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3 (C) 2010,2011 Christian Grothoff (and other contributing authors)
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21 * @file ats/ats_api_scheduling.c
22 * @brief automatic transport selection and outbound bandwidth determination
23 * @author Christian Grothoff
24 * @author Matthias Wachs
27 #include "gnunet_ats_service.h"
31 #define INTERFACE_PROCESSING_INTERVALL GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
34 * Message in linked list we should send to the ATS service. The
35 * actual binary message follows this struct.
43 struct PendingMessage *next;
48 struct PendingMessage *prev;
51 * Size of the message.
56 * Is this the 'ATS_START' message?
63 * Information we track per session.
68 * Identity of the peer (just needed for error checking).
70 struct GNUNET_PeerIdentity peer;
75 struct Session *session;
78 * Set to GNUNET_YES if the slot is used.
86 struct ATS_Network * next;
88 struct ATS_Network * prev;
90 struct sockaddr *network;
91 struct sockaddr *netmask;
98 * Handle to the ATS subsystem for bandwidth/transport scheduling information.
100 struct GNUNET_ATS_SchedulingHandle
106 const struct GNUNET_CONFIGURATION_Handle *cfg;
109 * Callback to invoke on suggestions.
111 GNUNET_ATS_AddressSuggestionCallback suggest_cb;
114 * Closure for 'suggest_cb'.
116 void *suggest_cb_cls;
119 * Connection to ATS service.
121 struct GNUNET_CLIENT_Connection *client;
124 * Head of list of messages for the ATS service.
126 struct PendingMessage *pending_head;
129 * Tail of list of messages for the ATS service
131 struct PendingMessage *pending_tail;
134 * Current request for transmission to ATS.
136 struct GNUNET_CLIENT_TransmitHandle *th;
139 * Head of network list
141 struct ATS_Network * net_head;
144 * Tail of network list
146 struct ATS_Network * net_tail;
149 * Array of session objects (we need to translate them to numbers and back
150 * for the protocol; the offset in the array is the session number on the
151 * network). Index 0 is always NULL and reserved to represent the NULL pointer.
152 * Unused entries are also NULL.
154 struct SessionRecord *session_array;
157 * Task to trigger reconnect.
159 GNUNET_SCHEDULER_TaskIdentifier task;
162 * Task retrieving interfaces from the system
164 GNUNET_SCHEDULER_TaskIdentifier interface_task;
168 * Size of the session array.
170 unsigned int session_array_size;
173 * Should we reconnect to ATS due to some serious error?
180 * Re-establish the connection to the ATS service.
182 * @param sh handle to use to re-connect.
185 reconnect (struct GNUNET_ATS_SchedulingHandle *sh);
189 * Re-establish the connection to the ATS service.
191 * @param cls handle to use to re-connect.
192 * @param tc scheduler context
195 reconnect_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
197 struct GNUNET_ATS_SchedulingHandle *sh = cls;
199 sh->task = GNUNET_SCHEDULER_NO_TASK;
205 * Disconnect from ATS and then reconnect.
207 * @param sh our handle
210 force_reconnect (struct GNUNET_ATS_SchedulingHandle *sh)
212 sh->reconnect = GNUNET_NO;
213 GNUNET_CLIENT_disconnect (sh->client);
216 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS, &reconnect_task,
222 * Transmit messages from the message queue to the service
223 * (if there are any, and if we are not already trying).
225 * @param sh handle to use
228 do_transmit (struct GNUNET_ATS_SchedulingHandle *sh);
232 * Type of a function to call when we receive a message
235 * @param cls the 'struct GNUNET_ATS_SchedulingHandle'
236 * @param msg message received, NULL on timeout or fatal error
239 process_ats_message (void *cls, const struct GNUNET_MessageHeader *msg);
243 * We can now transmit a message to ATS. Do it.
