2 This file is part of GNUnet
3 (C) 2010-2013 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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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 * Running pretty printers: head
69 static struct PrettyPrinterContext *ppc_dll_head;
72 * Running pretty printers: tail
74 static struct PrettyPrinterContext *ppc_dll_tail;
77 * Closure for 'append_port'.
79 struct PrettyPrinterContext
84 struct PrettyPrinterContext *next;
89 struct PrettyPrinterContext *prev;
94 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
99 struct GNUNET_RESOLVER_RequestHandle *resolver_handle;
102 * Function to call with the result.
104 GNUNET_TRANSPORT_AddressStringCallback asc;
112 * Port to add after the IP address.
133 MSG_FRAGMENTED_COMPLETE = 2,
134 MSG_UNFRAGMENTED = 3,
142 * Which peer is this session for?
144 struct GNUNET_PeerIdentity target;
146 struct UDP_FragmentationContext * frag_ctx;
149 * Address of the other peer
151 const struct sockaddr *sock_addr;
154 * Desired delay for next sending we send to other peer
156 struct GNUNET_TIME_Relative flow_delay_for_other_peer;
159 * Desired delay for next sending we received from other peer
161 struct GNUNET_TIME_Absolute flow_delay_from_other_peer;
164 * Session timeout task
166 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
169 * expected delay for ACKs
171 struct GNUNET_TIME_Relative last_expected_ack_delay;
174 * desired delay between UDP messages
176 struct GNUNET_TIME_Relative last_expected_msg_delay;
178 struct GNUNET_ATS_Information ats;
191 struct SessionCompareContext
194 const struct GNUNET_HELLO_Address *addr;
199 * Closure for 'process_inbound_tokenized_messages'
201 struct SourceInformation
206 struct GNUNET_PeerIdentity sender;
213 struct Session *session;
215 * Number of bytes in source address.
223 * Closure for 'find_receive_context'.
225 struct FindReceiveContext
228 * Where to store the result.
230 struct DefragContext *rc;
235 const struct sockaddr *addr;
237 struct Session *session;
240 * Number of bytes in 'addr'.
249 * Data structure to track defragmentation contexts based
250 * on the source of the UDP traffic.
256 * Defragmentation context.
258 struct GNUNET_DEFRAGMENT_Context *defrag;
261 * Source address this receive context is for (allocated at the
262 * end of the struct).
264 const struct sockaddr *src_addr;
267 * Reference to master plugin struct.
269 struct Plugin *plugin;
272 * Node in the defrag heap.
274 struct GNUNET_CONTAINER_HeapNode *hnode;
277 * Length of 'src_addr'
285 * Context to send fragmented messages
287 struct UDP_FragmentationContext
290 * Next in linked list
292 struct UDP_FragmentationContext * next;
295 * Previous in linked list
297 struct UDP_FragmentationContext * prev;
302 struct Plugin * plugin;
305 * Handle for GNUNET_FRAGMENT context
307 struct GNUNET_FRAGMENT_Context * frag;
310 * The session this fragmentation context belongs to
312 struct Session * session;
315 * Function to call upon completion of the transmission.
317 GNUNET_TRANSPORT_TransmitContinuation cont;
320 * Closure for 'cont'.
327 struct GNUNET_TIME_Absolute timeout;
330 * Payload size of original unfragmented message
335 * Bytes used to send all fragments on wire including UDP overhead
339 unsigned int fragments_used;
344 struct UDP_MessageWrapper
347 * Session this message belongs to
349 struct Session *session;
355 struct UDP_MessageWrapper *prev;
361 struct UDP_MessageWrapper *next;
365 * According to UDP_MessageType
370 * Message with size msg_size including UDP specific overhead
375 * Size of UDP message to send including UDP specific overhead
380 * Payload size of original message
387 struct GNUNET_TIME_Absolute timeout;
390 * Function to call upon completion of the transmission.
392 GNUNET_TRANSPORT_TransmitContinuation cont;
395 * Closure for 'cont'.
400 * Fragmentation context
401 * frag_ctx == NULL if transport <= MTU
402 * frag_ctx != NULL if transport > MTU
404 struct UDP_FragmentationContext *frag_ctx;
409 * UDP ACK Message-Packet header (after defragmentation).
411 struct UDP_ACK_Message
416 struct GNUNET_MessageHeader header;
419 * Desired delay for flow control
424 * What is the identity of the sender
426 struct GNUNET_PeerIdentity sender;
433 static uint32_t myoptions;
437 * Encapsulation of all of the state of the plugin.
439 struct Plugin * plugin;
443 * We have been notified that our readset has something to read. We don't
444 * know which socket needs to be read, so we have to check each one
445 * Then reschedule this function to be called again once more is available.
447 * @param cls the plugin handle
448 * @param tc the scheduling context (for rescheduling this function again)
451 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
455 * We have been notified that our readset has something to read. We don't
456 * know which socket needs to be read, so we have to check each one
457 * Then reschedule this function to be called again once more is available.
459 * @param cls the plugin handle
460 * @param tc the scheduling context (for rescheduling this function again)
463 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
470 stop_session_timeout (struct Session *s)
472 GNUNET_assert (NULL != s);
474 if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
476 GNUNET_SCHEDULER_cancel (s->timeout_task);
477 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
478 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
479 "Timeout stopped for session %p canceled\n",
486 * (re)schedule select tasks for this plugin.
