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.
10 GNUnet is distributed in the hope that it will be useful, but
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"
45 * Information we need for an asynchronous session kill.
52 struct SessionKiller *next;
57 struct SessionKiller *prev;
62 struct Session *session;
65 * Plugin for the session.
67 struct GNUNET_TRANSPORT_PluginFunctions *plugin;
72 GNUNET_SCHEDULER_TaskIdentifier task;
81 struct GNUNET_STATISTICS_Handle *GST_stats;
84 * Configuration handle.
86 const struct GNUNET_CONFIGURATION_Handle *GST_cfg;
89 * Configuration handle.
91 struct GNUNET_PeerIdentity GST_my_identity;
94 * Handle to peerinfo service.
96 struct GNUNET_PEERINFO_Handle *GST_peerinfo;
99 * Handle to our service's server.
101 static struct GNUNET_SERVER_Handle *GST_server;
106 struct GNUNET_CRYPTO_EddsaPrivateKey *GST_my_private_key;
111 struct GNUNET_ATS_SchedulingHandle *GST_ats;
114 * Hello address expiration
116 struct GNUNET_TIME_Relative hello_expiration;
119 * DEBUGGING connection counter
121 static int connections;
124 * Head of DLL of asynchronous tasks to kill sessions.
126 static struct SessionKiller *sk_head;
129 * Tail of DLL of asynchronous tasks to kill sessions.
131 static struct SessionKiller *sk_tail;
135 * Transmit our HELLO message to the given (connected) neighbour.
137 * @param cls the 'HELLO' message
138 * @param target a connected neighbour
139 * @param address the address
140 * @param bandwidth_in inbound quota in NBO
141 * @param bandwidth_out outbound quota in NBO
144 transmit_our_hello (void *cls, const struct GNUNET_PeerIdentity *target,
145 const struct GNUNET_HELLO_Address *address,
146 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
147 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
149 const struct GNUNET_MessageHeader *hello = cls;
151 GST_neighbours_send (target, (const char *) hello, ntohs (hello->size),
152 hello_expiration, NULL, NULL);
157 * My HELLO has changed. Tell everyone who should know.
160 * @param hello new HELLO
163 process_hello_update (void *cls, const struct GNUNET_MessageHeader *hello)
165 GST_clients_broadcast (hello, GNUNET_NO);
166 GST_neighbours_iterate (&transmit_our_hello, (void *) hello);
171 * We received some payload. Prepare to pass it on to our clients.
173 * @param peer (claimed) identity of the other peer
174 * @param address the address
175 * @param session session used
176 * @param message the message to process
177 * @return how long the plugin should wait until receiving more data
179 static struct GNUNET_TIME_Relative
180 process_payload (const struct GNUNET_PeerIdentity *peer,
181 const struct GNUNET_HELLO_Address *address,
182 struct Session *session,
183 const struct GNUNET_MessageHeader *message)
185 struct GNUNET_TIME_Relative ret;
187 struct InboundMessage *im;
188 size_t msg_size = ntohs (message->size);
190 sizeof (struct InboundMessage) + msg_size;
191 char buf[size] GNUNET_ALIGN;
193 do_forward = GNUNET_SYSERR;
194 ret = GST_neighbours_calculate_receive_delay (peer, msg_size, &do_forward);
195 if (! GST_neighbours_test_connected (peer))
197 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
198 "Discarded %u bytes type %u payload from peer `%s'\n",
200 ntohs (message->type), GNUNET_i2s (peer));
201 GNUNET_STATISTICS_update (GST_stats,
203 ("# bytes payload discarded due to not connected peer"),
204 msg_size, GNUNET_NO);
208 GST_ats_add_address (address, session);
210 if (GNUNET_YES != do_forward)
212 im = (struct InboundMessage *) buf;
213 im->header.size = htons (size);
214 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
216 memcpy (&im[1], message, ntohs (message->size));
217 GST_clients_broadcast (&im->header, GNUNET_YES);
223 * Task to asynchronously terminate a session.
