2 This file is part of GNUnet
3 (C) 2010, 2011 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
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22 * @file transport/plugin_transport_udp.c
23 * @brief Implementation of the UDP transport protocol
24 * @author Christian Grothoff
25 * @author Nathan Evans
26 * @author Matthias Wachs
29 #include "plugin_transport_udp.h"
30 #include "gnunet_hello_lib.h"
31 #include "gnunet_util_lib.h"
32 #include "gnunet_fragmentation_lib.h"
33 #include "gnunet_nat_lib.h"
34 #include "gnunet_protocols.h"
35 #include "gnunet_resolver_service.h"
36 #include "gnunet_signatures.h"
37 #include "gnunet_constants.h"
38 #include "gnunet_statistics_service.h"
39 #include "gnunet_transport_service.h"
40 #include "gnunet_transport_plugin.h"
41 #include "transport.h"
43 #define LOG(kind,...) GNUNET_log_from (kind, "transport-udp", __VA_ARGS__)
45 #define PLUGIN_NAME "udp"
48 * Number of messages we can defragment in parallel. We only really
49 * defragment 1 message at a time, but if messages get re-ordered, we
50 * may want to keep knowledge about the previous message to avoid
51 * discarding the current message in favor of a single fragment of a
52 * previous message. 3 should be good since we don't expect massive
53 * message reorderings with UDP.
55 #define UDP_MAX_MESSAGES_IN_DEFRAG 3
58 * We keep a defragmentation queue per sender address. How many
59 * sender addresses do we support at the same time? Memory consumption
60 * is roughly a factor of 32k * UDP_MAX_MESSAGES_IN_DEFRAG times this
61 * value. (So 128 corresponds to 12 MB and should suffice for
62 * connecting to roughly 128 peers via UDP).
64 #define UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG 128
67 * Closure for 'append_port'.
69 struct PrettyPrinterContext
72 * Function to call with the result.
74 GNUNET_TRANSPORT_AddressStringCallback asc;
82 * Port to add after the IP address.
103 MSG_FRAGMENTED_COMPLETE = 2,
104 MSG_UNFRAGMENTED = 3,
112 * Which peer is this session for?
114 struct GNUNET_PeerIdentity target;
116 struct UDP_FragmentationContext * frag_ctx;
119 * Address of the other peer
121 const struct sockaddr *sock_addr;
124 * Desired delay for next sending we send to other peer
126 struct GNUNET_TIME_Relative flow_delay_for_other_peer;
129 * Desired delay for next sending we received from other peer
131 struct GNUNET_TIME_Absolute flow_delay_from_other_peer;
134 * Session timeout task
136 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
139 * expected delay for ACKs
141 struct GNUNET_TIME_Relative last_expected_ack_delay;
144 * desired delay between UDP messages
146 struct GNUNET_TIME_Relative last_expected_msg_delay;
148 struct GNUNET_ATS_Information ats;
161 struct SessionCompareContext
164 const struct GNUNET_HELLO_Address *addr;
169 * Closure for 'process_inbound_tokenized_messages'
171 struct SourceInformation
176 struct GNUNET_PeerIdentity sender;
183 struct Session *session;
185 * Number of bytes in source address.
193 * Closure for 'find_receive_context'.
195 struct FindReceiveContext
198 * Where to store the result.
200 struct DefragContext *rc;
205 const struct sockaddr *addr;
207 struct Session *session;
210 * Number of bytes in 'addr'.
219 * Data structure to track defragmentation contexts based
220 * on the source of the UDP traffic.
226 * Defragmentation context.
228 struct GNUNET_DEFRAGMENT_Context *defrag;
231 * Source address this receive context is for (allocated at the
232 * end of the struct).
234 const struct sockaddr *src_addr;
237 * Reference to master plugin struct.
239 struct Plugin *plugin;
242 * Node in the defrag heap.
244 struct GNUNET_CONTAINER_HeapNode *hnode;
247 * Length of 'src_addr'
255 * Context to send fragmented messages
257 struct UDP_FragmentationContext
260 * Next in linked list
262 struct UDP_FragmentationContext * next;
265 * Previous in linked list
267 struct UDP_FragmentationContext * prev;
272 struct Plugin * plugin;
275 * Handle for GNUNET_FRAGMENT context
277 struct GNUNET_FRAGMENT_Context * frag;
280 * The session this fragmentation context belongs to
282 struct Session * session;
285 * Function to call upon completion of the transmission.
287 GNUNET_TRANSPORT_TransmitContinuation cont;
290 * Closure for 'cont'.
297 struct GNUNET_TIME_Absolute timeout;
300 * Payload size of original unfragmented message
305 * Bytes used to send all fragments on wire including UDP overhead
309 unsigned int fragments_used;
314 struct UDP_MessageWrapper
317 * Session this message belongs to
319 struct Session *session;
325 struct UDP_MessageWrapper *prev;
331 struct UDP_MessageWrapper *next;
335 * According to UDP_MessageType
340 * Message with size msg_size including UDP specific overhead
345 * Size of UDP message to send including UDP specific overhead
350 * Payload size of original message
357 struct GNUNET_TIME_Absolute timeout;
360 * Function to call upon completion of the transmission.
362 GNUNET_TRANSPORT_TransmitContinuation cont;
365 * Closure for 'cont'.
370 * Fragmentation context
371 * frag_ctx == NULL if transport <= MTU
372 * frag_ctx != NULL if transport > MTU
374 struct UDP_FragmentationContext *frag_ctx;
379 * UDP ACK Message-Packet header (after defragmentation).
381 struct UDP_ACK_Message
386 struct GNUNET_MessageHeader header;
389 * Desired delay for flow control
394 * What is the identity of the sender
396 struct GNUNET_PeerIdentity sender;
403 static uint32_t myoptions;
407 * Encapsulation of all of the state of the plugin.
409 struct Plugin * plugin;
413 * We have been notified that our readset has something to read. We don't
414 * know which socket needs to be read, so we have to check each one
415 * Then reschedule this function to be called again once more is available.
417 * @param cls the plugin handle
418 * @param tc the scheduling context (for rescheduling this function again)
421 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
425 * We have been notified that our readset has something to read. We don't
426 * know which socket needs to be read, so we have to check each one
427 * Then reschedule this function to be called again once more is available.
429 * @param cls the plugin handle
430 * @param tc the scheduling context (for rescheduling this function again)
433 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
437 * Start session timeout
440 start_session_timeout (struct Session *s);
443 * Increment session timeout due to activity
446 reschedule_session_timeout (struct Session *s);
452 stop_session_timeout (struct Session *s);
455 * (re)schedule select tasks for this plugin.
457 * @param plugin plugin to reschedule
460 schedule_select (struct Plugin *plugin)
462 struct GNUNET_TIME_Relative min_delay;
463 struct UDP_MessageWrapper *udpw;
465 if ((GNUNET_YES == plugin->enable_ipv4) && (NULL != plugin->sockv4))
467 /* Find a message ready to send:
468 * Flow delay from other peer is expired or not set (0) */
469 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
470 for (udpw = plugin->ipv4_queue_head; NULL != udpw; udpw = udpw->next)
471 min_delay = GNUNET_TIME_relative_min (min_delay,
472 GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer));
474 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
475 GNUNET_SCHEDULER_cancel(plugin->select_task);
478 * - write active set if message is ready
479 * - timeout minimum delay */
480 plugin->select_task =
481 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
482 (0 == min_delay.rel_value) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
484 (0 == min_delay.rel_value) ? plugin->ws_v4 : NULL,
485 &udp_plugin_select, plugin);
487 if ((GNUNET_YES == plugin->enable_ipv6) && (NULL != plugin->sockv6))
489 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
490 for (udpw = plugin->ipv6_queue_head; NULL != udpw; udpw = udpw->next)
491 min_delay = GNUNET_TIME_relative_min (min_delay,
492 GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer));
494 if (GNUNET_SCHEDULER_NO_TASK != plugin->select_task_v6)
495 GNUNET_SCHEDULER_cancel(plugin->select_task_v6);
496 plugin->select_task_v6 =
497 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
498 (0 == min_delay.rel_value) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
500 (0 == min_delay.rel_value) ? plugin->ws_v6 : NULL,
501 &udp_plugin_select_v6, plugin);
507 * Function called for a quick conversion of the binary address to
508 * a numeric address. Note that the caller must not free the
509 * address and that the next call to this function is allowed
510 * to override the address again.
513 * @param addr binary address
514 * @param addrlen length of the address
515 * @return string representing the same address
518 udp_address_to_string (void *cls, const void *addr, size_t addrlen)
520 static char rbuf[INET6_ADDRSTRLEN + 10];
521 char buf[INET6_ADDRSTRLEN];
525 const struct IPv4UdpAddress *t4;
526 const struct IPv6UdpAddress *t6;
532 if (addrlen == sizeof (struct IPv6UdpAddress))
536 options = ntohl (t6->options);
537 port = ntohs (t6->u6_port);
538 memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
541 else if (addrlen == sizeof (struct IPv4UdpAddress))
545 options = ntohl (t4->options);
546 port = ntohs (t4->u4_port);
547 memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
550 else if (addrlen == 0)
552 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s", TRANSPORT_SESSION_INBOUND_STRING);
560 inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
562 GNUNET_snprintf (rbuf, sizeof (rbuf), (af == AF_INET6) ? "%s.%u.[%s]:%u" : "%s.%u.%s:%u",
563 PLUGIN_NAME, options, buf, port);
569 * Function called to convert a string address to
572 * @param cls closure ('struct Plugin*')
573 * @param addr string address
574 * @param addrlen length of the address
575 * @param buf location to store the buffer
576 * @param added location to store the number of bytes in the buffer.
577 * If the function returns GNUNET_SYSERR, its contents are undefined.
578 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
581 udp_string_to_address (void *cls, const char *addr, uint16_t addrlen,
582 void **buf, size_t *added)
584 struct sockaddr_storage socket_address;
590 /* Format tcp.options.address:port */
595 if ((NULL == addr) || (addrlen == 0))
598 return GNUNET_SYSERR;
600 if ('\0' != addr[addrlen - 1])
603 return GNUNET_SYSERR;
605 if (strlen (addr) != addrlen - 1)
608 return GNUNET_SYSERR;
610 plugin = GNUNET_strdup (addr);
611 optionstr = strchr (plugin, '.');
612 if (NULL == optionstr)
615 GNUNET_free (plugin);
616 return GNUNET_SYSERR;
620 options = atol (optionstr);
621 address = strchr (optionstr, '.');
625 GNUNET_free (plugin);
626 return GNUNET_SYSERR;
632 GNUNET_STRINGS_to_address_ip (address, strlen (address),
636 GNUNET_free (plugin);
637 return GNUNET_SYSERR;
640 GNUNET_free (plugin);
642 switch (socket_address.ss_family)
646 struct IPv4UdpAddress *u4;
647 struct sockaddr_in *in4 = (struct sockaddr_in *) &socket_address;
648 u4 = GNUNET_malloc (sizeof (struct IPv4UdpAddress));
649 u4->options = htonl (options);
650 u4->ipv4_addr = in4->sin_addr.s_addr;
651 u4->u4_port = in4->sin_port;
653 *added = sizeof (struct IPv4UdpAddress);
658 struct IPv6UdpAddress *u6;
659 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &socket_address;
660 u6 = GNUNET_malloc (sizeof (struct IPv6UdpAddress));
661 u6->options = htonl (options);
662 u6->ipv6_addr = in6->sin6_addr;
663 u6->u6_port = in6->sin6_port;
665 *added = sizeof (struct IPv6UdpAddress);
670 return GNUNET_SYSERR;
676 * Append our port and forward the result.