488 * @param plugin plugin to reschedule
491 schedule_select (struct Plugin *plugin)
493 struct GNUNET_TIME_Relative min_delay;
494 struct UDP_MessageWrapper *udpw;
496 if ((GNUNET_YES == plugin->enable_ipv4) && (NULL != plugin->sockv4))
498 /* Find a message ready to send:
499 * Flow delay from other peer is expired or not set (0) */
500 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
501 for (udpw = plugin->ipv4_queue_head; NULL != udpw; udpw = udpw->next)
502 min_delay = GNUNET_TIME_relative_min (min_delay,
503 GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer));
505 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
506 GNUNET_SCHEDULER_cancel(plugin->select_task);
509 * - write active set if message is ready
510 * - timeout minimum delay */
511 plugin->select_task =
512 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
513 (0 == min_delay.rel_value_us) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
515 (0 == min_delay.rel_value_us) ? plugin->ws_v4 : NULL,
516 &udp_plugin_select, plugin);
518 if ((GNUNET_YES == plugin->enable_ipv6) && (NULL != plugin->sockv6))
520 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
521 for (udpw = plugin->ipv6_queue_head; NULL != udpw; udpw = udpw->next)
522 min_delay = GNUNET_TIME_relative_min (min_delay,
523 GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer));
525 if (GNUNET_SCHEDULER_NO_TASK != plugin->select_task_v6)
526 GNUNET_SCHEDULER_cancel(plugin->select_task_v6);
527 plugin->select_task_v6 =
528 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
529 (0 == min_delay.rel_value_us) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
531 (0 == min_delay.rel_value_us) ? plugin->ws_v6 : NULL,
532 &udp_plugin_select_v6, plugin);
538 * Function called for a quick conversion of the binary address to
539 * a numeric address. Note that the caller must not free the
540 * address and that the next call to this function is allowed
541 * to override the address again.
544 * @param addr binary address
545 * @param addrlen length of the address
546 * @return string representing the same address
549 udp_address_to_string (void *cls, const void *addr, size_t addrlen)
551 static char rbuf[INET6_ADDRSTRLEN + 10];
552 char buf[INET6_ADDRSTRLEN];
556 const struct IPv4UdpAddress *t4;
557 const struct IPv6UdpAddress *t6;
563 if (addrlen == sizeof (struct IPv6UdpAddress))
567 options = ntohl (t6->options);
568 port = ntohs (t6->u6_port);
569 memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
572 else if (addrlen == sizeof (struct IPv4UdpAddress))
576 options = ntohl (t4->options);
577 port = ntohs (t4->u4_port);
578 memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
581 else if (addrlen == 0)
583 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s", TRANSPORT_SESSION_INBOUND_STRING);
590 inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
592 GNUNET_snprintf (rbuf, sizeof (rbuf),
593 (af == AF_INET6) ? "%s.%u.[%s]:%u" : "%s.%u.%s:%u",
594 PLUGIN_NAME, options, buf, port);
600 * Function called to convert a string address to
603 * @param cls closure ('struct Plugin*')
604 * @param addr string address
605 * @param addrlen length of the address
606 * @param buf location to store the buffer
607 * @param added location to store the number of bytes in the buffer.
608 * If the function returns GNUNET_SYSERR, its contents are undefined.
609 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
612 udp_string_to_address (void *cls, const char *addr, uint16_t addrlen,
613 void **buf, size_t *added)
615 struct sockaddr_storage socket_address;
621 /* Format tcp.options.address:port */
626 if ((NULL == addr) || (addrlen == 0))
629 return GNUNET_SYSERR;
631 if ('\0' != addr[addrlen - 1])
634 return GNUNET_SYSERR;
636 if (strlen (addr) != addrlen - 1)
639 return GNUNET_SYSERR;
641 plugin = GNUNET_strdup (addr);
642 optionstr = strchr (plugin, '.');
643 if (NULL == optionstr)
646 GNUNET_free (plugin);
647 return GNUNET_SYSERR;
651 options = atol (optionstr);
652 address = strchr (optionstr, '.');
656 GNUNET_free (plugin);
657 return GNUNET_SYSERR;
663 GNUNET_STRINGS_to_address_ip (address, strlen (address),
667 GNUNET_free (plugin);
668 return GNUNET_SYSERR;
671 GNUNET_free (plugin);
673 switch (socket_address.ss_family)
677 struct IPv4UdpAddress *u4;
678 struct sockaddr_in *in4 = (struct sockaddr_in *) &socket_address;
679 u4 = GNUNET_malloc (sizeof (struct IPv4UdpAddress));
680 u4->options = htonl (options);
681 u4->ipv4_addr = in4->sin_addr.s_addr;
682 u4->u4_port = in4->sin_port;
684 *added = sizeof (struct IPv4UdpAddress);
689 struct IPv6UdpAddress *u6;
690 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &socket_address;
691 u6 = GNUNET_malloc (sizeof (struct IPv6UdpAddress));
692 u6->options = htonl (options);
693 u6->ipv6_addr = in6->sin6_addr;
694 u6->u6_port = in6->sin6_port;
696 *added = sizeof (struct IPv6UdpAddress);
701 return GNUNET_SYSERR;
707 ppc_cancel_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
709 struct PrettyPrinterContext *ppc = cls;
710 /* GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PPC %p was not removed!\n", ppc); */
711 ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
712 if (NULL != ppc->resolver_handle)
714 GNUNET_RESOLVER_request_cancel (ppc->resolver_handle);
715 ppc->resolver_handle = NULL;
718 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, ppc);
724 * Append our port and forward the result.
