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);
234 case GNUNET_MESSAGE_TYPE_HELLO_LEGACY:
235 /* Legacy HELLO message, discard */
237 case GNUNET_MESSAGE_TYPE_HELLO:
238 GST_validation_handle_hello (message);
240 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
242 "Processing `%s' from `%s'\n", "PING",
244 NULL) ? GST_plugins_a2s (&address) : TRANSPORT_SESSION_INBOUND_STRING);
245 GST_validation_handle_ping (peer, message, &address, session);
247 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
249 "Processing `%s' from `%s'\n", "PONG",
251 NULL) ? GST_plugins_a2s (&address) : TRANSPORT_SESSION_INBOUND_STRING);
252 GST_validation_handle_pong (peer, message);
254 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT:
255 GST_neighbours_handle_connect (message, peer, &address, session);
257 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK:
258 GST_neighbours_handle_connect_ack (message, peer, &address, session);
260 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_ACK:
261 GST_neighbours_handle_session_ack (message, peer, &address, session);
263 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT:
264 GST_neighbours_handle_disconnect_message (peer, message);
266 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE:
267 GST_neighbours_keepalive (peer);
269 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE:
270 GST_neighbours_keepalive_response (peer);
273 /* should be payload */
274 GNUNET_STATISTICS_update (GST_stats,
276 ("# bytes payload received"),
277 ntohs (message->size), GNUNET_NO);
278 GST_neighbours_notify_payload (peer, &address, session, message);
279 ret = process_payload (peer, &address, session, message);
283 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
284 "Allowing receive from peer %s to continue in %s\n",
286 GNUNET_STRINGS_relative_time_to_string (ret, GNUNET_YES));
292 * Function that will be called for each address the transport
293 * is aware that it might be reachable under. Update our HELLO.
295 * @param cls name of the plugin (const char*)
296 * @param add_remove should the address added (YES) or removed (NO) from the
297 * set of valid addresses?
298 * @param addr one of the addresses of the host
299 * the specific address format depends on the transport
300 * @param addrlen length of the address
301 * @param dest_plugin destination plugin to use this address with
304 plugin_env_address_change_notification (void *cls, int add_remove,
305 const void *addr, size_t addrlen,
306 const char *dest_plugin)
308 struct GNUNET_HELLO_Address address;
310 address.peer = GST_my_identity;
311 address.transport_name = dest_plugin;
312 address.address = addr;
313 address.address_length = addrlen;
314 GST_hello_modify_addresses (add_remove, &address);
319 * Function that will be called whenever the plugin internally
320 * cleans up a session pointer and hence the service needs to
321 * discard all of those sessions as well. Plugins that do not
322 * use sessions can simply omit calling this function and always
323 * use NULL wherever a session pointer is needed. This function
324 * should be called BEFORE a potential "TransmitContinuation"
325 * from the "TransmitFunction".
328 * @param peer which peer was the session for
329 * @param session which session is being destoyed
332 plugin_env_session_end (void *cls, const struct GNUNET_PeerIdentity *peer,
333 struct Session *session)
335 const char *transport_name = cls;
336 struct GNUNET_HELLO_Address address;
338 GNUNET_assert (strlen (transport_name) > 0);
339 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Session %p to peer `%s' ended \n",
340 session, GNUNET_i2s (peer));
342 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
344 "Telling ATS to destroy session %p from peer %s\n",
345 session, GNUNET_i2s (peer));
346 address.peer = *peer;
347 address.address = NULL;
348 address.address_length = 0;
349 address.transport_name = transport_name;
350 GST_neighbours_session_terminated (peer, session);
352 /* Tell ATS that session has ended */
353 GNUNET_ATS_address_destroyed (GST_ats, &address, session);
358 * Function that will be called to figure if an address is an loopback,
359 * LAN, WAN etc. address
362 * @param addr binary address
363 * @param addrlen length of the address
364 * @return ATS Information containing the network type
366 static struct GNUNET_ATS_Information
367 plugin_env_address_to_type (void *cls,
368 const struct sockaddr *addr,
371 struct GNUNET_ATS_Information ats;
372 ats.type = htonl (GNUNET_ATS_NETWORK_TYPE);
373 ats.value = htonl (GNUNET_ATS_NET_UNSPECIFIED);