225 * @param cls the `struct SessionKiller` with the information for the kill
226 * @param tc scheduler context
229 kill_session_task (void *cls,
230 const struct GNUNET_SCHEDULER_TaskContext *tc)
232 struct SessionKiller *sk = cls;
234 sk->task = GNUNET_SCHEDULER_NO_TASK;
235 GNUNET_CONTAINER_DLL_remove (sk_head, sk_tail, sk);
236 sk->plugin->disconnect_session (sk->plugin->cls,
243 * Force plugin to terminate session due to communication
246 * @param plugin_name name of the plugin
247 * @param session session to termiante
250 kill_session (const char *plugin_name,
251 struct Session *session)
253 struct GNUNET_TRANSPORT_PluginFunctions *plugin;
254 struct SessionKiller *sk;
256 for (sk = sk_head; NULL != sk; sk = sk->next)
257 if (sk->session == session)
259 plugin = GST_plugins_find (plugin_name);
265 /* need to issue disconnect asynchronously */
266 sk = GNUNET_new (struct SessionKiller);
267 sk->session = session;
269 sk->task = GNUNET_SCHEDULER_add_now (&kill_session_task,
271 GNUNET_CONTAINER_DLL_insert (sk_head, sk_tail, sk);
276 * Function called by the transport for each received message.
278 * @param cls closure, const char* with the name of the plugin we received the message from
279 * @param peer (claimed) identity of the other peer
280 * @param message the message, NULL if we only care about
281 * learning about the delay until we should receive again
282 * @param session identifier used for this session (NULL for plugins
283 * that do not offer bi-directional communication to the sender
284 * using the same "connection")
285 * @param sender_address binary address of the sender (if we established the
286 * connection or are otherwise sure of it; should be NULL
287 * for inbound TCP/UDP connections since it it not clear
288 * that we could establish ourselves a connection to that
289 * IP address and get the same system)
290 * @param sender_address_len number of bytes in @a sender_address
291 * @return how long the plugin should wait until receiving more data
292 * (plugins that do not support this, can ignore the return value)
294 struct GNUNET_TIME_Relative
295 GST_receive_callback (void *cls,
296 const struct GNUNET_PeerIdentity *peer,
297 const struct GNUNET_MessageHeader *message,
298 struct Session *session,
299 const char *sender_address,
300 uint16_t sender_address_len)
302 const char *plugin_name = cls;
303 struct GNUNET_TIME_Relative ret;
304 struct GNUNET_HELLO_Address address;
307 address.peer = *peer;
308 address.address = sender_address;
309 address.address_length = sender_address_len;
310 address.transport_name = plugin_name;
311 ret = GNUNET_TIME_UNIT_ZERO;
314 type = ntohs (message->type);
315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
316 "Received Message with type %u from peer `%s'\n",
320 GNUNET_STATISTICS_update (GST_stats,
322 ("# bytes total received"),
323 ntohs (message->size), GNUNET_NO);
324 GST_neighbours_notify_data_recv (peer, &address, session, message);
328 case GNUNET_MESSAGE_TYPE_HELLO_LEGACY:
329 /* Legacy HELLO message, discard */
331 case GNUNET_MESSAGE_TYPE_HELLO:
333 GST_validation_handle_hello (message))
336 kill_session (plugin_name, session);
339 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
340 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
341 "Processing `%s' from `%s'\n", "PING",
343 NULL) ? GST_plugins_a2s (&address) : TRANSPORT_SESSION_INBOUND_STRING);
345 GST_validation_handle_ping (peer, message, &address, session))
346 kill_session (plugin_name, session);
348 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
349 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
350 "Processing `%s' from `%s'\n", "PONG",
352 NULL) ? GST_plugins_a2s (&address) : TRANSPORT_SESSION_INBOUND_STRING);
354 GST_validation_handle_pong (peer, message))
357 kill_session (plugin_name, session);
360 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT:
362 GST_neighbours_handle_connect (message, peer, &address, session))
365 kill_session (plugin_name, session);
368 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK:
370 GST_neighbours_handle_connect_ack (message, peer, &address, session))
372 kill_session (plugin_name, session);
375 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_ACK:
377 GST_neighbours_handle_session_ack (message, peer, &address, session))
380 kill_session (plugin_name, session);
383 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT:
384 GST_neighbours_handle_disconnect_message (peer, message);
386 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE:
387 GST_neighbours_keepalive (peer, message);
389 case GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE:
390 GST_neighbours_keepalive_response (peer, message);
393 /* should be payload */
394 GNUNET_STATISTICS_update (GST_stats,
396 ("# bytes payload received"),
397 ntohs (message->size), GNUNET_NO);
398 GST_neighbours_notify_payload_recv (peer, &address, session, message);
399 ret = process_payload (peer, &address, session, message);
403 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
404 "Allowing receive from peer %s to continue in %s\n",
406 GNUNET_STRINGS_relative_time_to_string (ret, GNUNET_YES));
412 * Function that will be called for each address the transport
413 * is aware that it might be reachable under. Update our HELLO.