726 * @param cls a 'struct PrettyPrinterContext'
727 * @param hostname result from DNS resolver
730 append_port (void *cls, const char *hostname)
732 struct PrettyPrinterContext *ppc = cls;
733 struct PrettyPrinterContext *cur;
735 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "PPC callback: %p `%s'\n",ppc, hostname); */
736 if (hostname == NULL)
738 ppc->asc (ppc->asc_cls, NULL);
739 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, ppc);
740 GNUNET_SCHEDULER_cancel (ppc->timeout_task);
741 ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
742 ppc->resolver_handle = NULL;
743 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "PPC %p was removed!\n", ppc); */
747 for (cur = ppc_dll_head; (NULL != cur); cur = cur->next)
754 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid callback for PPC %p \n", ppc);
758 if (GNUNET_YES == ppc->ipv6)
759 GNUNET_asprintf (&ret, "%s.%u.[%s]:%d", PLUGIN_NAME, ppc->options, hostname, ppc->port);
761 GNUNET_asprintf (&ret, "%s.%u.%s:%d", PLUGIN_NAME, ppc->options, hostname, ppc->port);
762 ppc->asc (ppc->asc_cls, ret);
767 * Convert the transports address to a nice, human-readable
771 * @param type name of the transport that generated the address
772 * @param addr one of the addresses of the host, NULL for the last address
773 * the specific address format depends on the transport
774 * @param addrlen length of the address
775 * @param numeric should (IP) addresses be displayed in numeric form?
776 * @param timeout after how long should we give up?
777 * @param asc function to call on each string
778 * @param asc_cls closure for asc
781 udp_plugin_address_pretty_printer (void *cls, const char *type,
782 const void *addr, size_t addrlen,
784 struct GNUNET_TIME_Relative timeout,
785 GNUNET_TRANSPORT_AddressStringCallback asc,
788 struct PrettyPrinterContext *ppc;
791 struct sockaddr_in a4;
792 struct sockaddr_in6 a6;
793 const struct IPv4UdpAddress *u4;
794 const struct IPv6UdpAddress *u6;
799 if (addrlen == sizeof (struct IPv6UdpAddress))
802 memset (&a6, 0, sizeof (a6));
803 a6.sin6_family = AF_INET6;
804 #if HAVE_SOCKADDR_IN_SIN_LEN
805 a6.sin6_len = sizeof (a6);
807 a6.sin6_port = u6->u6_port;
808 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof (struct in6_addr));
809 port = ntohs (u6->u6_port);
810 options = ntohl (u6->options);
814 else if (addrlen == sizeof (struct IPv4UdpAddress))
817 memset (&a4, 0, sizeof (a4));
818 a4.sin_family = AF_INET;
819 #if HAVE_SOCKADDR_IN_SIN_LEN
820 a4.sin_len = sizeof (a4);
822 a4.sin_port = u4->u4_port;
823 a4.sin_addr.s_addr = u4->ipv4_addr;
824 port = ntohs (u4->u4_port);
825 options = ntohl (u4->options);
829 else if (0 == addrlen)
831 asc (asc_cls, TRANSPORT_SESSION_INBOUND_STRING);
837 /* invalid address */
842 ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
844 ppc->asc_cls = asc_cls;
846 ppc->options = options;
847 if (addrlen == sizeof (struct IPv6UdpAddress))
848 ppc->ipv6 = GNUNET_YES;
850 ppc->ipv6 = GNUNET_NO;
851 ppc->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply(timeout, 2),
852 &ppc_cancel_task, ppc);
853 GNUNET_CONTAINER_DLL_insert (ppc_dll_head, ppc_dll_tail, ppc);
854 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "PPC %p was created!\n", ppc); */
855 ppc->resolver_handle = GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric, timeout, &append_port, ppc);
861 call_continuation (struct UDP_MessageWrapper *udpw, int result)
865 LOG (GNUNET_ERROR_TYPE_DEBUG,
866 "Calling continuation for %u byte message to `%s' with result %s\n",
867 udpw->payload_size, GNUNET_i2s (&udpw->session->target),
868 (GNUNET_OK == result) ? "OK" : "SYSERR");
870 if (udpw->msg_size >= udpw->payload_size)
871 overhead = udpw->msg_size - udpw->payload_size;
873 overhead = udpw->msg_size;
877 switch (udpw->msg_type) {
878 case MSG_UNFRAGMENTED:
879 if (NULL != udpw->cont)
881 /* Transport continuation */
882 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
883 udpw->payload_size, udpw->msg_size);
885 GNUNET_STATISTICS_update (plugin->env->stats,
886 "# UDP, unfragmented msgs, messages, sent, success",
888 GNUNET_STATISTICS_update (plugin->env->stats,
889 "# UDP, unfragmented msgs, bytes payload, sent, success",
890 udpw->payload_size, GNUNET_NO);
891 GNUNET_STATISTICS_update (plugin->env->stats,
892 "# UDP, unfragmented msgs, bytes overhead, sent, success",
893 overhead, GNUNET_NO);