379 if (((addr->sa_family != AF_INET) && (addrlen != sizeof (struct sockaddr_in))) &&
380 ((addr->sa_family != AF_INET6) && (addrlen != sizeof (struct sockaddr_in6))) &&
381 (addr->sa_family != AF_UNIX))
383 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Malformed address with length %u `%s'\n",
385 GNUNET_a2s(addr, addrlen));
389 return GNUNET_ATS_address_get_type(GST_ats, addr, addrlen);
394 * Notify ATS about the new address including the network this address is
397 * @param address the address
398 * @param session the session
401 GST_ats_add_address (const struct GNUNET_HELLO_Address *address,
402 struct Session *session)
404 struct GNUNET_TRANSPORT_PluginFunctions *papi;
405 struct GNUNET_ATS_Information ats;
408 /* valid new address, let ATS know! */
409 if (NULL == address->transport_name)
414 if (NULL == (papi = GST_plugins_find (address->transport_name)))
416 /* we don't have the plugin for this address */
421 if (GNUNET_YES == GNUNET_ATS_session_known (GST_ats, address, session))
424 net = papi->get_network (NULL, (void *) session);
425 if (GNUNET_ATS_NET_UNSPECIFIED == net)
427 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
428 _("Could not obtain a valid network for `%s' %s\n"),
429 GNUNET_i2s (&address->peer), GST_plugins_a2s (address));
432 ats.type = htonl (GNUNET_ATS_NETWORK_TYPE);
433 ats.value = htonl(net);
434 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
435 "Notifying ATS about peer `%s''s new address `%s' session %p in network %s\n",
436 GNUNET_i2s (&address->peer),
437 (0 == address->address_length) ? "<inbound>" : GST_plugins_a2s (address),
439 GNUNET_ATS_print_network_type(net));
440 GNUNET_ATS_address_add (GST_ats,
441 address, session, &ats, 1);
446 * Notify ATS about property changes to an address
448 * @param peer the peer
449 * @param address the address
450 * @param session the session
451 * @param ats performance information
452 * @param ats_count number of elements in ats
455 GST_ats_update_metrics (const struct GNUNET_PeerIdentity *peer,
456 const struct GNUNET_HELLO_Address *address,
457 struct Session *session,
458 const struct GNUNET_ATS_Information *ats,
461 struct GNUNET_ATS_Information *ats_new;
463 if (GNUNET_NO == GNUNET_ATS_session_known (GST_ats, address, session))
466 /* Call to manipulation to manipulate ATS information */
467 ats_new = GST_manipulation_manipulate_metrics (peer, address, session, ats,
474 if (GNUNET_NO == GNUNET_ATS_address_update (GST_ats,
475 address, session, ats_new, ats_count))
477 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
478 _("Address or session unknown: failed to update properties for peer `%s' plugin `%s' address `%s' session %p\n"),
479 GNUNET_i2s (peer), address->transport_name, GST_plugins_a2s (address),
482 GNUNET_free(ats_new);
487 * Function that will be called to figure if an address is an loopback,
488 * LAN, WAN etc. address
491 * @param peer the peer
492 * @param address binary address
493 * @param address_len length of the address
494 * @param session the session
495 * @param ats the ats information to update
496 * @param ats_count the number of ats elements
499 plugin_env_update_metrics (void *cls,
500 const struct GNUNET_PeerIdentity *peer,
502 uint16_t address_len,
503 struct Session *session,
504 const struct GNUNET_ATS_Information *ats,
507 struct GNUNET_HELLO_Address haddress;
508 const char *plugin_name = cls;
510 if ((NULL == ats) || (0 == ats_count))
512 GNUNET_assert (NULL != GST_ats);
515 haddress.peer = *peer;
516 haddress.address = address;
517 haddress.address_length = address_len;
518 haddress.transport_name = plugin_name;
520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Updating metrics for peer `%s' address %s session %p\n",
521 GNUNET_i2s (peer), GST_plugins_a2s(&haddress), session);
522 GST_ats_update_metrics (peer, &haddress, session, ats, ats_count);
526 * Plugin tells transport service about a new (inbound) session
529 * @param peer the peer
530 * @param plugin plugin name
531 * @param address address
532 * @param address_len address length
533 * @param session the new session
534 * @param ats ats information
535 * @param ats_count number of ats information
539 plugin_env_session_start (void *cls, const struct GNUNET_PeerIdentity *peer,
540 const char *plugin, const void *address, uint16_t address_len,
541 struct Session *session, const struct GNUNET_ATS_Information *ats,
544 struct GNUNET_HELLO_Address *addr;
561 addr = GNUNET_HELLO_address_allocate (peer, plugin, address, address_len);
562 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
563 "Notification from plugin `%s' about new session %p from peer `%s' address `%s'\n",