678 * @param cls a 'struct PrettyPrinterContext'
679 * @param hostname result from DNS resolver
682 append_port (void *cls, const char *hostname)
684 struct PrettyPrinterContext *ppc = cls;
687 if (hostname == NULL)
689 ppc->asc (ppc->asc_cls, NULL);
693 if (GNUNET_YES == ppc->ipv6)
694 GNUNET_asprintf (&ret, "%s.%u.[%s]:%d", PLUGIN_NAME, ppc->options, hostname, ppc->port);
696 GNUNET_asprintf (&ret, "%s.%u.%s:%d", PLUGIN_NAME, ppc->options, hostname, ppc->port);
697 ppc->asc (ppc->asc_cls, ret);
703 * Convert the transports address to a nice, human-readable
707 * @param type name of the transport that generated the address
708 * @param addr one of the addresses of the host, NULL for the last address
709 * the specific address format depends on the transport
710 * @param addrlen length of the address
711 * @param numeric should (IP) addresses be displayed in numeric form?
712 * @param timeout after how long should we give up?
713 * @param asc function to call on each string
714 * @param asc_cls closure for asc
717 udp_plugin_address_pretty_printer (void *cls, const char *type,
718 const void *addr, size_t addrlen,
720 struct GNUNET_TIME_Relative timeout,
721 GNUNET_TRANSPORT_AddressStringCallback asc,
724 struct PrettyPrinterContext *ppc;
727 struct sockaddr_in a4;
728 struct sockaddr_in6 a6;
729 const struct IPv4UdpAddress *u4;
730 const struct IPv6UdpAddress *u6;
735 if (addrlen == sizeof (struct IPv6UdpAddress))
738 memset (&a6, 0, sizeof (a6));
739 a6.sin6_family = AF_INET6;
740 #if HAVE_SOCKADDR_IN_SIN_LEN
741 a6.sin6_len = sizeof (a6);
743 a6.sin6_port = u6->u6_port;
744 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof (struct in6_addr));
745 port = ntohs (u6->u6_port);
746 options = ntohl (u6->options);
750 else if (addrlen == sizeof (struct IPv4UdpAddress))
753 memset (&a4, 0, sizeof (a4));
754 a4.sin_family = AF_INET;
755 #if HAVE_SOCKADDR_IN_SIN_LEN
756 a4.sin_len = sizeof (a4);
758 a4.sin_port = u4->u4_port;
759 a4.sin_addr.s_addr = u4->ipv4_addr;
760 port = ntohs (u4->u4_port);
761 options = ntohl (u4->options);
765 else if (0 == addrlen)
767 asc (asc_cls, TRANSPORT_SESSION_INBOUND_STRING);
773 /* invalid address */
778 ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
780 ppc->asc_cls = asc_cls;
782 ppc->options = options;
783 if (addrlen == sizeof (struct IPv6UdpAddress))
784 ppc->ipv6 = GNUNET_YES;
786 ppc->ipv6 = GNUNET_NO;
787 GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric, timeout, &append_port, ppc);
792 call_continuation (struct UDP_MessageWrapper *udpw, int result)
796 LOG (GNUNET_ERROR_TYPE_DEBUG,
797 "Calling continuation for %u byte message to `%s' with result %s\n",
798 udpw->payload_size, GNUNET_i2s (&udpw->session->target),
799 (GNUNET_OK == result) ? "OK" : "SYSERR");
801 if (udpw->msg_size >= udpw->payload_size)
802 overhead = udpw->msg_size - udpw->payload_size;
804 overhead = udpw->msg_size;
808 switch (udpw->msg_type) {
809 case MSG_UNFRAGMENTED:
810 if (NULL != udpw->cont)
812 /* Transport continuation */
813 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
814 udpw->payload_size, udpw->msg_size);
816 GNUNET_STATISTICS_update (plugin->env->stats,
817 "# UDP, unfragmented msgs, messages, sent, success",
819 GNUNET_STATISTICS_update (plugin->env->stats,
820 "# UDP, unfragmented msgs, bytes payload, sent, success",
821 udpw->payload_size, GNUNET_NO);
822 GNUNET_STATISTICS_update (plugin->env->stats,
823 "# UDP, unfragmented msgs, bytes overhead, sent, success",
824 overhead, GNUNET_NO);
825 GNUNET_STATISTICS_update (plugin->env->stats,
826 "# UDP, total, bytes overhead, sent",
827 overhead, GNUNET_NO);
828 GNUNET_STATISTICS_update (plugin->env->stats,
829 "# UDP, total, bytes payload, sent",
830 udpw->payload_size, GNUNET_NO);
832 case MSG_FRAGMENTED_COMPLETE:
833 GNUNET_assert (NULL != udpw->frag_ctx);
834 if (udpw->frag_ctx->cont != NULL)
835 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_OK,
836 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
837 GNUNET_STATISTICS_update (plugin->env->stats,
838 "# UDP, fragmented msgs, messages, sent, success",
840 GNUNET_STATISTICS_update (plugin->env->stats,
841 "# UDP, fragmented msgs, bytes payload, sent, success",
842 udpw->payload_size, GNUNET_NO);
843 GNUNET_STATISTICS_update (plugin->env->stats,
844 "# UDP, fragmented msgs, bytes overhead, sent, success",
845 overhead, GNUNET_NO);
846 GNUNET_STATISTICS_update (plugin->env->stats,
847 "# UDP, total, bytes overhead, sent",
848 overhead, GNUNET_NO);
849 GNUNET_STATISTICS_update (plugin->env->stats,
850 "# UDP, total, bytes payload, sent",
851 udpw->payload_size, GNUNET_NO);
852 GNUNET_STATISTICS_update (plugin->env->stats,
853 "# UDP, fragmented msgs, messages, pending",
857 /* Fragmented message: enqueue next fragment */
858 if (NULL != udpw->cont)
859 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
860 udpw->payload_size, udpw->msg_size);
861 GNUNET_STATISTICS_update (plugin->env->stats,
862 "# UDP, fragmented msgs, fragments, sent, success",
864 GNUNET_STATISTICS_update (plugin->env->stats,
865 "# UDP, fragmented msgs, fragments bytes, sent, success",
866 udpw->msg_size, GNUNET_NO);
869 /* No continuation */
870 GNUNET_STATISTICS_update (plugin->env->stats,
871 "# UDP, ACK msgs, messages, sent, success",
873 GNUNET_STATISTICS_update (plugin->env->stats,
874 "# UDP, ACK msgs, bytes overhead, sent, success",
875 overhead, GNUNET_NO);
876 GNUNET_STATISTICS_update (plugin->env->stats,
877 "# UDP, total, bytes overhead, sent",
878 overhead, GNUNET_NO);
884 LOG (GNUNET_ERROR_TYPE_ERROR,
885 "ERROR: %u\n", udpw->msg_type);
891 switch (udpw->msg_type) {
892 case MSG_UNFRAGMENTED:
893 /* Unfragmented message: failed to send */
894 if (NULL != udpw->cont)
895 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
896 udpw->payload_size, overhead);
897 GNUNET_STATISTICS_update (plugin->env->stats,
898 "# UDP, unfragmented msgs, messages, sent, failure",
900 GNUNET_STATISTICS_update (plugin->env->stats,
901 "# UDP, unfragmented msgs, bytes payload, sent, failure",
902 udpw->payload_size, GNUNET_NO);
903 GNUNET_STATISTICS_update (plugin->env->stats,
904 "# UDP, unfragmented msgs, bytes overhead, sent, failure",
905 overhead, GNUNET_NO);
907 case MSG_FRAGMENTED_COMPLETE:
908 GNUNET_assert (NULL != udpw->frag_ctx);
909 if (udpw->frag_ctx->cont != NULL)
910 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_SYSERR,
911 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
912 GNUNET_STATISTICS_update (plugin->env->stats,
913 "# UDP, fragmented msgs, messages, sent, failure",
915 GNUNET_STATISTICS_update (plugin->env->stats,
916 "# UDP, fragmented msgs, bytes payload, sent, failure",
917 udpw->payload_size, GNUNET_NO);
918 GNUNET_STATISTICS_update (plugin->env->stats,
919 "# UDP, fragmented msgs, bytes payload, sent, failure",
920 overhead, GNUNET_NO);
921 GNUNET_STATISTICS_update (plugin->env->stats,
922 "# UDP, fragmented msgs, bytes payload, sent, failure",
923 overhead, GNUNET_NO);
924 GNUNET_STATISTICS_update (plugin->env->stats,
925 "# UDP, fragmented msgs, messages, pending",
929 GNUNET_assert (NULL != udpw->frag_ctx);
930 /* Fragmented message: failed to send */
931 GNUNET_STATISTICS_update (plugin->env->stats,
932 "# UDP, fragmented msgs, fragments, sent, failure",
934 GNUNET_STATISTICS_update (plugin->env->stats,
935 "# UDP, fragmented msgs, fragments bytes, sent, failure",
936 udpw->msg_size, GNUNET_NO);
939 /* ACK message: failed to send */
940 GNUNET_STATISTICS_update (plugin->env->stats,
941 "# UDP, ACK msgs, messages, sent, failure",
945 /* Beacon message: failed to send */
961 * Check if the given port is plausible (must be either our listen
962 * port or our advertised port). If it is neither, we return
965 * @param plugin global variables
966 * @param in_port port number to check
967 * @return GNUNET_OK if port is either open_port or adv_port
970 check_port (struct Plugin *plugin, uint16_t in_port)
972 if ((in_port == plugin->port) || (in_port == plugin->aport))
974 return GNUNET_SYSERR;
979 * Function that will be called to check if a binary address for this
980 * plugin is well-formed and corresponds to an address for THIS peer
981 * (as per our configuration). Naturally, if absolutely necessary,
982 * plugins can be a bit conservative in their answer, but in general
983 * plugins should make sure that the address does not redirect
984 * traffic to a 3rd party that might try to man-in-the-middle our
987 * @param cls closure, should be our handle to the Plugin
988 * @param addr pointer to the address
989 * @param addrlen length of addr
990 * @return GNUNET_OK if this is a plausible address for this peer
991 * and transport, GNUNET_SYSERR if not
995 udp_plugin_check_address (void *cls, const void *addr, size_t addrlen)
997 struct Plugin *plugin = cls;
998 struct IPv4UdpAddress *v4;
999 struct IPv6UdpAddress *v6;
1001 if ((addrlen != sizeof (struct IPv4UdpAddress)) &&
1002 (addrlen != sizeof (struct IPv6UdpAddress)))
1004 GNUNET_break_op (0);
1005 return GNUNET_SYSERR;
1007 if (addrlen == sizeof (struct IPv4UdpAddress))
1009 v4 = (struct IPv4UdpAddress *) addr;
1010 if (GNUNET_OK != check_port (plugin, ntohs (v4->u4_port)))
1011 return GNUNET_SYSERR;
1013 GNUNET_NAT_test_address (plugin->nat, &v4->ipv4_addr,
1014 sizeof (struct in_addr)))
1015 return GNUNET_SYSERR;
1019 v6 = (struct IPv6UdpAddress *) addr;
1020 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1022 GNUNET_break_op (0);
1023 return GNUNET_SYSERR;
1025 if (GNUNET_OK != check_port (plugin, ntohs (v6->u6_port)))
1026 return GNUNET_SYSERR;
1028 GNUNET_NAT_test_address (plugin->nat, &v6->ipv6_addr,
1029 sizeof (struct in6_addr)))
1030 return GNUNET_SYSERR;
1037 * Task to free resources associated with a session.