894 GNUNET_STATISTICS_update (plugin->env->stats,
895 "# UDP, total, bytes overhead, sent",
896 overhead, GNUNET_NO);
897 GNUNET_STATISTICS_update (plugin->env->stats,
898 "# UDP, total, bytes payload, sent",
899 udpw->payload_size, GNUNET_NO);
901 case MSG_FRAGMENTED_COMPLETE:
902 GNUNET_assert (NULL != udpw->frag_ctx);
903 if (udpw->frag_ctx->cont != NULL)
904 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_OK,
905 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
906 GNUNET_STATISTICS_update (plugin->env->stats,
907 "# UDP, fragmented msgs, messages, sent, success",
909 GNUNET_STATISTICS_update (plugin->env->stats,
910 "# UDP, fragmented msgs, bytes payload, sent, success",
911 udpw->payload_size, GNUNET_NO);
912 GNUNET_STATISTICS_update (plugin->env->stats,
913 "# UDP, fragmented msgs, bytes overhead, sent, success",
914 overhead, GNUNET_NO);
915 GNUNET_STATISTICS_update (plugin->env->stats,
916 "# UDP, total, bytes overhead, sent",
917 overhead, GNUNET_NO);
918 GNUNET_STATISTICS_update (plugin->env->stats,
919 "# UDP, total, bytes payload, sent",
920 udpw->payload_size, GNUNET_NO);
921 GNUNET_STATISTICS_update (plugin->env->stats,
922 "# UDP, fragmented msgs, messages, pending",
926 /* Fragmented message: enqueue next fragment */
927 if (NULL != udpw->cont)
928 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
929 udpw->payload_size, udpw->msg_size);
930 GNUNET_STATISTICS_update (plugin->env->stats,
931 "# UDP, fragmented msgs, fragments, sent, success",
933 GNUNET_STATISTICS_update (plugin->env->stats,
934 "# UDP, fragmented msgs, fragments bytes, sent, success",
935 udpw->msg_size, GNUNET_NO);
938 /* No continuation */
939 GNUNET_STATISTICS_update (plugin->env->stats,
940 "# UDP, ACK msgs, messages, sent, success",
942 GNUNET_STATISTICS_update (plugin->env->stats,
943 "# UDP, ACK msgs, bytes overhead, sent, success",
944 overhead, GNUNET_NO);
945 GNUNET_STATISTICS_update (plugin->env->stats,
946 "# UDP, total, bytes overhead, sent",
947 overhead, GNUNET_NO);
953 LOG (GNUNET_ERROR_TYPE_ERROR,
954 "ERROR: %u\n", udpw->msg_type);
960 switch (udpw->msg_type) {
961 case MSG_UNFRAGMENTED:
962 /* Unfragmented message: failed to send */
963 if (NULL != udpw->cont)
964 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
965 udpw->payload_size, overhead);
966 GNUNET_STATISTICS_update (plugin->env->stats,
967 "# UDP, unfragmented msgs, messages, sent, failure",
969 GNUNET_STATISTICS_update (plugin->env->stats,
970 "# UDP, unfragmented msgs, bytes payload, sent, failure",
971 udpw->payload_size, GNUNET_NO);
972 GNUNET_STATISTICS_update (plugin->env->stats,
973 "# UDP, unfragmented msgs, bytes overhead, sent, failure",
974 overhead, GNUNET_NO);
976 case MSG_FRAGMENTED_COMPLETE:
977 GNUNET_assert (NULL != udpw->frag_ctx);
978 if (udpw->frag_ctx->cont != NULL)
979 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_SYSERR,
980 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
981 GNUNET_STATISTICS_update (plugin->env->stats,
982 "# UDP, fragmented msgs, messages, sent, failure",
984 GNUNET_STATISTICS_update (plugin->env->stats,
985 "# UDP, fragmented msgs, bytes payload, sent, failure",
986 udpw->payload_size, GNUNET_NO);
987 GNUNET_STATISTICS_update (plugin->env->stats,
988 "# UDP, fragmented msgs, bytes payload, sent, failure",
989 overhead, GNUNET_NO);
990 GNUNET_STATISTICS_update (plugin->env->stats,
991 "# UDP, fragmented msgs, bytes payload, sent, failure",
992 overhead, GNUNET_NO);
993 GNUNET_STATISTICS_update (plugin->env->stats,
994 "# UDP, fragmented msgs, messages, pending",
998 GNUNET_assert (NULL != udpw->frag_ctx);
999 /* Fragmented message: failed to send */
1000 GNUNET_STATISTICS_update (plugin->env->stats,
1001 "# UDP, fragmented msgs, fragments, sent, failure",
1003 GNUNET_STATISTICS_update (plugin->env->stats,
1004 "# UDP, fragmented msgs, fragments bytes, sent, failure",
1005 udpw->msg_size, GNUNET_NO);
1008 /* ACK message: failed to send */
1009 GNUNET_STATISTICS_update (plugin->env->stats,
1010 "# UDP, ACK msgs, messages, sent, failure",
1014 /* Beacon message: failed to send */
1030 * Check if the given port is plausible (must be either our listen
1031 * port or our advertised port). If it is neither, we return
1034 * @param plugin global variables
1035 * @param in_port port number to check
1036 * @return GNUNET_OK if port is either open_port or adv_port