245 * @param cls the 'struct GNUNET_ATS_SchedulingHandle'
246 * @param size number of bytes we can transmit to ATS
247 * @param buf where to copy the messages
248 * @return number of bytes copied into buf
251 transmit_message_to_ats (void *cls, size_t size, void *buf)
253 struct GNUNET_ATS_SchedulingHandle *sh = cls;
254 struct PendingMessage *p;
259 if ((size == 0) || (buf == NULL))
261 force_reconnect (sh);
266 while ((NULL != (p = sh->pending_head)) && (p->size <= size))
268 memcpy (&cbuf[ret], &p[1], p->size);
271 GNUNET_CONTAINER_DLL_remove (sh->pending_head, sh->pending_tail, p);
272 if (GNUNET_YES == p->is_init)
273 GNUNET_CLIENT_receive (sh->client, &process_ats_message, sh,
274 GNUNET_TIME_UNIT_FOREVER_REL);
283 * Transmit messages from the message queue to the service
284 * (if there are any, and if we are not already trying).
286 * @param sh handle to use
289 do_transmit (struct GNUNET_ATS_SchedulingHandle *sh)
291 struct PendingMessage *p;
295 if (NULL == (p = sh->pending_head))
297 if (NULL == sh->client)
298 return; /* currently reconnecting */
300 GNUNET_CLIENT_notify_transmit_ready (sh->client, p->size,
301 GNUNET_TIME_UNIT_FOREVER_REL,
302 GNUNET_NO, &transmit_message_to_ats,
308 * Find the session object corresponding to the given session ID.
310 * @param sh our handle
311 * @param session_id current session ID
312 * @param peer peer the session belongs to
313 * @return the session object (or NULL)
315 static struct Session *
316 find_session (struct GNUNET_ATS_SchedulingHandle *sh, uint32_t session_id,
317 const struct GNUNET_PeerIdentity *peer)
320 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "ats-scheduling-api",
321 "Find session %u from peer %s in %p\n",
322 (unsigned int) session_id, GNUNET_i2s (peer), sh);
324 if (session_id >= sh->session_array_size)
331 if (sh->session_array[session_id].session == NULL)
334 memcmp (peer, &sh->session_array[session_id].peer,
335 sizeof (struct GNUNET_PeerIdentity)));
340 memcmp (peer, &sh->session_array[session_id].peer,
341 sizeof (struct GNUNET_PeerIdentity)))
344 sh->reconnect = GNUNET_YES;
347 return sh->session_array[session_id].session;
352 * Get the ID for the given session object. If we do not have an ID for
353 * the given session object, allocate one.
355 * @param sh our handle
356 * @param session session object
357 * @param peer peer the session belongs to
358 * @return the session id
361 get_session_id (struct GNUNET_ATS_SchedulingHandle *sh, struct Session *session,
362 const struct GNUNET_PeerIdentity *peer)
368 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "ats-scheduling-api",
369 "Get session ID for session %p from peer %s in %p\n", session,
370 GNUNET_i2s (peer), sh);
375 for (i = 1; i < sh->session_array_size; i++)
377 if (session == sh->session_array[i].session)
380 memcmp (peer, &sh->session_array[i].peer,
381 sizeof (struct GNUNET_PeerIdentity)));
384 if ((f == 0) && (sh->session_array[i].slot_used == GNUNET_NO))
389 f = sh->session_array_size;
390 GNUNET_array_grow (sh->session_array, sh->session_array_size,
391 sh->session_array_size * 2);
393 GNUNET_assert (f > 0);
394 sh->session_array[f].session = session;
395 sh->session_array[f].peer = *peer;
396 sh->session_array[f].slot_used = GNUNET_YES;
398 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "ats-scheduling-api",
399 "Assigning session ID %u for session %p of peer %s in %p\n", f,
400 session, GNUNET_i2s (peer), sh);
407 * Remove the session of the given session ID from the session
408 * table (it is no longer valid).
410 * @param sh our handle
411 * @param session_id identifies session that is no longer valid
412 * @param peer peer the session belongs to
415 remove_session (struct GNUNET_ATS_SchedulingHandle *sh, uint32_t session_id,
416 const struct GNUNET_PeerIdentity *peer)
418 GNUNET_assert (peer != NULL);
419 GNUNET_assert (sh != NULL);
421 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "ats-scheduling-api",
422 "Release sessionID %u from peer %s in %p\n",
423 (unsigned int) session_id, GNUNET_i2s (peer), sh);
427 GNUNET_assert (session_id < sh->session_array_size);
428 GNUNET_assert (GNUNET_YES == sh->session_array[session_id].slot_used);
430 memcmp (peer, &sh->session_array[session_id].peer,
431 sizeof (struct GNUNET_PeerIdentity)));
432 sh->session_array[session_id].session = NULL;
437 * Release the session slot from the session table (ATS service is
438 * also done using it).
