n",
576 GST_plugins_a2s (addr));
577 GST_ats_add_address (addr, session);
580 GST_ats_update_metrics (peer, addr, session, ats, ats_count);
586 * Function called by ATS to notify the callee that the
587 * assigned bandwidth or address for a given peer was changed. If the
588 * callback is called with address/bandwidth assignments of zero, the
589 * ATS disconnect function will still be called once the disconnect
593 * @param address address to use (for peer given in address)
594 * @param session session to use (if available)
595 * @param bandwidth_out assigned outbound bandwidth for the connection in NBO,
596 * 0 to disconnect from peer
597 * @param bandwidth_in assigned inbound bandwidth for the connection in NBO,
598 * 0 to disconnect from peer
599 * @param ats ATS information
600 * @param ats_count number of @a ats elements
603 ats_request_address_change (void *cls,
604 const struct GNUNET_HELLO_Address *address,
605 struct Session *session,
606 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
607 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
608 const struct GNUNET_ATS_Information *ats,
611 uint32_t bw_in = ntohl (bandwidth_in.value__);
612 uint32_t bw_out = ntohl (bandwidth_out.value__);
614 /* ATS tells me to disconnect from peer */
615 if ((bw_in == 0) && (bw_out == 0))
617 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
618 "ATS tells me to disconnect from peer `%s'\n",
619 GNUNET_i2s (&address->peer));
620 GST_neighbours_force_disconnect (&address->peer);
623 GST_neighbours_switch_to_address (&address->peer, address, session, ats,
624 ats_count, bandwidth_in,
630 * Function called to notify transport users that another
631 * peer connected to us.
634 * @param peer the peer that connected
635 * @param bandwidth_in inbound bandwidth in NBO
636 * @param bandwidth_out outbound bandwidth in NBO
639 neighbours_connect_notification (void *cls,
640 const struct GNUNET_PeerIdentity *peer,
641 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
642 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
644 size_t len = sizeof (struct ConnectInfoMessage);
645 char buf[len] GNUNET_ALIGN;
646 struct ConnectInfoMessage *connect_msg = (struct ConnectInfoMessage *) buf;
649 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
650 "We are now connected to peer `%s' and %u peers in total\n",
651 GNUNET_i2s (peer), connections);
652 connect_msg->header.size = htons (sizeof (buf));
653 connect_msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
654 connect_msg->id = *peer;
655 connect_msg->quota_in = bandwidth_in;
656 connect_msg->quota_out = bandwidth_out;
657 GST_clients_broadcast (&connect_msg->header, GNUNET_NO);
662 * Function called to notify transport users that another
663 * peer disconnected from us.
666 * @param peer the peer that disconnected
669 neighbours_disconnect_notification (void *cls,
670 const struct GNUNET_PeerIdentity *peer)
672 struct DisconnectInfoMessage disconnect_msg;
675 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
676 "Peer `%s' disconnected and we are connected to %u peers\n",
677 GNUNET_i2s (peer), connections);
679 GST_manipulation_peer_disconnect (peer);
680 disconnect_msg.header.size = htons (sizeof (struct DisconnectInfoMessage));
681 disconnect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
682 disconnect_msg.reserved = htonl (0);
683 disconnect_msg.peer = *peer;
684 GST_clients_broadcast (&disconnect_msg.header, GNUNET_NO);
689 * Function called to notify transport users that a neighbour peer changed its
693 * @param peer peer this update is about (never NULL)
694 * @param address address, NULL on disconnect
697 neighbours_address_notification (void *cls,
698 const struct GNUNET_PeerIdentity *peer,
699 const struct GNUNET_HELLO_Address *address)
701 GST_clients_broadcast_address_notification (peer, address);
706 * Function called when the service shuts down. Unloads our plugins
707 * and cancels pending validations.
709 * @param cls closure, unused
710 * @param tc task context (unused)
713 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
715 GST_neighbours_stop ();
716 GST_validation_stop ();
717 GST_plugins_unload ();
719 GNUNET_ATS_scheduling_done (GST_ats);
722 GST_blacklist_stop ();
724 GST_manipulation_stop ();
726 if (NULL != GST_peerinfo)
728 GNUNET_PEERINFO_disconnect (GST_peerinfo);
731 if (NULL != GST_stats)
733 GNUNET_STATISTICS_destroy (GST_stats, GNUNET_NO);
736 if (NULL != GST_my_private_key)
738 GNUNET_free (GST_my_private_key);
739 GST_my_private_key = NULL;
746 * Initiate transport service.