1039 check_port (struct Plugin *plugin, uint16_t in_port)
1041 if ((in_port == plugin->port) || (in_port == plugin->aport))
1043 return GNUNET_SYSERR;
1048 * Function that will be called to check if a binary address for this
1049 * plugin is well-formed and corresponds to an address for THIS peer
1050 * (as per our configuration). Naturally, if absolutely necessary,
1051 * plugins can be a bit conservative in their answer, but in general
1052 * plugins should make sure that the address does not redirect
1053 * traffic to a 3rd party that might try to man-in-the-middle our
1056 * @param cls closure, should be our handle to the Plugin
1057 * @param addr pointer to the address
1058 * @param addrlen length of addr
1059 * @return GNUNET_OK if this is a plausible address for this peer
1060 * and transport, GNUNET_SYSERR if not
1064 udp_plugin_check_address (void *cls, const void *addr, size_t addrlen)
1066 struct Plugin *plugin = cls;
1067 struct IPv4UdpAddress *v4;
1068 struct IPv6UdpAddress *v6;
1070 if ((addrlen != sizeof (struct IPv4UdpAddress)) &&
1071 (addrlen != sizeof (struct IPv6UdpAddress)))
1073 return GNUNET_SYSERR;
1075 if (addrlen == sizeof (struct IPv4UdpAddress))
1077 v4 = (struct IPv4UdpAddress *) addr;
1078 if (GNUNET_OK != check_port (plugin, ntohs (v4->u4_port)))
1079 return GNUNET_SYSERR;
1081 GNUNET_NAT_test_address (plugin->nat, &v4->ipv4_addr,
1082 sizeof (struct in_addr)))
1083 return GNUNET_SYSERR;
1087 v6 = (struct IPv6UdpAddress *) addr;
1088 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1090 GNUNET_break_op (0);
1091 return GNUNET_SYSERR;
1093 if (GNUNET_OK != check_port (plugin, ntohs (v6->u6_port)))
1094 return GNUNET_SYSERR;
1096 GNUNET_NAT_test_address (plugin->nat, &v6->ipv6_addr,
1097 sizeof (struct in6_addr)))
1098 return GNUNET_SYSERR;
1105 * Task to free resources associated with a session.
1107 * @param s session to free
1110 free_session (struct Session *s)
1112 if (NULL != s->frag_ctx)
1114 GNUNET_FRAGMENT_context_destroy(s->frag_ctx->frag, NULL, NULL);
1115 GNUNET_free (s->frag_ctx);
1123 dequeue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1125 if (plugin->bytes_in_buffer < udpw->msg_size)
1129 GNUNET_STATISTICS_update (plugin->env->stats,
1130 "# UDP, total, bytes in buffers",
1131 - (long long) udpw->msg_size, GNUNET_NO);
1132 plugin->bytes_in_buffer -= udpw->msg_size;
1134 GNUNET_STATISTICS_update (plugin->env->stats,
1135 "# UDP, total, msgs in buffers",
1137 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1138 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_queue_head,
1139 plugin->ipv4_queue_tail, udpw);
1140 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1141 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_queue_head,
1142 plugin->ipv6_queue_tail, udpw);
1147 fragmented_message_done (struct UDP_FragmentationContext *fc, int result)
1149 struct UDP_MessageWrapper *udpw;
1150 struct UDP_MessageWrapper *tmp;
1151 struct UDP_MessageWrapper dummy;
1152 struct Session *s = fc->session;
1154 LOG (GNUNET_ERROR_TYPE_DEBUG,
1155 "%p : Fragmented message removed with result %s\n",
1157 (result == GNUNET_SYSERR) ? "FAIL" : "SUCCESS");
1159 /* Call continuation for fragmented message */
1160 memset (&dummy, 0, sizeof (dummy));
1161 dummy.msg_type = MSG_FRAGMENTED_COMPLETE;
1162 dummy.msg_size = s->frag_ctx->on_wire_size;
1163 dummy.payload_size = s->frag_ctx->payload_size;
1164 dummy.frag_ctx = s->frag_ctx;
1166 dummy.cont_cls = NULL;
1169 call_continuation (&dummy, result);
1171 /* Remove leftover fragments from queue */
1172 if (s->addrlen == sizeof (struct sockaddr_in6))
1174 udpw = plugin->ipv6_queue_head;
1175 while (NULL != udpw)
1178 if ((udpw->frag_ctx != NULL) && (udpw->frag_ctx == s->frag_ctx))
1180 dequeue (plugin, udpw);
1181 call_continuation (udpw, GNUNET_SYSERR);
1187 if (s->addrlen == sizeof (struct sockaddr_in))
1189 udpw = plugin->ipv4_queue_head;
1193 if ((NULL != udpw->frag_ctx) && (udpw->frag_ctx == s->frag_ctx))
1195 dequeue (plugin, udpw);
1196 call_continuation (udpw, GNUNET_SYSERR);
1203 /* Destroy fragmentation context */
1204 GNUNET_FRAGMENT_context_destroy (fc->frag,
1205 &s->last_expected_msg_delay,
1206 &s->last_expected_ack_delay);
1212 * Functions with this signature are called whenever we need
1213 * to close a session due to a disconnect or failure to
1214 * establish a connection.