440 * @param sh our handle
441 * @param session_id identifies session that is no longer valid
442 * @param peer peer the session belongs to
445 release_session (struct GNUNET_ATS_SchedulingHandle *sh, uint32_t session_id,
446 const struct GNUNET_PeerIdentity *peer)
449 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "ats-scheduling-api",
450 "Release sessionID %u from peer %s in %p\n",
451 (unsigned int) session_id, GNUNET_i2s (peer), sh);
453 if (session_id >= sh->session_array_size)
456 sh->reconnect = GNUNET_YES;
460 /* this slot should have been removed from remove_session before */
461 GNUNET_assert (sh->session_array[session_id].session == NULL);
464 memcmp (peer, &sh->session_array[session_id].peer,
465 sizeof (struct GNUNET_PeerIdentity)))
468 sh->reconnect = GNUNET_YES;
471 sh->session_array[session_id].slot_used = GNUNET_NO;
472 memset (&sh->session_array[session_id].peer, 0,
473 sizeof (struct GNUNET_PeerIdentity));
478 process_release_message (struct GNUNET_ATS_SchedulingHandle *sh,
479 const struct SessionReleaseMessage *srm)
481 release_session (sh, ntohl (srm->session_id), &srm->peer);
486 * Type of a function to call when we receive a message
489 * @param cls the 'struct GNUNET_ATS_SchedulingHandle'
490 * @param msg message received, NULL on timeout or fatal error
493 process_ats_message (void *cls, const struct GNUNET_MessageHeader *msg)
495 struct GNUNET_ATS_SchedulingHandle *sh = cls;
496 const struct AddressSuggestionMessage *m;
497 const struct GNUNET_ATS_Information *atsi;
498 const char *plugin_address;
499 const char *plugin_name;
500 uint16_t plugin_address_length;
501 uint16_t plugin_name_length;
503 struct GNUNET_HELLO_Address address;
508 force_reconnect (sh);
511 if ((ntohs (msg->type) == GNUNET_MESSAGE_TYPE_ATS_SESSION_RELEASE) &&
512 (ntohs (msg->size) == sizeof (struct SessionReleaseMessage)))
514 process_release_message (sh, (const struct SessionReleaseMessage *) msg);
515 GNUNET_CLIENT_receive (sh->client, &process_ats_message, sh,
516 GNUNET_TIME_UNIT_FOREVER_REL);
517 if (GNUNET_YES == sh->reconnect)
518 force_reconnect (sh);
521 if ((ntohs (msg->type) != GNUNET_MESSAGE_TYPE_ATS_ADDRESS_SUGGESTION) ||
522 (ntohs (msg->size) <= sizeof (struct AddressSuggestionMessage)))
525 force_reconnect (sh);
528 m = (const struct AddressSuggestionMessage *) msg;
529 ats_count = ntohl (m->ats_count);
530 plugin_address_length = ntohs (m->address_length);
531 atsi = (const struct GNUNET_ATS_Information *) &m[1];
532 plugin_address = (const char *) &atsi[ats_count];
533 plugin_name = &plugin_address[plugin_address_length];
534 plugin_name_length = ntohs (m->plugin_name_length);
535 if ((plugin_address_length + plugin_name_length +
536 ats_count * sizeof (struct GNUNET_ATS_Information) +
537 sizeof (struct AddressSuggestionMessage) != ntohs (msg->size)) ||
539 GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information))
540 || (plugin_name[plugin_name_length - 1] != '\0'))
543 force_reconnect (sh);
546 uint32_t session_id = ntohl (m->session_id);
552 s = find_session (sh, session_id, &m->peer);
556 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "ats-scheduling-api",
557 "ATS tries to use outdated session `%s'\n",
558 GNUNET_i2s (&m->peer));
559 GNUNET_CLIENT_receive (sh->client, &process_ats_message, sh,
560 GNUNET_TIME_UNIT_FOREVER_REL);
564 address.peer = m->peer;
565 address.address = plugin_address;
566 address.address_length = plugin_address_length;
567 address.transport_name = plugin_name;
569 if ((s == NULL) && (0 == address.address_length))
571 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
572 "ATS returned invalid address for peer `%s' transport `%s' address length %i, session_id %i\n",
573 GNUNET_i2s (&address.peer), address.transport_name,
574 plugin_address_length, session_id);
576 GNUNET_CLIENT_receive (sh->client, &process_ats_message, sh,
577 GNUNET_TIME_UNIT_FOREVER_REL);
581 sh->suggest_cb (sh->suggest_cb_cls, &address, s, m->bandwidth_out,
582 m->bandwidth_in, atsi, ats_count);
584 GNUNET_CLIENT_receive (sh->client, &process_ats_message, sh,
585 GNUNET_TIME_UNIT_FOREVER_REL);
586 if (GNUNET_YES == sh->reconnect)
587 force_reconnect (sh);
592 * Re-establish the connection to the ATS service.