749 * @param server the initialized server
750 * @param c configuration to use
753 run (void *cls, struct GNUNET_SERVER_Handle *server,
754 const struct GNUNET_CONFIGURATION_Handle *c)
757 struct GNUNET_CRYPTO_EddsaPrivateKey *pk;
758 long long unsigned int max_fd_cfg;
766 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
769 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
770 _("Transport service is lacking key configuration settings. Exiting.\n"));
771 GNUNET_SCHEDULER_shutdown ();
775 GNUNET_CONFIGURATION_get_value_time (c, "transport", "HELLO_EXPIRATION",
778 hello_expiration = GNUNET_CONSTANTS_HELLO_ADDRESS_EXPIRATION;
781 pk = GNUNET_CRYPTO_eddsa_key_create_from_file (keyfile);
782 GNUNET_free (keyfile);
783 GNUNET_assert (NULL != pk);
784 GST_my_private_key = pk;
786 GST_stats = GNUNET_STATISTICS_create ("transport", GST_cfg);
787 GST_peerinfo = GNUNET_PEERINFO_connect (GST_cfg);
788 GNUNET_CRYPTO_eddsa_key_get_public (GST_my_private_key,
789 &GST_my_identity.public_key);
790 GNUNET_assert (NULL != GST_my_private_key);
792 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
793 "My identity is `%4s'\n", GNUNET_i2s (&GST_my_identity));
795 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
797 if (NULL == GST_peerinfo)
799 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
800 _("Could not access PEERINFO service. Exiting.\n"));
801 GNUNET_SCHEDULER_shutdown ();
808 struct rlimit r_file;
809 if (0 == getrlimit (RLIMIT_NOFILE, &r_file))
811 max_fd_rlimit = r_file.rlim_cur;
812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
813 "Maximum number of open files was: %u/%u\n",
817 max_fd_rlimit = (9 * max_fd_rlimit) / 10; /* Keep 10% for rest of transport */
819 GNUNET_CONFIGURATION_get_value_number (GST_cfg, "transport", "MAX_FD", &max_fd_cfg);
821 if (max_fd_cfg > max_fd_rlimit)
824 max_fd = max_fd_rlimit;
825 if (max_fd < DEFAULT_MAX_FDS)
826 max_fd = DEFAULT_MAX_FDS;
828 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
829 "Limiting number of sockets to %u: validation %u, neighbors: %u\n",
830 max_fd, (max_fd / 3) , (max_fd / 3) * 2);
832 friend_only = GNUNET_CONFIGURATION_get_value_yesno(GST_cfg, "topology","FRIENDS-ONLY");
833 if (GNUNET_SYSERR == friend_only)
834 friend_only = GNUNET_NO; /* According to topology defaults */
835 /* start subsystems */
836 GST_hello_start (friend_only, &process_hello_update, NULL);
837 GNUNET_assert (NULL != GST_hello_get());
838 GST_blacklist_start (GST_server, GST_cfg, &GST_my_identity);
840 GNUNET_ATS_scheduling_init (GST_cfg, &ats_request_address_change, NULL);
841 GST_manipulation_init (GST_cfg);
842 GST_plugins_load (&GST_manipulation_recv,
843 &plugin_env_address_change_notification,
844 &plugin_env_session_start,
845 &plugin_env_session_end,
846 &plugin_env_address_to_type,
847 &plugin_env_update_metrics);
848 GST_neighbours_start (NULL,
849 &neighbours_connect_notification,
850 &neighbours_disconnect_notification,
851 &neighbours_address_notification,
853 GST_clients_start (GST_server);
854 GST_validation_start ((max_fd / 3));
859 * The main function for the transport service.
861 * @param argc number of arguments from the command line
862 * @param argv command line arguments
863 * @return 0 ok, 1 on error
866 main (int argc, char *const *argv)
869 GNUNET_SERVICE_run (argc, argv, "transport",
870 GNUNET_SERVICE_OPTION_NONE, &run, NULL)) ? 0 : 1;
873 /* end of file gnunet-service-transport.c */