415 * @param cls name of the plugin (const char*)
416 * @param add_remove should the address added (YES) or removed (NO) from the
417 * set of valid addresses?
418 * @param addr one of the addresses of the host
419 * the specific address format depends on the transport
420 * @param addrlen length of the @a addr
421 * @param dest_plugin destination plugin to use this address with
424 plugin_env_address_change_notification (void *cls, int add_remove,
425 const void *addr, size_t addrlen,
426 const char *dest_plugin)
428 struct GNUNET_HELLO_Address address;
430 address.peer = GST_my_identity;
431 address.transport_name = dest_plugin;
432 address.address = addr;
433 address.address_length = addrlen;
434 GST_hello_modify_addresses (add_remove, &address);
439 * Function that will be called whenever the plugin internally
440 * cleans up a session pointer and hence the service needs to
441 * discard all of those sessions as well. Plugins that do not
442 * use sessions can simply omit calling this function and always
443 * use NULL wherever a session pointer is needed. This function
444 * should be called BEFORE a potential "TransmitContinuation"
445 * from the "TransmitFunction".
448 * @param peer which peer was the session for
449 * @param session which session is being destoyed
452 plugin_env_session_end (void *cls, const struct GNUNET_PeerIdentity *peer,
453 struct Session *session)
455 const char *transport_name = cls;
456 struct GNUNET_HELLO_Address address;
457 struct SessionKiller *sk;
459 GNUNET_assert (strlen (transport_name) > 0);
460 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
461 "Session %p to peer `%s' ended \n",
465 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
467 "Telling ATS to destroy session %p from peer %s\n",
468 session, GNUNET_i2s (peer));
469 address.peer = *peer;
470 address.address = NULL;
471 address.address_length = 0;
472 address.transport_name = transport_name;
473 GST_neighbours_session_terminated (peer, session);
475 /* Tell ATS that session has ended */
476 GNUNET_ATS_address_destroyed (GST_ats, &address, session);
477 for (sk = sk_head; NULL != sk; sk = sk->next)
479 if (sk->session == session)
481 GNUNET_CONTAINER_DLL_remove (sk_head, sk_tail, sk);
482 GNUNET_SCHEDULER_cancel (sk->task);
491 * Function that will be called to figure if an address is an loopback,
492 * LAN, WAN etc. address
495 * @param addr binary address
496 * @param addrlen length of the address
497 * @return ATS Information containing the network type
499 static struct GNUNET_ATS_Information
500 plugin_env_address_to_type (void *cls,
501 const struct sockaddr *addr,
504 struct GNUNET_ATS_Information ats;
506 ats.type = htonl (GNUNET_ATS_NETWORK_TYPE);
507 ats.value = htonl (GNUNET_ATS_NET_UNSPECIFIED);
513 if (((addr->sa_family != AF_INET) && (addrlen != sizeof (struct sockaddr_in))) &&
514 ((addr->sa_family != AF_INET6) && (addrlen != sizeof (struct sockaddr_in6))) &&
515 (addr->sa_family != AF_UNIX))
517 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
518 "Malformed address with length %u `%s'\n",
520 GNUNET_a2s (addr, addrlen));
524 return GNUNET_ATS_address_get_type (GST_ats, addr, addrlen);
529 * Notify ATS about the new address including the network this address is
532 * @param address the address
533 * @param session the session
536 GST_ats_add_address (const struct GNUNET_HELLO_Address *address,
537 struct Session *session)
539 struct GNUNET_TRANSPORT_PluginFunctions *papi;
540 struct GNUNET_ATS_Information ats;
543 /* valid new address, let ATS know! */
544 if (NULL == address->transport_name)
549 if (NULL == (papi = GST_plugins_find (address->transport_name)))
551 /* we don't have the plugin for this address */
556 if (GNUNET_YES == GNUNET_ATS_session_known (GST_ats, address, session))
559 net = papi->get_network (NULL, session);
560 if (GNUNET_ATS_NET_UNSPECIFIED == net)
562 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
563 _("Could not obtain a valid network for `%s' %s (%s)\n"),