594 * @param sh handle to use to re-connect.
597 reconnect (struct GNUNET_ATS_SchedulingHandle *sh)
599 struct PendingMessage *p;
600 struct ClientStartMessage *init;
602 GNUNET_assert (NULL == sh->client);
603 sh->client = GNUNET_CLIENT_connect ("ats", sh->cfg);
604 GNUNET_assert (NULL != sh->client);
605 if ((NULL == (p = sh->pending_head)) || (GNUNET_YES != p->is_init))
607 p = GNUNET_malloc (sizeof (struct PendingMessage) +
608 sizeof (struct ClientStartMessage));
609 p->size = sizeof (struct ClientStartMessage);
610 p->is_init = GNUNET_YES;
611 init = (struct ClientStartMessage *) &p[1];
612 init->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_START);
613 init->header.size = htons (sizeof (struct ClientStartMessage));
614 init->start_flag = htonl (START_FLAG_SCHEDULING);
615 GNUNET_CONTAINER_DLL_insert (sh->pending_head, sh->pending_tail, p);
622 * delete the current network list
625 delete_networks (struct GNUNET_ATS_SchedulingHandle *sh)
627 struct ATS_Network * cur = sh->net_head;
630 GNUNET_CONTAINER_DLL_remove(sh->net_head, sh->net_tail, cur);
638 interface_proc (void *cls, const char *name,
640 const struct sockaddr *
642 const struct sockaddr *
644 const struct sockaddr *
645 netmask, socklen_t addrlen)
647 struct GNUNET_ATS_SchedulingHandle * sh = cls;
648 /* Calculate network */
649 struct ATS_Network *net = NULL;
651 /* Skipping IPv4 loopback addresses since we have special check */
652 if (addr->sa_family == AF_INET)
654 struct sockaddr_in * a4 = (struct sockaddr_in *) addr;
656 if ((a4->sin_addr.s_addr & htonl(0xff000000)) == htonl (0x7f000000))
659 /* Skipping IPv6 loopback addresses since we have special check */
660 if (addr->sa_family == AF_INET6)
662 struct sockaddr_in6 * a6 = (struct sockaddr_in6 *) addr;
663 if (IN6_IS_ADDR_LOOPBACK (&a6->sin6_addr))
667 if (addr->sa_family == AF_INET)
669 struct sockaddr_in *addr4 = (struct sockaddr_in *) addr;
670 struct sockaddr_in *netmask4 = (struct sockaddr_in *) netmask;
671 struct sockaddr_in *tmp = NULL;
672 struct sockaddr_in network4;
674 net = GNUNET_malloc(sizeof (struct ATS_Network) + 2 * sizeof (struct sockaddr_in));
675 tmp = (struct sockaddr_in *) &net[1];
676 net->network = (struct sockaddr *) &tmp[0];
677 net->netmask = (struct sockaddr *) &tmp[1];
678 net->length = addrlen;
680 memset (&network4, 0, sizeof (network4));
681 network4.sin_family = AF_INET;
682 #if HAVE_SOCKADDR_IN_SIN_LEN
683 network4.sin_len = sizeof (network4);
685 network4.sin_addr.s_addr = (addr4->sin_addr.s_addr & netmask4->sin_addr.s_addr);
687 memcpy (net->netmask, netmask4, sizeof (struct sockaddr_in));
688 memcpy (net->network, &network4, sizeof (struct sockaddr_in));
691 if (addr->sa_family == AF_INET6)
693 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) addr;
694 struct sockaddr_in6 *netmask6 = (struct sockaddr_in6 *) netmask;
695 struct sockaddr_in6 * tmp = NULL;
696 struct sockaddr_in6 network6;
698 net = GNUNET_malloc(sizeof (struct ATS_Network) + 2 * sizeof (struct sockaddr_in6));
699 tmp = (struct sockaddr_in6 *) &net[1];
700 net->network = (struct sockaddr *) &tmp[0];
701 net->netmask = (struct sockaddr *) &tmp[1];
702 net->length = addrlen;
704 memset (&network6, 0, sizeof (network6));
705 network6.sin6_family = AF_INET6;
706 #if HAVE_SOCKADDR_IN_SIN_LEN