1039 * @param s session to free
1042 free_session (struct Session *s)
1044 if (NULL != s->frag_ctx)
1046 GNUNET_FRAGMENT_context_destroy(s->frag_ctx->frag, NULL, NULL);
1047 GNUNET_free (s->frag_ctx);
1055 dequeue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1057 if (plugin->bytes_in_buffer < udpw->msg_size)
1061 GNUNET_STATISTICS_update (plugin->env->stats,
1062 "# UDP, total, bytes in buffers",
1063 - (long long) udpw->msg_size, GNUNET_NO);
1064 plugin->bytes_in_buffer -= udpw->msg_size;
1066 GNUNET_STATISTICS_update (plugin->env->stats,
1067 "# UDP, total, msgs in buffers",
1069 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1070 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_queue_head,
1071 plugin->ipv4_queue_tail, udpw);
1072 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1073 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_queue_head,
1074 plugin->ipv6_queue_tail, udpw);
1078 fragmented_message_done (struct UDP_FragmentationContext *fc, int result)
1080 struct UDP_MessageWrapper *udpw;
1081 struct UDP_MessageWrapper *tmp;
1082 struct UDP_MessageWrapper dummy;
1083 struct Session *s = fc->session;
1085 LOG (GNUNET_ERROR_TYPE_DEBUG, "%p : Fragmented message removed with result %s\n", fc, (result == GNUNET_SYSERR) ? "FAIL" : "SUCCESS");
1087 /* Call continuation for fragmented message */
1088 memset (&dummy, 0, sizeof (dummy));
1089 dummy.msg_type = MSG_FRAGMENTED_COMPLETE;
1090 dummy.msg_size = s->frag_ctx->on_wire_size;
1091 dummy.payload_size = s->frag_ctx->payload_size;
1092 dummy.frag_ctx = s->frag_ctx;
1094 dummy.cont_cls = NULL;
1097 call_continuation (&dummy, result);
1099 /* Remove leftover fragments from queue */
1100 if (s->addrlen == sizeof (struct sockaddr_in6))
1102 udpw = plugin->ipv6_queue_head;
1103 while (NULL != udpw)
1106 if ((udpw->frag_ctx != NULL) && (udpw->frag_ctx == s->frag_ctx))
1108 dequeue (plugin, udpw);
1109 call_continuation (udpw, GNUNET_SYSERR);
1115 if (s->addrlen == sizeof (struct sockaddr_in))
1117 udpw = plugin->ipv4_queue_head;
1121 if ((NULL != udpw->frag_ctx) && (udpw->frag_ctx == s->frag_ctx))
1123 dequeue (plugin, udpw);
1124 call_continuation (udpw, GNUNET_SYSERR);
1131 /* Destroy fragmentation context */
1132 GNUNET_FRAGMENT_context_destroy (fc->frag,
1133 &s->last_expected_msg_delay,
1134 &s->last_expected_ack_delay);
1140 * Functions with this signature are called whenever we need
1141 * to close a session due to a disconnect or failure to
1142 * establish a connection.
1144 * @param s session to close down
1147 disconnect_session (struct Session *s)
1149 struct UDP_MessageWrapper *udpw;
1150 struct UDP_MessageWrapper *next;
1152 GNUNET_assert (GNUNET_YES != s->in_destroy);
1153 LOG (GNUNET_ERROR_TYPE_DEBUG,
1154 "Session %p to peer `%s' address ended \n",
1156 GNUNET_i2s (&s->target),
1157 GNUNET_a2s (s->sock_addr, s->addrlen));
1158 stop_session_timeout (s);
1160 if (NULL != s->frag_ctx)
1162 /* Remove fragmented message due to disconnect */
1163 fragmented_message_done (s->frag_ctx, GNUNET_SYSERR);
1166 next = plugin->ipv4_queue_head;
1167 while (NULL != (udpw = next))
1170 if (udpw->session == s)
1172 dequeue (plugin, udpw);
1173 call_continuation(udpw, GNUNET_SYSERR);
1177 next = plugin->ipv6_queue_head;
1178 while (NULL != (udpw = next))
1181 if (udpw->session == s)
1183 dequeue (plugin, udpw);
1184 call_continuation(udpw, GNUNET_SYSERR);
1189 plugin->env->session_end (plugin->env->cls, &s->target, s);
1191 if (NULL != s->frag_ctx)
1193 if (NULL != s->frag_ctx->cont)
1195 s->frag_ctx->cont (s->frag_ctx->cont_cls, &s->target, GNUNET_SYSERR,
1196 s->frag_ctx->payload_size, s->frag_ctx->on_wire_size);
1197 LOG (GNUNET_ERROR_TYPE_DEBUG,
1198 "Calling continuation for fragemented message to `%s' with result SYSERR\n",
1199 GNUNET_i2s (&s->target));
1203 GNUNET_assert (GNUNET_YES ==
1204 GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
1205 &s->target.hashPubKey,
1207 GNUNET_STATISTICS_set(plugin->env->stats,
1208 "# UDP, sessions active",
1209 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1212 s->in_destroy = GNUNET_YES;
1218 * Destroy a session, plugin is being unloaded.
1221 * @param key hash of public key of target peer
1222 * @param value a 'struct PeerSession*' to clean up
1223 * @return GNUNET_OK (continue to iterate)
1226 disconnect_and_free_it (void *cls, const struct GNUNET_HashCode * key, void *value)
1228 disconnect_session(value);
1234 * Disconnect from a remote node. Clean up session if we have one for this peer
1236 * @param cls closure for this call (should be handle to Plugin)
1237 * @param target the peeridentity of the peer to disconnect
1238 * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
1241 udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
1243 struct Plugin *plugin = cls;
1244 GNUNET_assert (plugin != NULL);
1246 GNUNET_assert (target != NULL);
1247 LOG (GNUNET_ERROR_TYPE_DEBUG,
1248 "Disconnecting from peer `%s'\n", GNUNET_i2s (target));
1249 /* Clean up sessions */
1250 GNUNET_CONTAINER_multihashmap_get_multiple (plugin->sessions, &target->hashPubKey, &disconnect_and_free_it, plugin);
1255 * Session was idle, so disconnect it
1258 session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1260 GNUNET_assert (NULL != cls);
1261 struct Session *s = cls;
1263 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1265 "Session %p was idle for %llu ms, disconnecting\n",
1266 s, (unsigned long long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
1267 /* call session destroy function */
1268 disconnect_session (s);
1273 * Start session timeout
1276 start_session_timeout (struct Session *s)
1278 GNUNET_assert (NULL != s);
1279 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s->timeout_task);
1280 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1283 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1284 "Timeout for session %p set to %llu ms\n",
1285 s, (unsigned long long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
1290 * Increment session timeout due to activity
1293 reschedule_session_timeout (struct Session *s)
1295 GNUNET_assert (NULL != s);
1296 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
1298 GNUNET_SCHEDULER_cancel (s->timeout_task);
1299 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1303 "Timeout rescheduled for session %p set to %llu ms\n",
1304 s, (unsigned long long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
1312 stop_session_timeout (struct Session *s)
1314 GNUNET_assert (NULL != s);
1316 if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
1318 GNUNET_SCHEDULER_cancel (s->timeout_task);
1319 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1320 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1321 "Timeout stopped for session %p canceled\n",
1322 s, (unsigned long long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
1327 static struct Session *
1328 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
1329 const void *addr, size_t addrlen,
1330 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1333 const struct IPv4UdpAddress *t4;
1334 const struct IPv6UdpAddress *t6;
1335 struct sockaddr_in *v4;
1336 struct sockaddr_in6 *v6;
1341 case sizeof (struct IPv4UdpAddress):
1342 if (NULL == plugin->sockv4)
1344 LOG (GNUNET_ERROR_TYPE_DEBUG,
1345 "Could not create session for peer `%s' address `%s': IPv4 is not enabled\n",
1347 udp_address_to_string(NULL, addr, addrlen));
1351 s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in));
1352 len = sizeof (struct sockaddr_in);
1353 v4 = (struct sockaddr_in *) &s[1];
1354 v4->sin_family = AF_INET;
1355 #if HAVE_SOCKADDR_IN_SIN_LEN
1356 v4->sin_len = sizeof (struct sockaddr_in);
1358 v4->sin_port = t4->u4_port;
1359 v4->sin_addr.s_addr = t4->ipv4_addr;
1360 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v4, sizeof (struct sockaddr_in));
1362 case sizeof (struct IPv6UdpAddress):
1363 if (NULL == plugin->sockv6)
1365 LOG (GNUNET_ERROR_TYPE_INFO,
1366 "Could not create session for peer `%s' address `%s': IPv6 is not enabled\n",
1368 udp_address_to_string(NULL, addr, addrlen));
1373 GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in6));
1374 len = sizeof (struct sockaddr_in6);
1375 v6 = (struct sockaddr_in6 *) &s[1];
1376 v6->sin6_family = AF_INET6;
1377 #if HAVE_SOCKADDR_IN_SIN_LEN
1378 v6->sin6_len = sizeof (struct sockaddr_in6);
1380 v6->sin6_port = t6->u6_port;
1381 v6->sin6_addr = t6->ipv6_addr;
1382 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v6, sizeof (struct sockaddr_in6));