564 GNUNET_i2s (&address->peer),
565 GST_plugins_a2s (address),
566 address->transport_name);
569 ats.type = htonl (GNUNET_ATS_NETWORK_TYPE);
570 ats.value = htonl(net);
571 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
572 "Notifying ATS about peer `%s''s new address `%s' session %p in network %s\n",
573 GNUNET_i2s (&address->peer),
574 (0 == address->address_length) ? "<inbound>" : GST_plugins_a2s (address),
576 GNUNET_ATS_print_network_type(net));
577 GNUNET_ATS_address_add (GST_ats,
578 address, session, &ats, 1);
583 * Notify ATS about property changes to an address
585 * @param peer the peer
586 * @param address the address
587 * @param session the session
588 * @param ats performance information
589 * @param ats_count number of elements in @a ats
592 GST_ats_update_metrics (const struct GNUNET_PeerIdentity *peer,
593 const struct GNUNET_HELLO_Address *address,
594 struct Session *session,
595 const struct GNUNET_ATS_Information *ats,
598 struct GNUNET_ATS_Information *ats_new;
600 if (GNUNET_NO == GNUNET_ATS_session_known (GST_ats, address, session))
603 /* Call to manipulation to manipulate ATS information */
604 ats_new = GST_manipulation_manipulate_metrics (peer, address, session, ats,
611 if (GNUNET_NO == GNUNET_ATS_address_update (GST_ats,
612 address, session, ats_new, ats_count))
614 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
615 _("Address or session unknown: failed to update properties for peer `%s' plugin `%s' address `%s' session %p\n"),
617 address->transport_name,
618 GST_plugins_a2s (address),
621 GNUNET_free (ats_new);
626 * Function that will be called to figure if an address is an loopback,
627 * LAN, WAN etc. address
630 * @param peer the peer
631 * @param address binary address
632 * @param address_len length of the @a address
633 * @param session the session
634 * @param ats the ats information to update
635 * @param ats_count the number of @a ats elements
638 plugin_env_update_metrics (void *cls,
639 const struct GNUNET_PeerIdentity *peer,
641 uint16_t address_len,
642 struct Session *session,
643 const struct GNUNET_ATS_Information *ats,
646 const char *plugin_name = cls;
647 struct GNUNET_HELLO_Address haddress;
649 if ((NULL == ats) || (0 == ats_count))
651 GNUNET_assert (NULL != GST_ats);
653 haddress.peer = *peer;
654 haddress.address = address;
655 haddress.address_length = address_len;
656 haddress.transport_name = plugin_name;
658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
659 "Updating metrics for peer `%s' address %s session %p\n",
661 GST_plugins_a2s (&haddress),
663 GST_ats_update_metrics (peer, &haddress, session, ats, ats_count);
668 * Plugin tells transport service about a new (inbound) session
671 * @param peer the peer
672 * @param plugin plugin name
673 * @param address address
674 * @param address_len @a address length
675 * @param session the new session
676 * @param ats ats information
677 * @param ats_count number of @a ats information
680 plugin_env_session_start (void *cls,
681 const struct GNUNET_PeerIdentity *peer,
683 const void *address, uint16_t address_len,
684 struct Session *session,
685 const struct GNUNET_ATS_Information *ats,
688 struct GNUNET_HELLO_Address *addr;
706 addr = GNUNET_HELLO_address_allocate (peer, plugin, address, address_len);
707 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
708 "Notification from plugin `%s' about new session %p from peer `%s' address `%s'\n",
712 GST_plugins_a2s (addr));
713 GST_ats_add_address (addr, session);
716 GST_ats_update_metrics (peer, addr, session, ats, ats_count);
722 * Function called by ATS to notify the callee that the
723 * assigned bandwidth or address for a given peer was changed. If the
724 * callback is called with address/bandwidth assignments of zero, the
725 * ATS disconnect function will still be called once the disconnect
729 * @param address address to use (for peer given in address)
730 * @param session session to use (if available)
