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);
154 if (!GST_neighbours_test_connected (peer))
157 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
158 "Discarded %u bytes type %u payload from peer `%s'\n", msg_size,
159 ntohs (message->type), GNUNET_i2s (peer));
161 GNUNET_STATISTICS_update (GST_stats,
163 ("# bytes payload discarded due to not connected peer "),
164 msg_size, GNUNET_NO);
168 GST_ats_add_address ((struct GNUNET_HELLO_Address *) address, session);
170 if (do_forward != GNUNET_YES)
172 im = (struct InboundMessage *) buf;
173 im->header.size = htons (size);
174 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
176 memcpy (&im[1], message, ntohs (message->size));
178 GST_clients_broadcast (&im->header, GNUNET_YES);
185 * Function called by the transport for each received message.
186 * This function should also be called with "NULL" for the
187 * message to signal that the other peer disconnected.
189 * @param cls closure, const char* with the name of the plugin we received the message from
190 * @param peer (claimed) identity of the other peer
191 * @param message the message, NULL if we only care about
192 * learning about the delay until we should receive again -- FIXME!
193 * @param session identifier used for this session (NULL for plugins
194 * that do not offer bi-directional communication to the sender
195 * using the same "connection")
196 * @param sender_address binary address of the sender (if we established the
197 * connection or are otherwise sure of it; should be NULL
198 * for inbound TCP/UDP connections since it it not clear
199 * that we could establish ourselves a connection to that
200 * IP address and get the same system)
201 * @param sender_address_len number of bytes in sender_address
202 * @return how long the plugin should wait until receiving more data
203 * (plugins that do not support this, can ignore the return value)
205 struct GNUNET_TIME_Relative
206 GST_receive_callback (void *cls, const struct GNUNET_PeerIdentity *peer,
207 const struct GNUNET_MessageHeader *message,
208 struct Session *session,
209 const char *sender_address,
210 uint16_t sender_address_len)
212 const char *plugin_name = cls;
213 struct GNUNET_TIME_Relative ret;
214 struct GNUNET_HELLO_Address address;
217 address.peer = *peer;
218 address.address = sender_address;
219 address.address_length = sender_address_len;
220 address.transport_name = plugin_name;
221 ret = GNUNET_TIME_UNIT_ZERO;
224 type = ntohs (message->type);
225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received Message with type %u from peer `%s'\n", type, GNUNET_i2s (peer));
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 address
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 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"),
480 GNUNET_i2s (peer), address->transport_name, GST_plugins_a2s (address),
483 GNUNET_free(ats_new);
488 * Function that will be called to figure if an address is an loopback,
489 * LAN, WAN etc. address
492 * @param peer the peer
493 * @param address binary address
494 * @param address_len length of the address
495 * @param session the session
496 * @param ats the ats information to update
497 * @param ats_count the number of ats elements
500 plugin_env_update_metrics (void *cls,
501 const struct GNUNET_PeerIdentity *peer,
503 uint16_t address_len,
504 struct Session *session,
505 const struct GNUNET_ATS_Information *ats,
508 struct GNUNET_HELLO_Address haddress;
509 const char *plugin_name = cls;
511 if ((NULL == ats) || (0 == ats_count))
513 GNUNET_assert (NULL != GST_ats);
516 haddress.peer = *peer;
517 haddress.address = address;
518 haddress.address_length = address_len;
519 haddress.transport_name = plugin_name;
521 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Updating metrics for peer `%s' address %s session %p\n",
522 GNUNET_i2s (peer), GST_plugins_a2s(&haddress), session);
523 GST_ats_update_metrics (peer, &haddress, session, ats, ats_count);
527 * Plugin tells transport service about a new (inbound) session
530 * @param peer the peer
531 * @param plugin plugin name
532 * @param address address
533 * @param address_len address length
534 * @param session the new session
535 * @param ats ats information
536 * @param ats_count number of ats information
540 plugin_env_session_start (void *cls, const struct GNUNET_PeerIdentity *peer,
541 const char *plugin, const void *address, uint16_t address_len,
542 struct Session *session, const struct GNUNET_ATS_Information *ats,
545 struct GNUNET_HELLO_Address *addr;
562 addr = GNUNET_HELLO_address_allocate (peer, plugin, address, address_len);
563 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