707 network6.sin6_len = sizeof (network6);
710 uint32_t *addr_elem = (uint32_t *) &addr6->sin6_addr;
711 uint32_t *mask_elem = (uint32_t *) &netmask6->sin6_addr;
712 uint32_t *net_elem = (uint32_t *) &network6.sin6_addr;
713 for (c = 0; c < 4; c++)
714 net_elem[c] = addr_elem[c] & mask_elem[c];
716 memcpy (net->netmask, netmask6, sizeof (struct sockaddr_in6));
717 memcpy (net->network, &network6, sizeof (struct sockaddr_in6));
724 char * netmask = GNUNET_strdup (GNUNET_a2s((struct sockaddr *) net->netmask, addrlen));
725 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding network `%s', netmask `%s'\n",
726 GNUNET_a2s((struct sockaddr *) net->network, addrlen),
728 GNUNET_free (netmask);
730 GNUNET_CONTAINER_DLL_insert(sh->net_head, sh->net_tail, net);
737 * Periodically get list of addresses
739 * @param tc Task context
742 get_addresses (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
744 struct GNUNET_ATS_SchedulingHandle * sh = cls;
745 sh->interface_task = GNUNET_SCHEDULER_NO_TASK;
746 delete_networks (sh);
747 GNUNET_OS_network_interfaces_list(interface_proc, sh);
748 sh->interface_task = GNUNET_SCHEDULER_add_delayed (INTERFACE_PROCESSING_INTERVALL,
755 * Returns where the address is located: LAN or WAN or ...
757 * @param sh the scheduling handle
758 * @param addr address
759 * @param addrlen address length
760 * @return location as GNUNET_ATS_Information
762 struct GNUNET_ATS_Information
763 GNUNET_ATS_address_get_type (struct GNUNET_ATS_SchedulingHandle * sh, const struct sockaddr * addr, socklen_t addrlen)
765 GNUNET_assert (sh != NULL);
766 struct GNUNET_ATS_Information ats;
767 struct ATS_Network * cur = sh->net_head;
768 int type = GNUNET_ATS_NET_UNSPECIFIED;
770 if (addr->sa_family == AF_UNIX)
772 type = GNUNET_ATS_NET_LOOPBACK;
775 /* IPv4 loopback check */
776 if (addr->sa_family == AF_INET)
778 struct sockaddr_in * a4 = (struct sockaddr_in *) addr;
780 if ((a4->sin_addr.s_addr & htonl(0xff000000)) == htonl (0x7f000000))
781 type = GNUNET_ATS_NET_LOOPBACK;
783 /* IPv6 loopback check */
784 if (addr->sa_family == AF_INET6)
786 struct sockaddr_in6 * a6 = (struct sockaddr_in6 *) addr;
787 if (IN6_IS_ADDR_LOOPBACK (&a6->sin6_addr))
788 type = GNUNET_ATS_NET_LOOPBACK;
791 /* Check local networks */
792 while ((cur != NULL) && (type == GNUNET_ATS_NET_UNSPECIFIED))
794 if (addrlen != cur->length)
800 if (addr->sa_family == AF_INET)
802 struct sockaddr_in * a4 = (struct sockaddr_in *) addr;
803 struct sockaddr_in * net4 = (struct sockaddr_in *) cur->network;
804 struct sockaddr_in * mask4 = (struct sockaddr_in *) cur->netmask;
806 if (((a4->sin_addr.s_addr & mask4->sin_addr.s_addr)) == net4->sin_addr.s_addr)
808 char * net = GNUNET_strdup (GNUNET_a2s ((const struct sockaddr *) net4, addrlen));
809 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "ats-scheduling-api",
810 "`%s' is in network `%s'\n",
811 GNUNET_a2s ((const struct sockaddr *)a4, addrlen),
814 type = GNUNET_ATS_NET_LAN;
817 if (addr->sa_family == AF_INET6)
819 struct sockaddr_in6 * a6 = (struct sockaddr_in6 *) addr;
820 struct sockaddr_in6 * net6 = (struct sockaddr_in6 *) cur->network;
821 struct sockaddr_in6 * mask6 = (struct sockaddr_in6 *) cur->netmask;
823 int res = GNUNET_YES;
825 uint32_t *addr_elem = (uint32_t *) &a6->sin6_addr;