1216 * @param s session to close down
1219 disconnect_session (struct Session *s)
1221 struct UDP_MessageWrapper *udpw;
1222 struct UDP_MessageWrapper *next;
1224 GNUNET_assert (GNUNET_YES != s->in_destroy);
1225 LOG (GNUNET_ERROR_TYPE_DEBUG,
1226 "Session %p to peer `%s' address ended \n",
1228 GNUNET_i2s (&s->target),
1229 GNUNET_a2s (s->sock_addr, s->addrlen));
1230 stop_session_timeout (s);
1232 if (NULL != s->frag_ctx)
1234 /* Remove fragmented message due to disconnect */
1235 fragmented_message_done (s->frag_ctx, GNUNET_SYSERR);
1238 next = plugin->ipv4_queue_head;
1239 while (NULL != (udpw = next))
1242 if (udpw->session == s)
1244 dequeue (plugin, udpw);
1245 call_continuation(udpw, GNUNET_SYSERR);
1249 next = plugin->ipv6_queue_head;
1250 while (NULL != (udpw = next))
1253 if (udpw->session == s)
1255 dequeue (plugin, udpw);
1256 call_continuation(udpw, GNUNET_SYSERR);
1261 plugin->env->session_end (plugin->env->cls, &s->target, s);
1263 if (NULL != s->frag_ctx)
1265 if (NULL != s->frag_ctx->cont)
1267 s->frag_ctx->cont (s->frag_ctx->cont_cls, &s->target, GNUNET_SYSERR,
1268 s->frag_ctx->payload_size, s->frag_ctx->on_wire_size);
1269 LOG (GNUNET_ERROR_TYPE_DEBUG,
1270 "Calling continuation for fragemented message to `%s' with result SYSERR\n",
1271 GNUNET_i2s (&s->target));
1275 GNUNET_assert (GNUNET_YES ==
1276 GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
1277 &s->target.hashPubKey,
1279 GNUNET_STATISTICS_set(plugin->env->stats,
1280 "# UDP, sessions active",
1281 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1284 s->in_destroy = GNUNET_YES;
1290 * Destroy a session, plugin is being unloaded.
1293 * @param key hash of public key of target peer
1294 * @param value a 'struct PeerSession*' to clean up
1295 * @return GNUNET_OK (continue to iterate)
1298 disconnect_and_free_it (void *cls, const struct GNUNET_HashCode * key, void *value)
1300 disconnect_session(value);
1306 * Disconnect from a remote node. Clean up session if we have one for this peer
1308 * @param cls closure for this call (should be handle to Plugin)
1309 * @param target the peeridentity of the peer to disconnect
1310 * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
1313 udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
1315 struct Plugin *plugin = cls;
1316 GNUNET_assert (plugin != NULL);
1318 GNUNET_assert (target != NULL);
1319 LOG (GNUNET_ERROR_TYPE_DEBUG,
1320 "Disconnecting from peer `%s'\n", GNUNET_i2s (target));
1321 /* Clean up sessions */
1322 GNUNET_CONTAINER_multihashmap_get_multiple (plugin->sessions, &target->hashPubKey, &disconnect_and_free_it, plugin);
1327 * Session was idle, so disconnect it
1330 session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1332 GNUNET_assert (NULL != cls);
1333 struct Session *s = cls;
1335 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1336 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1337 "Session %p was idle for %s, disconnecting\n",
1339 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1341 /* call session destroy function */
1342 disconnect_session (s);
1347 * Start session timeout
1350 start_session_timeout (struct Session *s)
1352 GNUNET_assert (NULL != s);
1353 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s->timeout_task);
1354 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1357 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1358 "Timeout for session %p set to %s\n",
1360 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1366 * Increment session timeout due to activity
1369 reschedule_session_timeout (struct Session *s)
1371 GNUNET_assert (NULL != s);
1372 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
1374 GNUNET_SCHEDULER_cancel (s->timeout_task);
1375 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1379 "Timeout rescheduled for session %p set to %s\n",
1381 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1386 static struct Session *
1387 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
1388 const void *addr, size_t addrlen,
1389 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1392 const struct IPv4UdpAddress *t4;
1393 const struct IPv6UdpAddress *t6;
1394 struct sockaddr_in *v4;
1395 struct sockaddr_in6 *v6;
1400 case sizeof (struct IPv4UdpAddress):
1401 if (NULL == plugin->sockv4)
1403 LOG (GNUNET_ERROR_TYPE_DEBUG,
1404 "Could not create session for peer `%s' address `%s': IPv4 is not enabled\n",
1406 udp_address_to_string(NULL, addr, addrlen));
1410 s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in));
1411 len = sizeof (struct sockaddr_in);
1412 v4 = (struct sockaddr_in *) &s[1];
1413 v4->sin_family = AF_INET;
1414 #if HAVE_SOCKADDR_IN_SIN_LEN
1415 v4->sin_len = sizeof (struct sockaddr_in);
1417 v4->sin_port = t4->u4_port;
1418 v4->sin_addr.s_addr = t4->ipv4_addr;