1385 /* Must have a valid address to send to */
1386 GNUNET_break_op (0);
1390 s->target = *target;
1391 s->sock_addr = (const struct sockaddr *) &s[1];
1392 s->last_expected_ack_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 250);
1393 s->last_expected_msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
1394 s->flow_delay_from_other_peer = GNUNET_TIME_UNIT_ZERO_ABS;
1395 s->flow_delay_for_other_peer = GNUNET_TIME_UNIT_ZERO;
1396 s->inbound = GNUNET_NO;
1397 start_session_timeout (s);
1403 session_cmp_it (void *cls,
1404 const struct GNUNET_HashCode * key,
1407 struct SessionCompareContext * cctx = cls;
1408 const struct GNUNET_HELLO_Address *address = cctx->addr;
1409 struct Session *s = value;
1411 socklen_t s_addrlen = s->addrlen;
1413 LOG (GNUNET_ERROR_TYPE_DEBUG, "Comparing address %s <-> %s\n",
1414 udp_address_to_string (NULL, (void *) address->address, address->address_length),
1415 GNUNET_a2s (s->sock_addr, s->addrlen));
1416 if ((address->address_length == sizeof (struct IPv4UdpAddress)) &&
1417 (s_addrlen == sizeof (struct sockaddr_in)))
1419 struct IPv4UdpAddress * u4 = NULL;
1420 u4 = (struct IPv4UdpAddress *) address->address;
1421 const struct sockaddr_in *s4 = (const struct sockaddr_in *) s->sock_addr;
1422 if ((0 == memcmp ((const void *) &u4->ipv4_addr,(const void *) &s4->sin_addr, sizeof (struct in_addr))) &&
1423 (u4->u4_port == s4->sin_port))
1430 if ((address->address_length == sizeof (struct IPv6UdpAddress)) &&
1431 (s_addrlen == sizeof (struct sockaddr_in6)))
1433 struct IPv6UdpAddress * u6 = NULL;
1434 u6 = (struct IPv6UdpAddress *) address->address;
1435 const struct sockaddr_in6 *s6 = (const struct sockaddr_in6 *) s->sock_addr;
1436 if ((0 == memcmp (&u6->ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr))) &&
1437 (u6->u6_port == s6->sin6_port))
1448 * Function obtain the network type for a session
1450 * @param cls closure ('struct Plugin*')
1451 * @param session the session
1452 * @return the network type in HBO or GNUNET_SYSERR
1454 static enum GNUNET_ATS_Network_Type
1455 udp_get_network (void *cls,
1456 struct Session *session)
1458 return ntohl (session->ats.value);
1463 * Creates a new outbound session the transport service will use to send data to the
1466 * @param cls the plugin
1467 * @param address the address
1468 * @return the session or NULL of max connections exceeded
1470 static struct Session *
1471 udp_plugin_lookup_session (void *cls,
1472 const struct GNUNET_HELLO_Address *address)
1474 struct Plugin * plugin = cls;
1475 struct IPv6UdpAddress * udp_a6;
1476 struct IPv4UdpAddress * udp_a4;
1478 GNUNET_assert (plugin != NULL);
1479 GNUNET_assert (address != NULL);
1482 if ((address->address == NULL) ||
1483 ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1484 (address->address_length != sizeof (struct IPv6UdpAddress))))
1486 LOG (GNUNET_ERROR_TYPE_WARNING,
1487 _("Trying to create session for address of unexpected length %u (should be %u or %u)\n"),
1488 address->address_length,
1489 sizeof (struct IPv4UdpAddress),
1490 sizeof (struct IPv6UdpAddress));
1494 if (address->address_length == sizeof (struct IPv4UdpAddress))
1496 if (plugin->sockv4 == NULL)
1498 udp_a4 = (struct IPv4UdpAddress *) address->address;
1499 if (udp_a4->u4_port == 0)
1503 if (address->address_length == sizeof (struct IPv6UdpAddress))
1505 if (plugin->sockv6 == NULL)
1507 udp_a6 = (struct IPv6UdpAddress *) address->address;
1508 if (udp_a6->u6_port == 0)
1512 /* check if session already exists */
1513 struct SessionCompareContext cctx;
1514 cctx.addr = address;
1516 LOG (GNUNET_ERROR_TYPE_DEBUG,
1517 "Looking for existing session for peer `%s' `%s' \n",
1518 GNUNET_i2s (&address->peer),
1519 udp_address_to_string(NULL, address->address, address->address_length));
1520 GNUNET_CONTAINER_multihashmap_get_multiple(plugin->sessions, &address->peer.hashPubKey, session_cmp_it, &cctx);
1521 if (cctx.res != NULL)
1523 LOG (GNUNET_ERROR_TYPE_DEBUG, "Found existing session %p\n", cctx.res);
1529 static struct Session *
1530 udp_plugin_create_session (void *cls,
1531 const struct GNUNET_HELLO_Address *address)
1533 struct Session * s = NULL;
1535 /* otherwise create new */
1536 s = create_session (plugin,
1539 address->address_length,
1542 return NULL; /* protocol not supported or address invalid */
1543 LOG (GNUNET_ERROR_TYPE_DEBUG,
1544 "Creating new session %p for peer `%s' address `%s'\n",
1546 GNUNET_i2s(&address->peer),
1547 udp_address_to_string(NULL,address->address,address->address_length));
1548 GNUNET_assert (GNUNET_OK ==
1549 GNUNET_CONTAINER_multihashmap_put (plugin->sessions,
1550 &s->target.hashPubKey,
1552 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1553 GNUNET_STATISTICS_set(plugin->env->stats,
1554 "# UDP, sessions active",
1555 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1563 * Creates a new outbound session the transport service will use to send data to the
1566 * @param cls the plugin
1567 * @param address the address
1568 * @return the session or NULL of max connections exceeded
1570 static struct Session *
1571 udp_plugin_get_session (void *cls,
1572 const struct GNUNET_HELLO_Address *address)
1574 struct Session * s = NULL;
1576 if (NULL == address)
1581 if ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1582 (address->address_length != sizeof (struct IPv6UdpAddress)))
1585 /* otherwise create new */
1586 if (NULL != (s = udp_plugin_lookup_session(cls, address)))
1589 return udp_plugin_create_session (cls, address);
1594 enqueue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1596 if (plugin->bytes_in_buffer + udpw->msg_size > INT64_MAX)
1600 GNUNET_STATISTICS_update (plugin->env->stats,
1601 "# UDP, total, bytes in buffers",
1602 udpw->msg_size, GNUNET_NO);
1603 plugin->bytes_in_buffer += udpw->msg_size;
1605 GNUNET_STATISTICS_update (plugin->env->stats,
1606 "# UDP, total, msgs in buffers",
1608 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1609 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_queue_head,
1610 plugin->ipv4_queue_tail, udpw);
1611 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1612 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_queue_head,
1613 plugin->ipv6_queue_tail, udpw);
1619 * Fragment message was transmitted via UDP, let fragmentation know
1620 * to send the next fragment now.
1622 * @param cls the 'struct UDPMessageWrapper' of the fragment
1623 * @param target destination peer (ignored)
1624 * @param result GNUNET_OK on success (ignored)
1625 * @param payload bytes payload sent
1626 * @param physical bytes physical sent
1629 send_next_fragment (void *cls,
1630 const struct GNUNET_PeerIdentity *target,
1631 int result, size_t payload, size_t physical)
1633 struct UDP_MessageWrapper *udpw = cls;
1634 GNUNET_FRAGMENT_context_transmission_done (udpw->frag_ctx->frag);
1639 * Function that is called with messages created by the fragmentation
1640 * module. In the case of the 'proc' callback of the
1641 * GNUNET_FRAGMENT_context_create function, this function must
1642 * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
1644 * @param cls closure, the 'struct FragmentationContext'
1645 * @param msg the message that was created
1648 enqueue_fragment (void *cls, const struct GNUNET_MessageHeader *msg)
1650 struct UDP_FragmentationContext *frag_ctx = cls;
1651 struct Plugin *plugin = frag_ctx->plugin;
1652 struct UDP_MessageWrapper * udpw;
1653 size_t msg_len = ntohs (msg->size);
1655 LOG (GNUNET_ERROR_TYPE_DEBUG,
1656 "Enqueuing fragment with %u bytes\n", msg_len);
1657 frag_ctx->fragments_used ++;
1658 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msg_len);
1659 udpw->session = frag_ctx->session;
1660 udpw->msg_buf = (char *) &udpw[1];
1661 udpw->msg_size = msg_len;
1662 udpw->payload_size = msg_len; /*FIXME: minus fragment overhead */
1663 udpw->cont = &send_next_fragment;
1664 udpw->cont_cls = udpw;
1665 udpw->timeout = frag_ctx->timeout;
1666 udpw->frag_ctx = frag_ctx;
1667 udpw->msg_type = MSG_FRAGMENTED;
1668 memcpy (udpw->msg_buf, msg, msg_len);
1669 enqueue (plugin, udpw);
1670 schedule_select (plugin);
1675 * Function that can be used by the transport service to transmit
1676 * a message using the plugin. Note that in the case of a
1677 * peer disconnecting, the continuation MUST be called
1678 * prior to the disconnect notification itself. This function
1679 * will be called with this peer's HELLO message to initiate
1680 * a fresh connection to another peer.