564 plugin, session, GNUNET_i2s (peer), GST_plugins_a2s (addr));
565 GST_ats_add_address (addr, session);
568 GST_ats_update_metrics (peer, addr, session, ats, ats_count);
573 * Function called by ATS to notify the callee that the
574 * assigned bandwidth or address for a given peer was changed. If the
575 * callback is called with address/bandwidth assignments of zero, the
576 * ATS disconnect function will still be called once the disconnect
580 * @param address address to use (for peer given in address)
581 * @param session session to use (if available)
582 * @param bandwidth_out assigned outbound bandwidth for the connection in NBO,
583 * 0 to disconnect from peer
584 * @param bandwidth_in assigned inbound bandwidth for the connection in NBO,
585 * 0 to disconnect from peer
586 * @param ats ATS information
587 * @param ats_count number of ATS elements
590 ats_request_address_change (void *cls,
591 const struct GNUNET_HELLO_Address *address,
592 struct Session *session,
593 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
594 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
595 const struct GNUNET_ATS_Information *ats,
598 uint32_t bw_in = ntohl (bandwidth_in.value__);
599 uint32_t bw_out = ntohl (bandwidth_out.value__);
601 /* ATS tells me to disconnect from peer */
602 if ((bw_in == 0) && (bw_out == 0))
604 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
605 "ATS tells me to disconnect from peer `%s'\n",
606 GNUNET_i2s (&address->peer));
607 GST_neighbours_force_disconnect (&address->peer);
610 GST_neighbours_switch_to_address (&address->peer, address, session, ats,
611 ats_count, bandwidth_in,
617 * Function called to notify transport users that another
618 * peer connected to us.
621 * @param peer the peer that connected
622 * @param bandwidth_in inbound bandwidth in NBO
623 * @param bandwidth_out outbound bandwidth in NBO
626 neighbours_connect_notification (void *cls,
627 const struct GNUNET_PeerIdentity *peer,
628 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
629 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
631 size_t len = sizeof (struct ConnectInfoMessage);
632 char buf[len] GNUNET_ALIGN;
633 struct ConnectInfoMessage *connect_msg = (struct ConnectInfoMessage *) buf;
636 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
637 "We are now connected to peer `%s' and %u peers in total\n",
638 GNUNET_i2s (peer), connections);
640 connect_msg->header.size = htons (sizeof (buf));
641 connect_msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
642 connect_msg->id = *peer;
643 connect_msg->quota_in = bandwidth_in;
644 connect_msg->quota_out = bandwidth_out;
645 GST_clients_broadcast (&connect_msg->header, GNUNET_NO);
650 * Function called to notify transport users that another
651 * peer disconnected from us.
654 * @param peer the peer that disconnected
657 neighbours_disconnect_notification (void *cls,
658 const struct GNUNET_PeerIdentity *peer)
660 struct DisconnectInfoMessage disconnect_msg;
663 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
664 "Peer `%s' disconnected and we are connected to %u peers\n",
665 GNUNET_i2s (peer), connections);
667 GST_manipulation_peer_disconnect (peer);
668 disconnect_msg.header.size = htons (sizeof (struct DisconnectInfoMessage));
669 disconnect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
670 disconnect_msg.reserved = htonl (0);
671 disconnect_msg.peer = *peer;
672 GST_clients_broadcast (&disconnect_msg.header, GNUNET_NO);
677 * Function called to notify transport users that a neighbour peer changed its
681 * @param peer peer this update is about (never NULL)
682 * @param address address, NULL on disconnect
685 neighbours_address_notification (void *cls,
686 const struct GNUNET_PeerIdentity *peer,
687 const struct GNUNET_HELLO_Address *address)
689 GST_clients_broadcast_address_notification (peer, address);
694 * Function called when the service shuts down. Unloads our plugins
695 * and cancels pending validations.
697 * @param cls closure, unused
698 * @param tc task context (unused)
701 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
703 GST_neighbours_stop ();
704 GST_validation_stop ();
705 GST_plugins_unload ();
707 GNUNET_ATS_scheduling_done (GST_ats);
710 GST_blacklist_stop ();
712 GST_manipulation_stop ();
714 if (NULL != GST_peerinfo)
716 GNUNET_PEERINFO_disconnect (GST_peerinfo);
719 if (NULL != GST_stats)
721 GNUNET_STATISTICS_destroy (GST_stats, GNUNET_NO);
724 if (NULL != GST_my_private_key)
726 GNUNET_free (GST_my_private_key);
727 GST_my_private_key = NULL;
734 * Initiate transport service.