731 * @param bandwidth_out assigned outbound bandwidth for the connection in NBO,
732 * 0 to disconnect from peer
733 * @param bandwidth_in assigned inbound bandwidth for the connection in NBO,
734 * 0 to disconnect from peer
735 * @param ats ATS information
736 * @param ats_count number of @a ats elements
739 ats_request_address_change (void *cls,
740 const struct GNUNET_HELLO_Address *address,
741 struct Session *session,
742 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
743 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
744 const struct GNUNET_ATS_Information *ats,
747 uint32_t bw_in = ntohl (bandwidth_in.value__);
748 uint32_t bw_out = ntohl (bandwidth_out.value__);
750 /* ATS tells me to disconnect from peer */
751 if ((bw_in == 0) && (bw_out == 0))
753 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
754 "ATS tells me to disconnect from peer `%s'\n",
755 GNUNET_i2s (&address->peer));
756 GST_neighbours_force_disconnect (&address->peer);
759 GST_neighbours_switch_to_address (&address->peer, address, session, ats,
760 ats_count, bandwidth_in,
766 * Function called to notify transport users that another
767 * peer connected to us.
770 * @param peer the peer that connected
771 * @param bandwidth_in inbound bandwidth in NBO
772 * @param bandwidth_out outbound bandwidth in NBO
775 neighbours_connect_notification (void *cls,
776 const struct GNUNET_PeerIdentity *peer,
777 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
778 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
780 size_t len = sizeof (struct ConnectInfoMessage);
781 char buf[len] GNUNET_ALIGN;
782 struct ConnectInfoMessage *connect_msg = (struct ConnectInfoMessage *) buf;
785 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
786 "We are now connected to peer `%s' and %u peers in total\n",
787 GNUNET_i2s (peer), connections);
788 connect_msg->header.size = htons (sizeof (buf));
789 connect_msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
790 connect_msg->id = *peer;
791 connect_msg->quota_in = bandwidth_in;
792 connect_msg->quota_out = bandwidth_out;
793 GST_clients_broadcast (&connect_msg->header, GNUNET_NO);
798 * Function called to notify transport users that another
799 * peer disconnected from us.
802 * @param peer the peer that disconnected
805 neighbours_disconnect_notification (void *cls,
806 const struct GNUNET_PeerIdentity *peer)
808 struct DisconnectInfoMessage disconnect_msg;
811 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
812 "Peer `%s' disconnected and we are connected to %u peers\n",
813 GNUNET_i2s (peer), connections);
815 GST_manipulation_peer_disconnect (peer);
816 disconnect_msg.header.size = htons (sizeof (struct DisconnectInfoMessage));
817 disconnect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
818 disconnect_msg.reserved = htonl (0);
819 disconnect_msg.peer = *peer;
820 GST_clients_broadcast (&disconnect_msg.header, GNUNET_NO);
825 * Function called to notify transport users that a neighbour peer changed its
829 * @param peer peer this update is about (never NULL)
830 * @param address address, NULL on disconnect
833 neighbours_address_notification (void *cls,
834 const struct GNUNET_PeerIdentity *peer,
835 const struct GNUNET_HELLO_Address *address)
837 GST_clients_broadcast_address_notification (peer, address);
842 * Function called when the service shuts down. Unloads our plugins
843 * and cancels pending validations.
845 * @param cls closure, unused
846 * @param tc task context (unused)
849 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
851 GST_neighbours_stop ();
852 GST_validation_stop ();
853 GST_plugins_unload ();
855 GNUNET_ATS_scheduling_done (GST_ats);
858 GST_blacklist_stop ();
860 GST_manipulation_stop ();
862 if (NULL != GST_peerinfo)
864 GNUNET_PEERINFO_disconnect (GST_peerinfo);
867 if (NULL != GST_stats)
869 GNUNET_STATISTICS_destroy (GST_stats, GNUNET_NO);
872 if (NULL != GST_my_private_key)
874 GNUNET_free (GST_my_private_key);
875 GST_my_private_key = NULL;
882 * Initiate transport service.