826 uint32_t *mask_elem = (uint32_t *) &mask6->sin6_addr;
827 uint32_t *net_elem = (uint32_t *) &net6->sin6_addr;
828 for (c = 0; c < 4; c++)
829 if ((addr_elem[c] & mask_elem[c]) != net_elem[c])
832 if (res == GNUNET_YES)
834 char * net = GNUNET_strdup (GNUNET_a2s ((const struct sockaddr *) net6, addrlen));
835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "`%s' is in network `%s'\n",
836 GNUNET_a2s ((const struct sockaddr *) a6, addrlen),
839 type = GNUNET_ATS_NET_LAN;
845 /* no local network found for this address, default: WAN */
846 if (type == GNUNET_ATS_NET_UNSPECIFIED)
847 type = GNUNET_ATS_NET_WAN;
848 ats.type = htonl (GNUNET_ATS_NETWORK_TYPE);
849 ats.value = htonl (type);
850 return (const struct GNUNET_ATS_Information) ats;
855 * Initialize the ATS subsystem.
857 * @param cfg configuration to use
858 * @param suggest_cb notification to call whenever the suggestation changed
859 * @param suggest_cb_cls closure for 'suggest_cb'
860 * @return ats context
862 struct GNUNET_ATS_SchedulingHandle *
863 GNUNET_ATS_scheduling_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
864 GNUNET_ATS_AddressSuggestionCallback suggest_cb,
865 void *suggest_cb_cls)
867 struct GNUNET_ATS_SchedulingHandle *sh;
869 sh = GNUNET_malloc (sizeof (struct GNUNET_ATS_SchedulingHandle));
871 sh->suggest_cb = suggest_cb;
872 sh->suggest_cb_cls = suggest_cb_cls;
873 GNUNET_array_grow (sh->session_array, sh->session_array_size, 4);
874 GNUNET_OS_network_interfaces_list(interface_proc, sh);
875 sh->interface_task = GNUNET_SCHEDULER_add_delayed (INTERFACE_PROCESSING_INTERVALL,
884 * Client is done with ATS scheduling, release resources.
886 * @param sh handle to release
889 GNUNET_ATS_scheduling_done (struct GNUNET_ATS_SchedulingHandle *sh)
891 struct PendingMessage *p;
893 while (NULL != (p = sh->pending_head))
895 GNUNET_CONTAINER_DLL_remove (sh->pending_head, sh->pending_tail, p);
898 if (NULL != sh->client)
900 GNUNET_CLIENT_disconnect (sh->client);
903 if (GNUNET_SCHEDULER_NO_TASK != sh->task)
905 GNUNET_SCHEDULER_cancel (sh->task);
906 sh->task = GNUNET_SCHEDULER_NO_TASK;
909 delete_networks (sh);
910 if (sh->interface_task != GNUNET_SCHEDULER_NO_TASK)
912 GNUNET_SCHEDULER_cancel(sh->interface_task);
913 sh->interface_task = GNUNET_SCHEDULER_NO_TASK;
915 GNUNET_array_grow (sh->session_array, sh->session_array_size, 0);
921 * We would like to reset the address suggestion block time for this
925 * @param peer identity of the peer we want to reset
928 GNUNET_ATS_reset_backoff (struct GNUNET_ATS_SchedulingHandle *sh,
929 const struct GNUNET_PeerIdentity *peer)
931 struct PendingMessage *p;
932 struct ResetBackoffMessage *m;
934 p = GNUNET_malloc (sizeof (struct PendingMessage) +
935 sizeof (struct ResetBackoffMessage));
936 p->size = sizeof (struct ResetBackoffMessage);
937 p->is_init = GNUNET_NO;
938 m = (struct ResetBackoffMessage *) &p[1];
939 m->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_RESET_BACKOFF);
940 m->header.size = htons (sizeof (struct ResetBackoffMessage));
941 m->reserved = htonl (0);
943 GNUNET_CONTAINER_DLL_insert_tail (sh->pending_head, sh->pending_tail, p);
948 * We would like to establish a new connection with a peer. ATS
949 * should suggest a good address to begin with.