1682 * @param cls closure
1683 * @param s which session must be used
1684 * @param msgbuf the message to transmit
1685 * @param msgbuf_size number of bytes in 'msgbuf'
1686 * @param priority how important is the message (most plugins will
1687 * ignore message priority and just FIFO)
1688 * @param to how long to wait at most for the transmission (does not
1689 * require plugins to discard the message after the timeout,
1690 * just advisory for the desired delay; most plugins will ignore
1692 * @param cont continuation to call once the message has
1693 * been transmitted (or if the transport is ready
1694 * for the next transmission call; or if the
1695 * peer disconnected...); can be NULL
1696 * @param cont_cls closure for cont
1697 * @return number of bytes used (on the physical network, with overheads);
1698 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1699 * and does NOT mean that the message was not transmitted (DV)
1702 udp_plugin_send (void *cls,
1704 const char *msgbuf, size_t msgbuf_size,
1705 unsigned int priority,
1706 struct GNUNET_TIME_Relative to,
1707 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1709 struct Plugin *plugin = cls;
1710 size_t udpmlen = msgbuf_size + sizeof (struct UDPMessage);
1711 struct UDP_FragmentationContext * frag_ctx;
1712 struct UDP_MessageWrapper * udpw;
1713 struct UDPMessage *udp;
1715 GNUNET_assert (plugin != NULL);
1716 GNUNET_assert (s != NULL);
1718 if ((s->addrlen == sizeof (struct sockaddr_in6)) && (plugin->sockv6 == NULL))
1719 return GNUNET_SYSERR;
1720 if ((s->addrlen == sizeof (struct sockaddr_in)) && (plugin->sockv4 == NULL))
1721 return GNUNET_SYSERR;
1722 if (udpmlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1725 return GNUNET_SYSERR;
1727 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains_value(plugin->sessions, &s->target.hashPubKey, s))
1730 return GNUNET_SYSERR;
1732 LOG (GNUNET_ERROR_TYPE_DEBUG,
1733 "UDP transmits %u-byte message to `%s' using address `%s'\n",
1735 GNUNET_i2s (&s->target),
1736 GNUNET_a2s(s->sock_addr, s->addrlen));
1740 udp = (struct UDPMessage *) mbuf;
1741 udp->header.size = htons (udpmlen);
1742 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
1743 udp->reserved = htonl (0);
1744 udp->sender = *plugin->env->my_identity;
1746 reschedule_session_timeout(s);
1747 if (udpmlen <= UDP_MTU)
1749 /* unfragmented message */
1750 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + udpmlen);
1752 udpw->msg_buf = (char *) &udpw[1];
1753 udpw->msg_size = udpmlen; /* message size with UDP overhead */
1754 udpw->payload_size = msgbuf_size; /* message size without UDP overhead */
1755 udpw->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1757 udpw->cont_cls = cont_cls;
1758 udpw->frag_ctx = NULL;
1759 udpw->msg_type = MSG_UNFRAGMENTED;
1760 memcpy (udpw->msg_buf, udp, sizeof (struct UDPMessage));
1761 memcpy (&udpw->msg_buf[sizeof (struct UDPMessage)], msgbuf, msgbuf_size);
1762 enqueue (plugin, udpw);
1764 GNUNET_STATISTICS_update (plugin->env->stats,
1765 "# UDP, unfragmented msgs, messages, attempt",
1767 GNUNET_STATISTICS_update (plugin->env->stats,
1768 "# UDP, unfragmented msgs, bytes payload, attempt",
1769 udpw->payload_size, GNUNET_NO);
1773 /* fragmented message */
1774 if (s->frag_ctx != NULL)
1775 return GNUNET_SYSERR;
1776 memcpy (&udp[1], msgbuf, msgbuf_size);
1777 frag_ctx = GNUNET_malloc (sizeof (struct UDP_FragmentationContext));
1778 frag_ctx->plugin = plugin;
1779 frag_ctx->session = s;
1780 frag_ctx->cont = cont;
1781 frag_ctx->cont_cls = cont_cls;
1782 frag_ctx->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1783 frag_ctx->payload_size = msgbuf_size; /* unfragmented message size without UDP overhead */
1784 frag_ctx->on_wire_size = 0; /* bytes with UDP and fragmentation overhead */
1785 frag_ctx->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
1788 s->last_expected_msg_delay,
1789 s->last_expected_ack_delay,
1793 s->frag_ctx = frag_ctx;
1794 GNUNET_STATISTICS_update (plugin->env->stats,
1795 "# UDP, fragmented msgs, messages, pending",
1797 GNUNET_STATISTICS_update (plugin->env->stats,
1798 "# UDP, fragmented msgs, messages, attempt",
1800 GNUNET_STATISTICS_update (plugin->env->stats,
1801 "# UDP, fragmented msgs, bytes payload, attempt",
1802 frag_ctx->payload_size, GNUNET_NO);
1804 schedule_select (plugin);
1810 * Our external IP address/port mapping has changed.
1812 * @param cls closure, the 'struct LocalAddrList'
1813 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1814 * the previous (now invalid) one
1815 * @param addr either the previous or the new public IP address
1816 * @param addrlen actual lenght of the address
1819 udp_nat_port_map_callback (void *cls, int add_remove,
1820 const struct sockaddr *addr, socklen_t addrlen)
1822 struct Plugin *plugin = cls;
1823 struct IPv4UdpAddress u4;
1824 struct IPv6UdpAddress u6;
1828 LOG (GNUNET_ERROR_TYPE_INFO,
1829 "NAT notification to %s address `%s'\n",
1830 (GNUNET_YES == add_remove) ? "add" : "remove",
1831 GNUNET_a2s (addr, addrlen));
1833 /* convert 'addr' to our internal format */
1834 switch (addr->sa_family)
1837 GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
1838 memset (&u4, 0, sizeof (u4));
1839 u4.options = htonl(myoptions);
1840 u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1841 u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
1843 args = sizeof (struct IPv4UdpAddress);
1846 GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
1847 memset (&u4, 0, sizeof (u4));
1848 u6.options = htonl(myoptions);
1849 memcpy (&u6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
1850 sizeof (struct in6_addr));
1851 u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
1853 args = sizeof (struct IPv6UdpAddress);
1859 /* modify our published address list */
1860 plugin->env->notify_address (plugin->env->cls, add_remove, arg, args, "udp");
1866 * Message tokenizer has broken up an incomming message. Pass it on
1869 * @param cls the 'struct Plugin'
1870 * @param client the 'struct SourceInformation'
1871 * @param hdr the actual message
1874 process_inbound_tokenized_messages (void *cls, void *client,
1875 const struct GNUNET_MessageHeader *hdr)
1877 struct Plugin *plugin = cls;
1878 struct SourceInformation *si = client;
1879 struct GNUNET_TIME_Relative delay;
1881 GNUNET_assert (si->session != NULL);
1882 if (GNUNET_YES == si->session->in_destroy)
1885 GNUNET_break (ntohl(si->session->ats.value) != GNUNET_ATS_NET_UNSPECIFIED);
1886 delay = plugin->env->receive (plugin->env->cls,
1890 (GNUNET_YES == si->session->inbound) ? NULL : si->arg,
1891 (GNUNET_YES == si->session->inbound) ? 0 : si->args);
1893 plugin->env->update_address_metrics (plugin->env->cls,
1895 (GNUNET_YES == si->session->inbound) ? NULL : si->arg,
1896 (GNUNET_YES == si->session->inbound) ? 0 : si->args,
1898 &si->session->ats, 1);
1900 si->session->flow_delay_for_other_peer = delay;
1901 reschedule_session_timeout(si->session);
1907 * We've received a UDP Message. Process it (pass contents to main service).
1909 * @param plugin plugin context
1910 * @param msg the message
1911 * @param sender_addr sender address
1912 * @param sender_addr_len number of bytes in sender_addr
1915 process_udp_message (struct Plugin *plugin, const struct UDPMessage *msg,
1916 const struct sockaddr *sender_addr,
1917 socklen_t sender_addr_len)
1919 struct SourceInformation si;
1921 struct IPv4UdpAddress u4;
1922 struct IPv6UdpAddress u6;
1926 if (0 != ntohl (msg->reserved))
1928 GNUNET_break_op (0);
1931 if (ntohs (msg->header.size) <
1932 sizeof (struct GNUNET_MessageHeader) + sizeof (struct UDPMessage))
1934 GNUNET_break_op (0);
1938 /* convert address */
1939 switch (sender_addr->sa_family)
1942 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in));
1943 memset (&u4, 0, sizeof (u4));
1944 u6.options = htonl (0);
1945 u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
1946 u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
1951 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in6));
1952 memset (&u6, 0, sizeof (u6));
1953 u6.options = htonl (0);
1954 u6.ipv6_addr = ((struct sockaddr_in6 *) sender_addr)->sin6_addr;
1955 u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
1963 LOG (GNUNET_ERROR_TYPE_DEBUG,
1964 "Received message with %u bytes from peer `%s' at `%s'\n",
1965 (unsigned int) ntohs (msg->header.size), GNUNET_i2s (&msg->sender),
1966 GNUNET_a2s (sender_addr, sender_addr_len));
1968 struct GNUNET_HELLO_Address * address = GNUNET_HELLO_address_allocate(&msg->sender, "udp", arg, args);
1969 if (NULL == (s = udp_plugin_lookup_session (plugin, address)))
1971 s = udp_plugin_create_session(plugin, address);
1972 s->inbound = GNUNET_YES;
1973 plugin->env->session_start (NULL, &address->peer, PLUGIN_NAME,
1974 (GNUNET_YES == s->inbound) ? NULL : address->address,
1975 (GNUNET_YES == s->inbound) ? 0 : address->address_length,
1978 GNUNET_free (address);
1980 /* iterate over all embedded messages */
1982 si.sender = msg->sender;
1986 GNUNET_SERVER_mst_receive (plugin->mst, &si, (const char *) &msg[1],
1987 ntohs (msg->header.size) -
1988 sizeof (struct UDPMessage), GNUNET_YES, GNUNET_NO);
1990 if ( (0 == s->rc) && (GNUNET_YES == s->in_destroy))
1996 * Scan the heap for a receive context with the given address.
1998 * @param cls the 'struct FindReceiveContext'
1999 * @param node internal node of the heap
2000 * @param element value stored at the node (a 'struct ReceiveContext')
2001 * @param cost cost associated with the node
2002 * @return GNUNET_YES if we should continue to iterate,
2006 find_receive_context (void *cls, struct GNUNET_CONTAINER_HeapNode *node,
2007 void *element, GNUNET_CONTAINER_HeapCostType cost)
2009 struct FindReceiveContext *frc = cls;
2010 struct DefragContext *e = element;
2012 if ((frc->addr_len == e->addr_len) &&
2013 (0 == memcmp (frc->addr, e->src_addr, frc->addr_len)))
2023 * Process a defragmented message.
2025 * @param cls the 'struct ReceiveContext'
2026 * @param msg the message
2029 fragment_msg_proc (void *cls, const struct GNUNET_MessageHeader *msg)
2031 struct DefragContext *rc = cls;
2033 if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
2038 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2043 process_udp_message (rc->plugin, (const struct UDPMessage *) msg,
2044 rc->src_addr, rc->addr_len);
2048 struct LookupContext
2050 const struct sockaddr * addr;
2052 struct Session *res;
2059 lookup_session_by_addr_it (void *cls, const struct GNUNET_HashCode * key, void *value)
2061 struct LookupContext *l_ctx = cls;
2062 struct Session * s = value;
2064 if ((s->addrlen == l_ctx->addrlen) &&
2065 (0 == memcmp (s->sock_addr, l_ctx->addr, s->addrlen)))
2075 * Transmit an acknowledgement.