564 "Notification from plugin `%s' about new session %p from peer `%s' address `%s'\n",
565 plugin, session, GNUNET_i2s (peer), GST_plugins_a2s (addr));
566 GST_ats_add_address (addr, session);
569 GST_ats_update_metrics (peer, addr, session, ats, ats_count);
574 * Function called by ATS to notify the callee that the
575 * assigned bandwidth or address for a given peer was changed. If the
576 * callback is called with address/bandwidth assignments of zero, the
577 * ATS disconnect function will still be called once the disconnect
581 * @param address address to use (for peer given in address)
582 * @param session session to use (if available)
583 * @param bandwidth_out assigned outbound bandwidth for the connection in NBO,
584 * 0 to disconnect from peer
585 * @param bandwidth_in assigned inbound bandwidth for the connection in NBO,
586 * 0 to disconnect from peer
587 * @param ats ATS information
588 * @param ats_count number of ATS elements
591 ats_request_address_change (void *cls,
592 const struct GNUNET_HELLO_Address *address,
593 struct Session *session,
594 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
595 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
596 const struct GNUNET_ATS_Information *ats,
599 uint32_t bw_in = ntohl (bandwidth_in.value__);
600 uint32_t bw_out = ntohl (bandwidth_out.value__);
602 /* ATS tells me to disconnect from peer */
603 if ((bw_in == 0) && (bw_out == 0))
605 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
606 "ATS tells me to disconnect from peer `%s'\n",
607 GNUNET_i2s (&address->peer));
608 GST_neighbours_force_disconnect (&address->peer);
611 GST_neighbours_switch_to_address (&address->peer, address, session, ats,
612 ats_count, bandwidth_in,
618 * Function called to notify transport users that another
619 * peer connected to us.
622 * @param peer the peer that connected
623 * @param bandwidth_in inbound bandwidth in NBO
624 * @param bandwidth_out outbound bandwidth in NBO
627 neighbours_connect_notification (void *cls,
628 const struct GNUNET_PeerIdentity *peer,
629 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
630 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
632 size_t len = sizeof (struct ConnectInfoMessage);
633 char buf[len] GNUNET_ALIGN;
634 struct ConnectInfoMessage *connect_msg = (struct ConnectInfoMessage *) buf;
637 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
638 "We are now connected to peer `%s' and %u peers in total\n",
639 GNUNET_i2s (peer), connections);
641 connect_msg->header.size = htons (sizeof (buf));
642 connect_msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
643 connect_msg->id = *peer;
644 connect_msg->quota_in = bandwidth_in;
645 connect_msg->quota_out = bandwidth_out;
646 GST_clients_broadcast (&connect_msg->header, GNUNET_NO);
651 * Function called to notify transport users that another
652 * peer disconnected from us.
655 * @param peer the peer that disconnected
658 neighbours_disconnect_notification (void *cls,
659 const struct GNUNET_PeerIdentity *peer)
661 struct DisconnectInfoMessage disconnect_msg;
664 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
665 "Peer `%s' disconnected and we are connected to %u peers\n",
666 GNUNET_i2s (peer), connections);
668 GST_manipulation_peer_disconnect (peer);
669 disconnect_msg.header.size = htons (sizeof (struct DisconnectInfoMessage));
670 disconnect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
671 disconnect_msg.reserved = htonl (0);
672 disconnect_msg.peer = *peer;
673 GST_clients_broadcast (&disconnect_msg.header, GNUNET_NO);
678 * Function called to notify transport users that a neighbour peer changed its
682 * @param peer peer this update is about (never NULL)
683 * @param address address, NULL on disconnect
686 neighbours_address_notification (void *cls,
687 const struct GNUNET_PeerIdentity *peer,
688 const struct GNUNET_HELLO_Address *address)
690 GST_clients_broadcast_address_notification (peer, address);
695 * Function called when the service shuts down. Unloads our plugins
696 * and cancels pending validations.
698 * @param cls closure, unused
699 * @param tc task context (unused)
702 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
704 GST_neighbours_stop ();
705 GST_validation_stop ();
706 GST_plugins_unload ();
708 GNUNET_ATS_scheduling_done (GST_ats);
711 GST_blacklist_stop ();
713 GST_manipulation_stop ();
715 if (NULL != GST_peerinfo)
717 GNUNET_PEERINFO_disconnect (GST_peerinfo);
720 if (NULL != GST_stats)
722 GNUNET_STATISTICS_destroy (GST_stats, GNUNET_NO);
725 if (NULL != GST_my_private_key)
727 GNUNET_free (GST_my_private_key);
728 GST_my_private_key = NULL;
735 * Initiate transport service.