952 * @param peer identity of the peer we need an address for
955 GNUNET_ATS_suggest_address (struct GNUNET_ATS_SchedulingHandle *sh,
956 const struct GNUNET_PeerIdentity *peer)
958 struct PendingMessage *p;
959 struct RequestAddressMessage *m;
961 // FIXME: ATS needs to remember this in case of
963 p = GNUNET_malloc (sizeof (struct PendingMessage) +
964 sizeof (struct RequestAddressMessage));
965 p->size = sizeof (struct RequestAddressMessage);
966 p->is_init = GNUNET_NO;
967 m = (struct RequestAddressMessage *) &p[1];
968 m->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS);
969 m->header.size = htons (sizeof (struct RequestAddressMessage));
970 m->reserved = htonl (0);
972 GNUNET_CONTAINER_DLL_insert_tail (sh->pending_head, sh->pending_tail, p);
978 * We would like to stop receiving address updates for this peer
981 * @param peer identity of the peer
984 GNUNET_ATS_suggest_address_cancel (struct GNUNET_ATS_SchedulingHandle *sh,
985 const struct GNUNET_PeerIdentity *peer)
987 struct PendingMessage *p;
988 struct RequestAddressMessage *m;
990 p = GNUNET_malloc (sizeof (struct PendingMessage) +
991 sizeof (struct RequestAddressMessage));
992 p->size = sizeof (struct RequestAddressMessage);
993 p->is_init = GNUNET_NO;
994 m = (struct RequestAddressMessage *) &p[1];
995 m->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS_CANCEL);
996 m->header.size = htons (sizeof (struct RequestAddressMessage));
997 m->reserved = htonl (0);
999 GNUNET_CONTAINER_DLL_insert_tail (sh->pending_head, sh->pending_tail, p);
1005 * We have updated performance statistics for a given address. Note
1006 * that this function can be called for addresses that are currently
1007 * in use as well as addresses that are valid but not actively in use.
1008 * Furthermore, the peer may not even be connected to us right now (in
1009 * which case the call may be ignored or the information may be stored
1010 * for later use). Update bandwidth assignments.
1013 * @param address the address
1014 * @param session session handle (if available)
1015 * @param ats performance data for the address
1016 * @param ats_count number of performance records in 'ats'
1019 GNUNET_ATS_address_update (struct GNUNET_ATS_SchedulingHandle *sh,
1020 const struct GNUNET_HELLO_Address *address,
1021 struct Session *session,
1022 const struct GNUNET_ATS_Information *ats,
1025 struct PendingMessage *p;
1026 struct AddressUpdateMessage *m;
1027 struct GNUNET_ATS_Information *am;
1032 if (address == NULL)
1037 if ((address == NULL) && (session == NULL))
1044 (address->transport_name ==
1045 NULL) ? 0 : strlen (address->transport_name) + 1;
1047 sizeof (struct AddressUpdateMessage) + address->address_length +
1048 ats_count * sizeof (struct GNUNET_ATS_Information) + namelen;
1049 if ((msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
1050 (address->address_length >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
1051 (namelen >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
1053 GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information)))
1059 p = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
1061 p->is_init = GNUNET_NO;
1062 m = (struct AddressUpdateMessage *) &p[1];
1063 m->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESS_UPDATE);
1064 m->header.size = htons (msize);
1065 m->ats_count = htonl (ats_count);
1066 m->peer = address->peer;
1067 m->address_length = htons (address->address_length);
1068 m->plugin_name_length = htons (namelen);
1069 m->session_id = htonl (get_session_id (sh, session, &address->peer));
1070 am = (struct GNUNET_ATS_Information *) &m[1];
1071 memcpy (am, ats, ats_count * sizeof (struct GNUNET_ATS_Information));
1072 pm = (char *) &am[ats_count];
1073 memcpy (pm, address->address, address->address_length);
1074 memcpy (&pm[address->address_length], address->transport_name, namelen);
1075 GNUNET_CONTAINER_DLL_insert_tail (sh->pending_head, sh->pending_tail, p);
1081 * An address is now in use or not used any more.