885 * @param server the initialized server
886 * @param c configuration to use
889 run (void *cls, struct GNUNET_SERVER_Handle *server,
890 const struct GNUNET_CONFIGURATION_Handle *c)
893 struct GNUNET_CRYPTO_EddsaPrivateKey *pk;
894 long long unsigned int max_fd_cfg;
902 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
905 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
906 _("Transport service is lacking key configuration settings. Exiting.\n"));
907 GNUNET_SCHEDULER_shutdown ();
911 GNUNET_CONFIGURATION_get_value_time (c, "transport", "HELLO_EXPIRATION",
914 hello_expiration = GNUNET_CONSTANTS_HELLO_ADDRESS_EXPIRATION;
917 pk = GNUNET_CRYPTO_eddsa_key_create_from_file (keyfile);
918 GNUNET_free (keyfile);
919 GNUNET_assert (NULL != pk);
920 GST_my_private_key = pk;
922 GST_stats = GNUNET_STATISTICS_create ("transport", GST_cfg);
923 GST_peerinfo = GNUNET_PEERINFO_connect (GST_cfg);
924 GNUNET_CRYPTO_eddsa_key_get_public (GST_my_private_key,
925 &GST_my_identity.public_key);
926 GNUNET_assert (NULL != GST_my_private_key);
928 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
929 "My identity is `%4s'\n", GNUNET_i2s (&GST_my_identity));
931 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
933 if (NULL == GST_peerinfo)
935 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
936 _("Could not access PEERINFO service. Exiting.\n"));
937 GNUNET_SCHEDULER_shutdown ();
944 struct rlimit r_file;
945 if (0 == getrlimit (RLIMIT_NOFILE, &r_file))
947 max_fd_rlimit = r_file.rlim_cur;
948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
949 "Maximum number of open files was: %u/%u\n",
953 max_fd_rlimit = (9 * max_fd_rlimit) / 10; /* Keep 10% for rest of transport */
955 GNUNET_CONFIGURATION_get_value_number (GST_cfg, "transport", "MAX_FD", &max_fd_cfg);
957 if (max_fd_cfg > max_fd_rlimit)
960 max_fd = max_fd_rlimit;
961 if (max_fd < DEFAULT_MAX_FDS)
962 max_fd = DEFAULT_MAX_FDS;
964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
965 "Limiting number of sockets to %u: validation %u, neighbors: %u\n",
966 max_fd, (max_fd / 3) , (max_fd / 3) * 2);
968 friend_only = GNUNET_CONFIGURATION_get_value_yesno(GST_cfg, "topology","FRIENDS-ONLY");
969 if (GNUNET_SYSERR == friend_only)
970 friend_only = GNUNET_NO; /* According to topology defaults */
971 /* start subsystems */
972 GST_hello_start (friend_only, &process_hello_update, NULL);
973 GNUNET_assert (NULL != GST_hello_get());
974 GST_blacklist_start (GST_server, GST_cfg, &GST_my_identity);
976 GNUNET_ATS_scheduling_init (GST_cfg, &ats_request_address_change, NULL);
977 GST_manipulation_init (GST_cfg);
978 GST_plugins_load (&GST_manipulation_recv,
979 &plugin_env_address_change_notification,
980 &plugin_env_session_start,
981 &plugin_env_session_end,
982 &plugin_env_address_to_type,
983 &plugin_env_update_metrics);
984 GST_neighbours_start (NULL,
985 &neighbours_connect_notification,
986 &neighbours_disconnect_notification,
987 &neighbours_address_notification,
989 GST_clients_start (GST_server);
990 GST_validation_start ((max_fd / 3));
995 * The main function for the transport service.
997 * @param argc number of arguments from the command line
998 * @param argv command line arguments
999 * @return 0 ok, 1 on error
1002 main (int argc, char *const *argv)
1004 return (GNUNET_OK ==
1005 GNUNET_SERVICE_run (argc, argv, "transport",
1006 GNUNET_SERVICE_OPTION_NONE, &run, NULL)) ? 0 : 1;
1009 /* end of file gnunet-service-transport.c */