737 * @param server the initialized server
738 * @param c configuration to use
741 run (void *cls, struct GNUNET_SERVER_Handle *server,
742 const struct GNUNET_CONFIGURATION_Handle *c)
745 struct GNUNET_CRYPTO_EddsaPrivateKey *pk;
746 long long unsigned int max_fd_cfg;
754 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
757 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
759 ("Transport service is lacking key configuration settings. Exiting.\n"));
760 GNUNET_SCHEDULER_shutdown ();
764 GNUNET_CONFIGURATION_get_value_time (c, "transport", "HELLO_EXPIRATION",
767 hello_expiration = GNUNET_CONSTANTS_HELLO_ADDRESS_EXPIRATION;
770 pk = GNUNET_CRYPTO_eddsa_key_create_from_file (keyfile);
771 GNUNET_free (keyfile);
772 GNUNET_assert (NULL != pk);
773 GST_my_private_key = pk;
775 GST_stats = GNUNET_STATISTICS_create ("transport", GST_cfg);
776 GST_peerinfo = GNUNET_PEERINFO_connect (GST_cfg);
777 GNUNET_CRYPTO_eddsa_key_get_public (GST_my_private_key,
778 &GST_my_identity.public_key);
779 GNUNET_assert (NULL != GST_my_private_key);
781 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
782 "My identity is `%4s'\n", GNUNET_i2s (&GST_my_identity));
784 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
786 if (NULL == GST_peerinfo)
788 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
789 _("Could not access PEERINFO service. Exiting.\n"));
790 GNUNET_SCHEDULER_shutdown ();
797 struct rlimit r_file;
798 if (0 == getrlimit (RLIMIT_NOFILE, &r_file))
800 max_fd_rlimit = r_file.rlim_cur;
801 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
802 "Maximum number of open files was: %u/%u\n", r_file.rlim_cur,
805 max_fd_rlimit = (9 * max_fd_rlimit) / 10; /* Keep 10% for rest of transport */
807 GNUNET_CONFIGURATION_get_value_number (GST_cfg, "transport", "MAX_FD", &max_fd_cfg);
809 if (max_fd_cfg > max_fd_rlimit)
812 max_fd = max_fd_rlimit;
813 if (max_fd < DEFAULT_MAX_FDS)
814 max_fd = DEFAULT_MAX_FDS;
816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
817 "Limiting number of sockets to %u: validation %u, neighbors: %u\n",
818 max_fd, (max_fd / 3) , (max_fd / 3) * 2);
820 friend_only = GNUNET_CONFIGURATION_get_value_yesno(GST_cfg, "topology","FRIENDS-ONLY");
821 if (GNUNET_SYSERR == friend_only)
822 friend_only = GNUNET_NO; /* According to topology defaults */
823 /* start subsystems */
824 GST_hello_start (friend_only, &process_hello_update, NULL);
825 GNUNET_assert (NULL != GST_hello_get());
826 GST_blacklist_start (GST_server, GST_cfg, &GST_my_identity);
828 GNUNET_ATS_scheduling_init (GST_cfg, &ats_request_address_change, NULL);
829 GST_manipulation_init (GST_cfg);
830 GST_plugins_load (&GST_manipulation_recv,
831 &plugin_env_address_change_notification,
832 &plugin_env_session_start,
833 &plugin_env_session_end,
834 &plugin_env_address_to_type,
835 &plugin_env_update_metrics);
836 GST_neighbours_start (NULL,
837 &neighbours_connect_notification,
838 &neighbours_disconnect_notification,
839 &neighbours_address_notification,
841 GST_clients_start (GST_server);
842 GST_validation_start ((max_fd / 3));
847 * The main function for the transport service.
849 * @param argc number of arguments from the command line
850 * @param argv command line arguments
851 * @return 0 ok, 1 on error
854 main (int argc, char *const *argv)
857 GNUNET_SERVICE_run (argc, argv, "transport",
858 GNUNET_SERVICE_OPTION_NONE, &run, NULL)) ? 0 : 1;
861 /* end of file gnunet-service-transport.c */