1419 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v4, sizeof (struct sockaddr_in));
1421 case sizeof (struct IPv6UdpAddress):
1422 if (NULL == plugin->sockv6)
1424 LOG (GNUNET_ERROR_TYPE_INFO,
1425 "Could not create session for peer `%s' address `%s': IPv6 is not enabled\n",
1427 udp_address_to_string(NULL, addr, addrlen));
1431 s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in6));
1432 len = sizeof (struct sockaddr_in6);
1433 v6 = (struct sockaddr_in6 *) &s[1];
1434 v6->sin6_family = AF_INET6;
1435 #if HAVE_SOCKADDR_IN_SIN_LEN
1436 v6->sin6_len = sizeof (struct sockaddr_in6);
1438 v6->sin6_port = t6->u6_port;
1439 v6->sin6_addr = t6->ipv6_addr;
1440 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v6, sizeof (struct sockaddr_in6));
1443 /* Must have a valid address to send to */
1444 GNUNET_STATISTICS_update (plugin->env->stats,
1446 ("# requests to create session with invalid address"),
1451 s->target = *target;
1452 s->sock_addr = (const struct sockaddr *) &s[1];
1453 s->last_expected_ack_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 250);
1454 s->last_expected_msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
1455 s->flow_delay_from_other_peer = GNUNET_TIME_UNIT_ZERO_ABS;
1456 s->flow_delay_for_other_peer = GNUNET_TIME_UNIT_ZERO;
1457 s->inbound = GNUNET_NO;
1458 start_session_timeout (s);
1464 session_cmp_it (void *cls,
1465 const struct GNUNET_HashCode * key,
1468 struct SessionCompareContext * cctx = cls;
1469 const struct GNUNET_HELLO_Address *address = cctx->addr;
1470 struct Session *s = value;
1472 socklen_t s_addrlen = s->addrlen;
1474 LOG (GNUNET_ERROR_TYPE_DEBUG,
1475 "Comparing address %s <-> %s\n",
1476 udp_address_to_string (NULL, (void *) address->address,
1477 address->address_length),
1478 GNUNET_a2s (s->sock_addr, s->addrlen));
1479 if ((address->address_length == sizeof (struct IPv4UdpAddress)) &&
1480 (s_addrlen == sizeof (struct sockaddr_in)))
1482 struct IPv4UdpAddress * u4 = NULL;
1483 u4 = (struct IPv4UdpAddress *) address->address;
1484 const struct sockaddr_in *s4 = (const struct sockaddr_in *) s->sock_addr;
1485 if ((0 == memcmp ((const void *) &u4->ipv4_addr,(const void *) &s4->sin_addr, sizeof (struct in_addr))) &&
1486 (u4->u4_port == s4->sin_port))
1493 if ((address->address_length == sizeof (struct IPv6UdpAddress)) &&
1494 (s_addrlen == sizeof (struct sockaddr_in6)))
1496 struct IPv6UdpAddress * u6 = NULL;
1497 u6 = (struct IPv6UdpAddress *) address->address;
1498 const struct sockaddr_in6 *s6 = (const struct sockaddr_in6 *) s->sock_addr;
1499 if ((0 == memcmp (&u6->ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr))) &&
1500 (u6->u6_port == s6->sin6_port))
1511 * Function obtain the network type for a session
1513 * @param cls closure ('struct Plugin*')
1514 * @param session the session
1515 * @return the network type in HBO or GNUNET_SYSERR
1517 static enum GNUNET_ATS_Network_Type
1518 udp_get_network (void *cls,
1519 struct Session *session)
1521 return ntohl (session->ats.value);
1526 * Creates a new outbound session the transport service will use to send data to the
1529 * @param cls the plugin
1530 * @param address the address
1531 * @return the session or NULL of max connections exceeded
1533 static struct Session *
1534 udp_plugin_lookup_session (void *cls,
1535 const struct GNUNET_HELLO_Address *address)
1537 struct Plugin * plugin = cls;
1538 struct IPv6UdpAddress * udp_a6;
1539 struct IPv4UdpAddress * udp_a4;
1541 GNUNET_assert (plugin != NULL);
1542 GNUNET_assert (address != NULL);
1545 if ((address->address == NULL) ||
1546 ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1547 (address->address_length != sizeof (struct IPv6UdpAddress))))
1549 LOG (GNUNET_ERROR_TYPE_WARNING,
1550 _("Trying to create session for address of unexpected length %u (should be %u or %u)\n"),
1551 address->address_length,
1552 sizeof (struct IPv4UdpAddress),
1553 sizeof (struct IPv6UdpAddress));
1557 if (address->address_length == sizeof (struct IPv4UdpAddress))
1559 if (plugin->sockv4 == NULL)
1561 udp_a4 = (struct IPv4UdpAddress *) address->address;
1562 if (udp_a4->u4_port == 0)
1566 if (address->address_length == sizeof (struct IPv6UdpAddress))
1568 if (plugin->sockv6 == NULL)
1570 udp_a6 = (struct IPv6UdpAddress *) address->address;
1571 if (udp_a6->u6_port == 0)
1575 /* check if session already exists */
1576 struct SessionCompareContext cctx;
1577 cctx.addr = address;
1579 LOG (GNUNET_ERROR_TYPE_DEBUG,
1580 "Looking for existing session for peer `%s' `%s' \n",
1581 GNUNET_i2s (&address->peer),
1582 udp_address_to_string(NULL, address->address, address->address_length));
1583 GNUNET_CONTAINER_multihashmap_get_multiple(plugin->sessions, &address->peer.hashPubKey, session_cmp_it, &cctx);
1584 if (cctx.res != NULL)