738 * @param server the initialized server
739 * @param c configuration to use
742 run (void *cls, struct GNUNET_SERVER_Handle *server,
743 const struct GNUNET_CONFIGURATION_Handle *c)
746 struct GNUNET_CRYPTO_EddsaPrivateKey *pk;
747 long long unsigned int max_fd_cfg;
755 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
758 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
760 ("Transport service is lacking key configuration settings. Exiting.\n"));
761 GNUNET_SCHEDULER_shutdown ();
765 GNUNET_CONFIGURATION_get_value_time (c, "transport", "HELLO_EXPIRATION",
768 hello_expiration = GNUNET_CONSTANTS_HELLO_ADDRESS_EXPIRATION;
771 pk = GNUNET_CRYPTO_eddsa_key_create_from_file (keyfile);
772 GNUNET_free (keyfile);
773 GNUNET_assert (NULL != pk);
774 GST_my_private_key = pk;
776 GST_stats = GNUNET_STATISTICS_create ("transport", GST_cfg);
777 GST_peerinfo = GNUNET_PEERINFO_connect (GST_cfg);
778 GNUNET_CRYPTO_eddsa_key_get_public (GST_my_private_key,
779 &GST_my_identity.public_key);
780 GNUNET_assert (NULL != GST_my_private_key);
782 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
783 "My identity is `%4s'\n", GNUNET_i2s (&GST_my_identity));
785 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
787 if (NULL == GST_peerinfo)
789 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
790 _("Could not access PEERINFO service. Exiting.\n"));
791 GNUNET_SCHEDULER_shutdown ();
798 struct rlimit r_file;
799 if (0 == getrlimit (RLIMIT_NOFILE, &r_file))
801 max_fd_rlimit = r_file.rlim_cur;
802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
803 "Maximum number of open files was: %u/%u\n", r_file.rlim_cur,
806 max_fd_rlimit = (9 * max_fd_rlimit) / 10; /* Keep 10% for rest of transport */
808 GNUNET_CONFIGURATION_get_value_number (GST_cfg, "transport", "MAX_FD", &max_fd_cfg);
810 if (max_fd_cfg > max_fd_rlimit)
813 max_fd = max_fd_rlimit;
814 if (max_fd < DEFAULT_MAX_FDS)
815 max_fd = DEFAULT_MAX_FDS;
817 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
818 "Limiting number of sockets to %u: validation %u, neighbors: %u\n",
819 max_fd, (max_fd / 3) , (max_fd / 3) * 2);
821 friend_only = GNUNET_CONFIGURATION_get_value_yesno(GST_cfg, "topology","FRIENDS-ONLY");
822 if (GNUNET_SYSERR == friend_only)
823 friend_only = GNUNET_NO; /* According to topology defaults */
824 /* start subsystems */
825 GST_hello_start (friend_only, &process_hello_update, NULL);
826 GNUNET_assert (NULL != GST_hello_get());
827 GST_blacklist_start (GST_server, GST_cfg, &GST_my_identity);
829 GNUNET_ATS_scheduling_init (GST_cfg, &ats_request_address_change, NULL);
830 GST_manipulation_init (GST_cfg);
831 GST_plugins_load (&GST_manipulation_recv,
832 &plugin_env_address_change_notification,
833 &plugin_env_session_start,
834 &plugin_env_session_end,
835 &plugin_env_address_to_type,
836 &plugin_env_update_metrics);
837 GST_neighbours_start (NULL,
838 &neighbours_connect_notification,
839 &neighbours_disconnect_notification,
840 &neighbours_address_notification,
842 GST_clients_start (GST_server);
843 GST_validation_start ((max_fd / 3));
848 * The main function for the transport service.
850 * @param argc number of arguments from the command line
851 * @param argv command line arguments
852 * @return 0 ok, 1 on error
855 main (int argc, char *const *argv)
858 GNUNET_SERVICE_run (argc, argv, "transport",
859 GNUNET_SERVICE_OPTION_NONE, &run, NULL)) ? 0 : 1;
862 /* end of file gnunet-service-transport.c */