1084 * @param address the address
1085 * @param session session handle
1086 * @param in_use GNUNET_YES if this address is now used, GNUNET_NO
1087 * if address is not used any more
1090 GNUNET_ATS_address_in_use (struct GNUNET_ATS_SchedulingHandle *sh,
1091 const struct GNUNET_HELLO_Address *address,
1092 struct Session *session, int in_use)
1094 struct PendingMessage *p;
1095 struct AddressUseMessage *m;
1100 GNUNET_assert (NULL != address);
1102 (address->transport_name ==
1103 NULL) ? 0 : strlen (address->transport_name) + 1;
1104 msize = sizeof (struct AddressUseMessage) + address->address_length + namelen;
1105 if ((msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
1106 (address->address_length >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
1107 (namelen >= GNUNET_SERVER_MAX_MESSAGE_SIZE))
1113 p = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
1115 p->is_init = GNUNET_NO;
1116 m = (struct AddressUseMessage *) &p[1];
1117 m->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESS_IN_USE);
1118 m->header.size = htons (msize);
1119 m->peer = address->peer;
1120 m->in_use = htons (in_use);
1121 m->address_length = htons (address->address_length);
1122 m->plugin_name_length = htons (namelen);
1123 m->session_id = htonl (get_session_id (sh, session, &address->peer));
1124 pm = (char *) &m[1];
1125 memcpy (pm, address->address, address->address_length);
1126 memcpy (&pm[address->address_length], address->transport_name, namelen);
1127 GNUNET_CONTAINER_DLL_insert_tail (sh->pending_head, sh->pending_tail, p);
1133 * A session got destroyed, stop including it as a valid address.
1136 * @param address the address
1137 * @param session session handle that is no longer valid
1140 GNUNET_ATS_address_destroyed (struct GNUNET_ATS_SchedulingHandle *sh,
1141 const struct GNUNET_HELLO_Address *address,
1142 struct Session *session)
1144 struct PendingMessage *p;
1145 struct AddressDestroyedMessage *m;
1149 uint32_t session_id;
1151 GNUNET_assert (address->transport_name != NULL);
1152 namelen = strlen (address->transport_name) + 1;
1153 GNUNET_assert (namelen > 1);
1155 sizeof (struct AddressDestroyedMessage) + address->address_length +
1157 if ((msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
1158 (address->address_length >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
1159 (namelen >= GNUNET_SERVER_MAX_MESSAGE_SIZE))
1165 p = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
1167 p->is_init = GNUNET_NO;
1168 m = (struct AddressDestroyedMessage *) &p[1];
1169 m->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESS_DESTROYED);
1170 m->header.size = htons (msize);
1171 m->reserved = htonl (0);
1172 m->peer = address->peer;
1173 m->address_length = htons (address->address_length);
1174 m->plugin_name_length = htons (namelen);
1175 session_id = get_session_id (sh, session, &address->peer);
1176 m->session_id = htonl (session_id);
1177 pm = (char *) &m[1];
1178 memcpy (pm, address->address, address->address_length);
1179 memcpy (&pm[address->address_length], address->transport_name, namelen);
1180 GNUNET_CONTAINER_DLL_insert_tail (sh->pending_head, sh->pending_tail, p);
1182 remove_session (sh, session_id, &address->peer);
1185 /* end of ats_api_scheduling.c */