2077 * @param cls the 'struct ReceiveContext'
2078 * @param id message ID (unused)
2079 * @param msg ack to transmit
2082 ack_proc (void *cls, uint32_t id, const struct GNUNET_MessageHeader *msg)
2084 struct DefragContext *rc = cls;
2085 size_t msize = sizeof (struct UDP_ACK_Message) + ntohs (msg->size);
2086 struct UDP_ACK_Message *udp_ack;
2088 struct UDP_MessageWrapper *udpw;
2090 struct LookupContext l_ctx;
2092 l_ctx.addr = rc->src_addr;
2093 l_ctx.addrlen = rc->addr_len;
2095 GNUNET_CONTAINER_multihashmap_iterate (rc->plugin->sessions,
2096 &lookup_session_by_addr_it,
2103 if (s->flow_delay_for_other_peer.rel_value <= UINT32_MAX)
2104 delay = s->flow_delay_for_other_peer.rel_value;
2106 LOG (GNUNET_ERROR_TYPE_DEBUG,
2107 "Sending ACK to `%s' including delay of %u ms\n",
2108 GNUNET_a2s (rc->src_addr,
2109 (rc->src_addr->sa_family ==
2110 AF_INET) ? sizeof (struct sockaddr_in) : sizeof (struct
2113 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msize);
2114 udpw->msg_size = msize;
2115 udpw->payload_size = 0;
2117 udpw->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
2118 udpw->msg_buf = (char *)&udpw[1];
2119 udpw->msg_type = MSG_ACK;
2120 udp_ack = (struct UDP_ACK_Message *) udpw->msg_buf;
2121 udp_ack->header.size = htons ((uint16_t) msize);
2122 udp_ack->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
2123 udp_ack->delay = htonl (delay);
2124 udp_ack->sender = *rc->plugin->env->my_identity;
2125 memcpy (&udp_ack[1], msg, ntohs (msg->size));
2126 enqueue (rc->plugin, udpw);
2131 read_process_msg (struct Plugin *plugin,
2132 const struct GNUNET_MessageHeader *msg,
2136 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2138 GNUNET_break_op (0);
2141 process_udp_message (plugin, (const struct UDPMessage *) msg,
2142 (const struct sockaddr *) addr, fromlen);
2147 read_process_ack (struct Plugin *plugin,
2148 const struct GNUNET_MessageHeader *msg,
2152 const struct GNUNET_MessageHeader *ack;
2153 const struct UDP_ACK_Message *udp_ack;
2154 struct LookupContext l_ctx;
2156 struct GNUNET_TIME_Relative flow_delay;
2158 if (ntohs (msg->size) <
2159 sizeof (struct UDP_ACK_Message) + sizeof (struct GNUNET_MessageHeader))
2161 GNUNET_break_op (0);
2164 udp_ack = (const struct UDP_ACK_Message *) msg;
2165 l_ctx.addr = (const struct sockaddr *) addr;
2166 l_ctx.addrlen = fromlen;
2168 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions,
2169 &lookup_session_by_addr_it,
2173 if ((NULL == s) || (NULL == s->frag_ctx))
2178 flow_delay.rel_value = (uint64_t) ntohl (udp_ack->delay);
2179 LOG (GNUNET_ERROR_TYPE_DEBUG,
2180 "We received a sending delay of %llu\n",
2181 flow_delay.rel_value);
2182 s->flow_delay_from_other_peer =
2183 GNUNET_TIME_relative_to_absolute (flow_delay);
2185 ack = (const struct GNUNET_MessageHeader *) &udp_ack[1];
2186 if (ntohs (ack->size) !=
2187 ntohs (msg->size) - sizeof (struct UDP_ACK_Message))
2189 GNUNET_break_op (0);
2193 if (0 != memcmp (&l_ctx.res->target, &udp_ack->sender, sizeof (struct GNUNET_PeerIdentity)))
2195 if (GNUNET_OK != GNUNET_FRAGMENT_process_ack (s->frag_ctx->frag, ack))
2197 LOG (GNUNET_ERROR_TYPE_DEBUG,
2198 "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
2199 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2200 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2201 /* Expect more ACKs to arrive */
2205 LOG (GNUNET_ERROR_TYPE_DEBUG,
2206 "Message full ACK'ed\n",
2207 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2208 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2210 /* Remove fragmented message after successful sending */
2211 fragmented_message_done (s->frag_ctx, GNUNET_OK);
2216 read_process_fragment (struct Plugin *plugin,
2217 const struct GNUNET_MessageHeader *msg,
2221 struct DefragContext *d_ctx;
2222 struct GNUNET_TIME_Absolute now;
2223 struct FindReceiveContext frc;
2226 frc.addr = (const struct sockaddr *) addr;
2227 frc.addr_len = fromlen;
2229 LOG (GNUNET_ERROR_TYPE_DEBUG, "UDP processes %u-byte fragment from `%s'\n",
2230 (unsigned int) ntohs (msg->size),
2231 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2232 /* Lookup existing receive context for this address */
2233 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
2234 &find_receive_context,
2236 now = GNUNET_TIME_absolute_get ();
2241 /* Create a new defragmentation context */
2242 d_ctx = GNUNET_malloc (sizeof (struct DefragContext) + fromlen);
2243 memcpy (&d_ctx[1], addr, fromlen);
2244 d_ctx->src_addr = (const struct sockaddr *) &d_ctx[1];
2245 d_ctx->addr_len = fromlen;
2246 d_ctx->plugin = plugin;
2248 GNUNET_DEFRAGMENT_context_create (plugin->env->stats, UDP_MTU,
2249 UDP_MAX_MESSAGES_IN_DEFRAG, d_ctx,
2250 &fragment_msg_proc, &ack_proc);
2252 GNUNET_CONTAINER_heap_insert (plugin->defrag_ctxs, d_ctx,
2253 (GNUNET_CONTAINER_HeapCostType)
2255 LOG (GNUNET_ERROR_TYPE_DEBUG,
2256 "Created new defragmentation context for %u-byte fragment from `%s'\n",
2257 (unsigned int) ntohs (msg->size),
2258 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2262 LOG (GNUNET_ERROR_TYPE_DEBUG,
2263 "Found existing defragmentation context for %u-byte fragment from `%s'\n",
2264 (unsigned int) ntohs (msg->size),
2265 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2268 if (GNUNET_OK == GNUNET_DEFRAGMENT_process_fragment (d_ctx->defrag, msg))
2270 /* keep this 'rc' from expiring */
2271 GNUNET_CONTAINER_heap_update_cost (plugin->defrag_ctxs, d_ctx->hnode,
2272 (GNUNET_CONTAINER_HeapCostType)
2275 if (GNUNET_CONTAINER_heap_get_size (plugin->defrag_ctxs) >
2276 UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
2278 /* remove 'rc' that was inactive the longest */
2279 d_ctx = GNUNET_CONTAINER_heap_remove_root (plugin->defrag_ctxs);
2280 GNUNET_assert (NULL != d_ctx);
2281 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
2282 GNUNET_free (d_ctx);
2288 * Read and process a message from the given socket.
2290 * @param plugin the overall plugin
2291 * @param rsock socket to read from
2294 udp_select_read (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *rsock)
2298 char buf[65536] GNUNET_ALIGN;
2300 const struct GNUNET_MessageHeader *msg;
2302 fromlen = sizeof (addr);
2303 memset (&addr, 0, sizeof (addr));
2304 size = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof (buf),
2305 (struct sockaddr *) &addr, &fromlen);
2307 /* On SOCK_DGRAM UDP sockets recvfrom might fail with a
2308 * WSAECONNRESET error to indicate that previous sendto() (yes, sendto!)
2309 * on this socket has failed.
2311 * WSAECONNRESET - The virtual circuit was reset by the remote side
2312 * executing a hard or abortive close. The application should close
2313 * the socket; it is no longer usable. On a UDP-datagram socket this
2314 * error indicates a previous send operation resulted in an ICMP Port
2315 * Unreachable message.
2317 if ( (-1 == size) && (ECONNRESET == errno) )
2322 LOG (GNUNET_ERROR_TYPE_DEBUG,
2323 "UDP failed to receive data: %s\n", STRERROR (errno));
2324 /* Connection failure or something. Not a protocol violation. */
2327 if (size < sizeof (struct GNUNET_MessageHeader))
2329 LOG (GNUNET_ERROR_TYPE_WARNING,
2330 "UDP got %u bytes, which is not enough for a GNUnet message header\n",
2331 (unsigned int) size);
2332 /* _MAY_ be a connection failure (got partial message) */
2333 /* But it _MAY_ also be that the other side uses non-GNUnet protocol. */
2334 GNUNET_break_op (0);
2337 msg = (const struct GNUNET_MessageHeader *) buf;
2339 LOG (GNUNET_ERROR_TYPE_DEBUG,
2340 "UDP received %u-byte message from `%s' type %i\n", (unsigned int) size,
2341 GNUNET_a2s ((const struct sockaddr *) addr, fromlen), ntohs (msg->type));
2343 if (size != ntohs (msg->size))
2345 GNUNET_break_op (0);
2349 GNUNET_STATISTICS_update (plugin->env->stats,
2350 "# UDP, total, bytes, received",
2353 switch (ntohs (msg->type))
2355 case GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON:
2356 udp_broadcast_receive (plugin, &buf, size, addr, fromlen);
2359 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
2360 read_process_msg (plugin, msg, addr, fromlen);
2363 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
2364 read_process_ack (plugin, msg, addr, fromlen);
2367 case GNUNET_MESSAGE_TYPE_FRAGMENT:
2368 read_process_fragment (plugin, msg, addr, fromlen);
2372 GNUNET_break_op (0);
2377 static struct UDP_MessageWrapper *
2378 remove_timeout_messages_and_select (struct UDP_MessageWrapper *head,
2379 struct GNUNET_NETWORK_Handle *sock)
2381 struct UDP_MessageWrapper *udpw = NULL;
2382 struct GNUNET_TIME_Relative remaining;
2385 while (udpw != NULL)
2387 /* Find messages with timeout */
2388 remaining = GNUNET_TIME_absolute_get_remaining (udpw->timeout);
2389 if (GNUNET_TIME_UNIT_ZERO.rel_value == remaining.rel_value)
2391 /* Message timed out */
2392 switch (udpw->msg_type) {
2393 case MSG_UNFRAGMENTED:
2394 GNUNET_STATISTICS_update (plugin->env->stats,
2395 "# UDP, total, bytes, sent, timeout",
2396 udpw->msg_size, GNUNET_NO);
2397 GNUNET_STATISTICS_update (plugin->env->stats,
2398 "# UDP, total, messages, sent, timeout",
2400 GNUNET_STATISTICS_update (plugin->env->stats,
2401 "# UDP, unfragmented msgs, messages, sent, timeout",
2403 GNUNET_STATISTICS_update (plugin->env->stats,
2404 "# UDP, unfragmented msgs, bytes, sent, timeout",
2405 udpw->payload_size, GNUNET_NO);
2406 /* Not fragmented message */
2407 LOG (GNUNET_ERROR_TYPE_DEBUG,
2408 "Message for peer `%s' with size %u timed out\n",
2409 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2410 call_continuation (udpw, GNUNET_SYSERR);
2411 /* Remove message */
2412 dequeue (plugin, udpw);
2415 case MSG_FRAGMENTED:
2416 /* Fragmented message */
2417 GNUNET_STATISTICS_update (plugin->env->stats,
2418 "# UDP, total, bytes, sent, timeout",
2419 udpw->frag_ctx->on_wire_size, GNUNET_NO);
2420 GNUNET_STATISTICS_update (plugin->env->stats,
2421 "# UDP, total, messages, sent, timeout",
2423 call_continuation (udpw, GNUNET_SYSERR);
2424 LOG (GNUNET_ERROR_TYPE_DEBUG,
2425 "Fragment for message for peer `%s' with size %u timed out\n",
2426 GNUNET_i2s(&udpw->session->target), udpw->frag_ctx->payload_size);
2429 GNUNET_STATISTICS_update (plugin->env->stats,
2430 "# UDP, fragmented msgs, messages, sent, timeout",
2432 GNUNET_STATISTICS_update (plugin->env->stats,
2433 "# UDP, fragmented msgs, bytes, sent, timeout",
2434 udpw->frag_ctx->payload_size, GNUNET_NO);
2435 /* Remove fragmented message due to timeout */
2436 fragmented_message_done (udpw->frag_ctx, GNUNET_SYSERR);
2439 GNUNET_STATISTICS_update (plugin->env->stats,
2440 "# UDP, total, bytes, sent, timeout",
2441 udpw->msg_size, GNUNET_NO);
2442 GNUNET_STATISTICS_update (plugin->env->stats,
2443 "# UDP, total, messages, sent, timeout",
2445 LOG (GNUNET_ERROR_TYPE_DEBUG,
2446 "ACK Message for peer `%s' with size %u timed out\n",
2447 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2448 call_continuation (udpw, GNUNET_SYSERR);
2449 dequeue (plugin, udpw);
2455 if (sock == plugin->sockv4)
2456 udpw = plugin->ipv4_queue_head;
2457 else if (sock == plugin->sockv6)
2458 udpw = plugin->ipv6_queue_head;
2461 GNUNET_break (0); /* should never happen */
2464 GNUNET_STATISTICS_update (plugin->env->stats,
2465 "# messages dismissed due to timeout",
2470 /* Message did not time out, check flow delay */
2471 remaining = GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer);
2472 if (GNUNET_TIME_UNIT_ZERO.rel_value == remaining.rel_value)
2474 /* this message is not delayed */
2475 LOG (GNUNET_ERROR_TYPE_DEBUG,
2476 "Message for peer `%s' (%u bytes) is not delayed \n",
2477 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2478 break; /* Found message to send, break */
2482 /* Message is delayed, try next */
2483 LOG (GNUNET_ERROR_TYPE_DEBUG,
2484 "Message for peer `%s' (%u bytes) is delayed for %llu \n",
2485 GNUNET_i2s(&udpw->session->target), udpw->payload_size, remaining.rel_value);
2495 analyze_send_error (struct Plugin *plugin,
2496 const struct sockaddr * sa,
2500 static int network_down_error;
2501 struct GNUNET_ATS_Information type;
2503 type = plugin->env->get_address_type (plugin->env->cls,sa, slen);
2504 if (((GNUNET_ATS_NET_LAN == ntohl(type.value)) || (GNUNET_ATS_NET_WAN == ntohl(type.value))) &&
2505 ((ENETUNREACH == errno) || (ENETDOWN == errno)))
2507 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in)))
2509 /* IPv4: "Network unreachable" or "Network down"
2511 * This indicates we do not have connectivity
2513 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2514 _("UDP could not transmit message to `%s': "
2515 "Network seems down, please check your network configuration\n"),
2516 GNUNET_a2s (sa, slen));
2518 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in6)))
2520 /* IPv6: "Network unreachable" or "Network down"
2522 * This indicates that this system is IPv6 enabled, but does not
2523 * have a valid global IPv6 address assigned or we do not have
2527 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2528 _("UDP could not transmit message to `%s': "
2529 "Please check your network configuration and disable IPv6 if your "
2530 "connection does not have a global IPv6 address\n"),
2531 GNUNET_a2s (sa, slen));
2536 LOG (GNUNET_ERROR_TYPE_WARNING,
2537 "UDP could not transmit message to `%s': `%s'\n",
2538 GNUNET_a2s (sa, slen), STRERROR (error));
2543 udp_select_send (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *sock)
2545 const struct sockaddr * sa;
2549 struct UDP_MessageWrapper *udpw = NULL;
2551 /* Find message to send */
2552 udpw = remove_timeout_messages_and_select ((sock == plugin->sockv4) ? plugin->ipv4_queue_head : plugin->ipv6_queue_head,
2555 return 0; /* No message to send */
2557 sa = udpw->session->sock_addr;
2558 slen = udpw->session->addrlen;
2560 sent = GNUNET_NETWORK_socket_sendto (sock, udpw->msg_buf, udpw->msg_size, sa, slen);
2562 if (GNUNET_SYSERR == sent)
2565 analyze_send_error (plugin, sa, slen, errno);
2566 call_continuation(udpw, GNUNET_SYSERR);
2567 GNUNET_STATISTICS_update (plugin->env->stats,
2568 "# UDP, total, bytes, sent, failure",
2570 GNUNET_STATISTICS_update (plugin->env->stats,
2571 "# UDP, total, messages, sent, failure",
2577 LOG (GNUNET_ERROR_TYPE_DEBUG,
2578 "UDP transmitted %u-byte message to `%s' `%s' (%d: %s)\n",
2579 (unsigned int) (udpw->msg_size), GNUNET_i2s(&udpw->session->target) ,GNUNET_a2s (sa, slen), (int) sent,
2580 (sent < 0) ? STRERROR (errno) : "ok");
2581 GNUNET_STATISTICS_update (plugin->env->stats,
2582 "# UDP, total, bytes, sent, success",
2584 GNUNET_STATISTICS_update (plugin->env->stats,
2585 "# UDP, total, messages, sent, success",
2587 if (NULL != udpw->frag_ctx)
2588 udpw->frag_ctx->on_wire_size += udpw->msg_size;
2589 call_continuation (udpw, GNUNET_OK);
2591 dequeue (plugin, udpw);
2600 * We have been notified that our readset has something to read. We don't
2601 * know which socket needs to be read, so we have to check each one
2602 * Then reschedule this function to be called again once more is available.
2604 * @param cls the plugin handle
2605 * @param tc the scheduling context (for rescheduling this function again)
2608 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2610 struct Plugin *plugin = cls;
2612 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
2613 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2615 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
2616 (NULL != plugin->sockv4) &&
2617 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv4)) )
2618 udp_select_read (plugin, plugin->sockv4);
2619 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2620 (NULL != plugin->sockv4) &&
2621 (NULL != plugin->ipv4_queue_head) &&
2622 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv4)) )
2623 udp_select_send (plugin, plugin->sockv4);
2624 schedule_select (plugin);
2629 * We have been notified that our readset has something to read. We don't
2630 * know which socket needs to be read, so we have to check each one
2631 * Then reschedule this function to be called again once more is available.
2633 * @param cls the plugin handle
2634 * @param tc the scheduling context (for rescheduling this function again)
2637 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2639 struct Plugin *plugin = cls;
2641 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2642 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2644 if ( ((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0) &&
2645 (NULL != plugin->sockv6) &&
2646 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv6)) )
2647 udp_select_read (plugin, plugin->sockv6);
2648 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2649 (NULL != plugin->sockv6) && (plugin->ipv6_queue_head != NULL) &&
2650 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv6)) )
2651 udp_select_send (plugin, plugin->sockv6);
2652 schedule_select (plugin);
2658 * @return number of sockets that were successfully bound
2661 setup_sockets (struct Plugin *plugin,
2662 const struct sockaddr_in6 *bind_v6,
2663 const struct sockaddr_in *bind_v4)
2666 int sockets_created = 0;
2667 struct sockaddr_in6 serverAddrv6;
2668 struct sockaddr_in serverAddrv4;
2669 struct sockaddr *serverAddr;
2670 struct sockaddr *addrs[2];
2671 socklen_t addrlens[2];
2675 /* Create IPv6 socket */
2677 if (plugin->enable_ipv6 == GNUNET_YES)
2679 plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
2680 if (NULL == plugin->sockv6)
2682 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2683 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv6 since it is not supported on this system!\n");
2684 plugin->enable_ipv6 = GNUNET_NO;
2688 memset (&serverAddrv6, '\0', sizeof (struct sockaddr_in6));
2689 #if HAVE_SOCKADDR_IN_SIN_LEN
2690 serverAddrv6.sin6_len = sizeof (struct sockaddr_in6);
2692 serverAddrv6.sin6_family = AF_INET6;
2693 if (NULL != bind_v6)
2694 serverAddrv6.sin6_addr = bind_v6->sin6_addr;
2696 serverAddrv6.sin6_addr = in6addr_any;
2698 if (0 == plugin->port) /* autodetect */
2699 serverAddrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2701 serverAddrv6.sin6_port = htons (plugin->port);
2702 addrlen = sizeof (struct sockaddr_in6);
2703 serverAddr = (struct sockaddr *) &serverAddrv6;
2708 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv6 `%s'\n",
2709 GNUNET_a2s (serverAddr, addrlen));
2711 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv6,
2712 serverAddr, addrlen, 0))
2715 if (0 != plugin->port)
2717 tries = 10; /* fail */
2718 break; /* bind failed on specific port */
2721 serverAddrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2726 GNUNET_NETWORK_socket_close (plugin->sockv6);
2727 plugin->enable_ipv6 = GNUNET_NO;
2728 plugin->sockv6 = NULL;
2731 if (plugin->sockv6 != NULL)
2733 LOG (GNUNET_ERROR_TYPE_DEBUG,
2734 "IPv6 socket created on port %s\n",
2735 GNUNET_a2s (serverAddr, addrlen));
2736 addrs[sockets_created] = (struct sockaddr *) &serverAddrv6;
2737 addrlens[sockets_created] = sizeof (struct sockaddr_in6);
2742 LOG (GNUNET_ERROR_TYPE_ERROR,
2743 "Failed to bind UDP socket to %s: %s\n",
2744 GNUNET_a2s (serverAddr, addrlen),
2750 /* Create IPv4 socket */
2752 plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
2753 if (NULL == plugin->sockv4)
2755 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2756 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv4 since it is not supported on this system!\n");
2757 plugin->enable_ipv4 = GNUNET_NO;
2761 memset (&serverAddrv4, '\0', sizeof (struct sockaddr_in));
2762 #if HAVE_SOCKADDR_IN_SIN_LEN
2763 serverAddrv4.sin_len = sizeof (struct sockaddr_in);
2765 serverAddrv4.sin_family = AF_INET;
2766 if (NULL != bind_v4)
2767 serverAddrv4.sin_addr = bind_v4->sin_addr;
2769 serverAddrv4.sin_addr.s_addr = INADDR_ANY;
2771 if (0 == plugin->port)
2773 serverAddrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2775 serverAddrv4.sin_port = htons (plugin->port);
2778 addrlen = sizeof (struct sockaddr_in);
2779 serverAddr = (struct sockaddr *) &serverAddrv4;
2784 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv4 `%s'\n",
2785 GNUNET_a2s (serverAddr, addrlen));
2788 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv4,
2789 serverAddr, addrlen, 0))
2792 if (0 != plugin->port)
2794 tries = 10; /* fail */
2795 break; /* bind failed on specific port */
2799 serverAddrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2805 GNUNET_NETWORK_socket_close (plugin->sockv4);
2806 plugin->enable_ipv4 = GNUNET_NO;
2807 plugin->sockv4 = NULL;
2810 if (plugin->sockv4 != NULL)
2812 LOG (GNUNET_ERROR_TYPE_DEBUG,
2813 "IPv4 socket created on port %s\n", GNUNET_a2s (serverAddr, addrlen));
2814 addrs[sockets_created] = (struct sockaddr *) &serverAddrv4;
2815 addrlens[sockets_created] = sizeof (struct sockaddr_in);
2820 LOG (GNUNET_ERROR_TYPE_ERROR,
2821 "Failed to bind UDP socket to %s: %s\n",
2822 GNUNET_a2s (serverAddr, addrlen), STRERROR (eno));
2826 if (0 == sockets_created)
2828 LOG (GNUNET_ERROR_TYPE_WARNING, _("Failed to open UDP sockets\n"));
2829 return 0; /* No sockets created, return */
2832 /* Create file descriptors */
2833 if (plugin->enable_ipv4 == GNUNET_YES)
2835 plugin->rs_v4 = GNUNET_NETWORK_fdset_create ();
2836 plugin->ws_v4 = GNUNET_NETWORK_fdset_create ();
2837 GNUNET_NETWORK_fdset_zero (plugin->rs_v4);
2838 GNUNET_NETWORK_fdset_zero (plugin->ws_v4);
2839 if (NULL != plugin->sockv4)
2841 GNUNET_NETWORK_fdset_set (plugin->rs_v4, plugin->sockv4);
2842 GNUNET_NETWORK_fdset_set (plugin->ws_v4, plugin->sockv4);
2846 if (plugin->enable_ipv6 == GNUNET_YES)
2848 plugin->rs_v6 = GNUNET_NETWORK_fdset_create ();
2849 plugin->ws_v6 = GNUNET_NETWORK_fdset_create ();
2850 GNUNET_NETWORK_fdset_zero (plugin->rs_v6);
2851 GNUNET_NETWORK_fdset_zero (plugin->ws_v6);
2852 if (NULL != plugin->sockv6)
2854 GNUNET_NETWORK_fdset_set (plugin->rs_v6, plugin->sockv6);
2855 GNUNET_NETWORK_fdset_set (plugin->ws_v6, plugin->sockv6);
2859 schedule_select (plugin);
2860 plugin->nat = GNUNET_NAT_register (plugin->env->cfg,
2861 GNUNET_NO, plugin->port,
2863 (const struct sockaddr **) addrs, addrlens,
2864 &udp_nat_port_map_callback, NULL, plugin);
2866 return sockets_created;
2871 * The exported method. Makes the core api available via a global and
2872 * returns the udp transport API.
2874 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
2875 * @return our 'struct GNUNET_TRANSPORT_PluginFunctions'
2878 libgnunet_plugin_transport_udp_init (void *cls)
2880 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2881 struct GNUNET_TRANSPORT_PluginFunctions *api;
2883 unsigned long long port;
2884 unsigned long long aport;
2885 unsigned long long broadcast;
2886 unsigned long long udp_max_bps;
2887 unsigned long long enable_v6;
2888 char * bind4_address;
2889 char * bind6_address;
2890 char * fancy_interval;
2891 struct GNUNET_TIME_Relative interval;
2892 struct sockaddr_in serverAddrv4;
2893 struct sockaddr_in6 serverAddrv6;
2898 if (NULL == env->receive)
2900 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
2901 initialze the plugin or the API */
2902 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
2904 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
2905 api->address_to_string = &udp_address_to_string;
2906 api->string_to_address = &udp_string_to_address;
2910 GNUNET_assert (NULL != env->stats);
2912 /* Get port number: port == 0 : autodetect a port,
2913 * > 0 : use this port,
2914 * not given : 2086 default */
2916 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp", "PORT",
2920 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
2921 "ADVERTISED_PORT", &aport))
2925 LOG (GNUNET_ERROR_TYPE_WARNING,
2926 _("Given `%s' option is out of range: %llu > %u\n"), "PORT", port,
2933 GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "nat",
2935 enable_v6 = GNUNET_NO;
2937 enable_v6 = GNUNET_YES;
2940 have_bind4 = GNUNET_NO;
2941 memset (&serverAddrv4, 0, sizeof (serverAddrv4));
2943 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
2944 "BINDTO", &bind4_address))
2946 LOG (GNUNET_ERROR_TYPE_DEBUG,
2947 "Binding udp plugin to specific address: `%s'\n",
2949 if (1 != inet_pton (AF_INET, bind4_address, &serverAddrv4.sin_addr))
2951 GNUNET_free (bind4_address);
2954 have_bind4 = GNUNET_YES;
2956 GNUNET_free_non_null (bind4_address);
2957 have_bind6 = GNUNET_NO;
2958 memset (&serverAddrv6, 0, sizeof (serverAddrv6));
2960 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
2961 "BINDTO6", &bind6_address))
2963 LOG (GNUNET_ERROR_TYPE_DEBUG,
2964 "Binding udp plugin to specific address: `%s'\n",
2967 inet_pton (AF_INET6, bind6_address, &serverAddrv6.sin6_addr))
2969 LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid IPv6 address: `%s'\n"),
2971 GNUNET_free (bind6_address);
2974 have_bind6 = GNUNET_YES;
2976 GNUNET_free_non_null (bind6_address);
2978 /* Initialize my flags */
2981 /* Enable neighbour discovery */
2982 broadcast = GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "transport-udp",
2984 if (broadcast == GNUNET_SYSERR)
2985 broadcast = GNUNET_NO;
2987 if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
2988 "BROADCAST_INTERVAL", &fancy_interval))
2990 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
2994 if (GNUNET_SYSERR == GNUNET_STRINGS_fancy_time_to_relative(fancy_interval, &interval))
2996 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30);
2998 GNUNET_free (fancy_interval);
3001 /* Maximum datarate */
3002 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3003 "MAX_BPS", &udp_max_bps))
3005 udp_max_bps = 1024 * 1024 * 50; /* 50 MB/s == infinity for practical purposes */
3008 p = GNUNET_malloc (sizeof (struct Plugin));
3011 p->broadcast_interval = interval;
3012 p->enable_ipv6 = enable_v6;
3013 p->enable_ipv4 = GNUNET_YES; /* default */
3015 p->sessions = GNUNET_CONTAINER_multihashmap_create (10, GNUNET_NO);
3016 p->defrag_ctxs = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
3017 p->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages, p);
3018 GNUNET_BANDWIDTH_tracker_init (&p->tracker,
3019 GNUNET_BANDWIDTH_value_init ((uint32_t)udp_max_bps), 30);
3022 LOG (GNUNET_ERROR_TYPE_DEBUG, "Setting up sockets\n");
3023 res = setup_sockets (p, (GNUNET_YES == have_bind6) ? &serverAddrv6 : NULL,
3024 (GNUNET_YES == have_bind4) ? &serverAddrv4 : NULL);
3025 if ((res == 0) || ((p->sockv4 == NULL) && (p->sockv6 == NULL)))
3027 LOG (GNUNET_ERROR_TYPE_ERROR,
3028 _("Failed to create network sockets, plugin failed\n"));
3029 GNUNET_CONTAINER_multihashmap_destroy (p->sessions);
3030 GNUNET_CONTAINER_heap_destroy (p->defrag_ctxs);
3031 GNUNET_SERVER_mst_destroy (p->mst);
3035 else if (broadcast == GNUNET_YES)
3037 LOG (GNUNET_ERROR_TYPE_DEBUG, "Starting broadcasting\n");
3038 setup_broadcast (p, &serverAddrv6, &serverAddrv4);
3041 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
3044 api->disconnect = &udp_disconnect;
3045 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3046 api->address_to_string = &udp_address_to_string;
3047 api->string_to_address = &udp_string_to_address;
3048 api->check_address = &udp_plugin_check_address;
3049 api->get_session = &udp_plugin_get_session;
3050 api->send = &udp_plugin_send;
3051 api->get_network = &udp_get_network;
3058 heap_cleanup_iterator (void *cls,
3059 struct GNUNET_CONTAINER_HeapNode *
3060 node, void *element,
3061 GNUNET_CONTAINER_HeapCostType
3064 struct DefragContext * d_ctx = element;
3066 GNUNET_CONTAINER_heap_remove_node (node);
3067 GNUNET_DEFRAGMENT_context_destroy(d_ctx->defrag);
3068 GNUNET_free (d_ctx);
3075 * The exported method. Makes the core api available via a global and
3076 * returns the udp transport API.
3078 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
3082 libgnunet_plugin_transport_udp_done (void *cls)
3084 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
3085 struct Plugin *plugin = api->cls;
3093 stop_broadcast (plugin);
3094 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
3096 GNUNET_SCHEDULER_cancel (plugin->select_task);
3097 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
3099 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK)
3101 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
3102 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
3105 /* Closing sockets */
3106 if (GNUNET_YES ==plugin->enable_ipv4)
3108 if (plugin->sockv4 != NULL)
3110 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
3111 plugin->sockv4 = NULL;
3113 GNUNET_NETWORK_fdset_destroy (plugin->rs_v4);
3114 GNUNET_NETWORK_fdset_destroy (plugin->ws_v4);
3116 if (GNUNET_YES ==plugin->enable_ipv6)
3118 if (plugin->sockv6 != NULL)
3120 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
3121 plugin->sockv6 = NULL;
3123 GNUNET_NETWORK_fdset_destroy (plugin->rs_v6);
3124 GNUNET_NETWORK_fdset_destroy (plugin->ws_v6);
3127 if (NULL != plugin->nat)
3128 GNUNET_NAT_unregister (plugin->nat);
3130 if (plugin->defrag_ctxs != NULL)
3132 GNUNET_CONTAINER_heap_iterate(plugin->defrag_ctxs,
3133 heap_cleanup_iterator, NULL);
3134 GNUNET_CONTAINER_heap_destroy(plugin->defrag_ctxs);
3135 plugin->defrag_ctxs = NULL;
3137 if (plugin->mst != NULL)
3139 GNUNET_SERVER_mst_destroy(plugin->mst);
3143 /* Clean up leftover messages */
3144 struct UDP_MessageWrapper * udpw;
3145 udpw = plugin->ipv4_queue_head;
3146 while (udpw != NULL)
3148 struct UDP_MessageWrapper *tmp = udpw->next;
3149 dequeue (plugin, udpw);
3150 call_continuation(udpw, GNUNET_SYSERR);
3155 udpw = plugin->ipv6_queue_head;
3156 while (udpw != NULL)
3158 struct UDP_MessageWrapper *tmp = udpw->next;
3159 dequeue (plugin, udpw);
3160 call_continuation(udpw, GNUNET_SYSERR);
3166 /* Clean up sessions */
3167 LOG (GNUNET_ERROR_TYPE_DEBUG,
3168 "Cleaning up sessions\n");
3169 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions, &disconnect_and_free_it, plugin);
3170 GNUNET_CONTAINER_multihashmap_destroy (plugin->sessions);
3173 GNUNET_free (plugin);
3176 struct Allocation *allocation;
3177 while (NULL != ahead)
3180 GNUNET_CONTAINER_DLL_remove (ahead, atail, allocation);
3181 GNUNET_free (allocation);
3183 struct Allocator *allocator;
3184 while (NULL != aehead)
3187 GNUNET_CONTAINER_DLL_remove (aehead, aetail, allocator);
3188 GNUNET_free (allocator);
3195 /* end of plugin_transport_udp.c */