1586 LOG (GNUNET_ERROR_TYPE_DEBUG, "Found existing session %p\n", cctx.res);
1593 static struct Session *
1594 udp_plugin_create_session (void *cls,
1595 const struct GNUNET_HELLO_Address *address)
1599 s = create_session (plugin,
1602 address->address_length,
1605 return NULL; /* protocol not supported or address invalid */
1606 LOG (GNUNET_ERROR_TYPE_DEBUG,
1607 "Creating new session %p for peer `%s' address `%s'\n",
1609 GNUNET_i2s(&address->peer),
1610 udp_address_to_string(NULL,address->address,address->address_length));
1611 GNUNET_assert (GNUNET_OK ==
1612 GNUNET_CONTAINER_multihashmap_put (plugin->sessions,
1613 &s->target.hashPubKey,
1615 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1616 GNUNET_STATISTICS_set(plugin->env->stats,
1617 "# UDP, sessions active",
1618 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1625 * Creates a new outbound session the transport service will use to send data to the
1628 * @param cls the plugin
1629 * @param address the address
1630 * @return the session or NULL of max connections exceeded
1632 static struct Session *
1633 udp_plugin_get_session (void *cls,
1634 const struct GNUNET_HELLO_Address *address)
1638 if (NULL == address)
1643 if ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1644 (address->address_length != sizeof (struct IPv6UdpAddress)))
1647 /* otherwise create new */
1648 if (NULL != (s = udp_plugin_lookup_session (cls, address)))
1650 return udp_plugin_create_session (cls, address);
1655 enqueue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1657 if (plugin->bytes_in_buffer + udpw->msg_size > INT64_MAX)
1661 GNUNET_STATISTICS_update (plugin->env->stats,
1662 "# UDP, total, bytes in buffers",
1663 udpw->msg_size, GNUNET_NO);
1664 plugin->bytes_in_buffer += udpw->msg_size;
1666 GNUNET_STATISTICS_update (plugin->env->stats,
1667 "# UDP, total, msgs in buffers",
1669 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1670 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_queue_head,
1671 plugin->ipv4_queue_tail, udpw);
1672 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1673 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_queue_head,
1674 plugin->ipv6_queue_tail, udpw);
1680 * Fragment message was transmitted via UDP, let fragmentation know
1681 * to send the next fragment now.
1683 * @param cls the 'struct UDPMessageWrapper' of the fragment
1684 * @param target destination peer (ignored)
1685 * @param result GNUNET_OK on success (ignored)
1686 * @param payload bytes payload sent
1687 * @param physical bytes physical sent
1690 send_next_fragment (void *cls,
1691 const struct GNUNET_PeerIdentity *target,
1692 int result, size_t payload, size_t physical)
1694 struct UDP_MessageWrapper *udpw = cls;
1696 GNUNET_FRAGMENT_context_transmission_done (udpw->frag_ctx->frag);
1701 * Function that is called with messages created by the fragmentation
1702 * module. In the case of the 'proc' callback of the
1703 * GNUNET_FRAGMENT_context_create function, this function must
1704 * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
1706 * @param cls closure, the 'struct FragmentationContext'
1707 * @param msg the message that was created
1710 enqueue_fragment (void *cls, const struct GNUNET_MessageHeader *msg)
1712 struct UDP_FragmentationContext *frag_ctx = cls;
1713 struct Plugin *plugin = frag_ctx->plugin;
1714 struct UDP_MessageWrapper * udpw;
1715 size_t msg_len = ntohs (msg->size);
1717 LOG (GNUNET_ERROR_TYPE_DEBUG,
1718 "Enqueuing fragment with %u bytes\n", msg_len);
1719 frag_ctx->fragments_used ++;
1720 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msg_len);
1721 udpw->session = frag_ctx->session;
1722 udpw->msg_buf = (char *) &udpw[1];
1723 udpw->msg_size = msg_len;
1724 udpw->payload_size = msg_len; /*FIXME: minus fragment overhead */
1725 udpw->cont = &send_next_fragment;
1726 udpw->cont_cls = udpw;
1727 udpw->timeout = frag_ctx->timeout;
1728 udpw->frag_ctx = frag_ctx;
1729 udpw->msg_type = MSG_FRAGMENTED;
1730 memcpy (udpw->msg_buf, msg, msg_len);
1731 enqueue (plugin, udpw);
1732 schedule_select (plugin);
1737 * Function that can be used by the transport service to transmit
1738 * a message using the plugin. Note that in the case of a
1739 * peer disconnecting, the continuation MUST be called
1740 * prior to the disconnect notification itself. This function
1741 * will be called with this peer's HELLO message to initiate
1742 * a fresh connection to another peer.
1744 * @param cls closure
1745 * @param s which session must be used
1746 * @param msgbuf the message to transmit
1747 * @param msgbuf_size number of bytes in 'msgbuf'
1748 * @param priority how important is the message (most plugins will
1749 * ignore message priority and just FIFO)
1750 * @param to how long to wait at most for the transmission (does not
1751 * require plugins to discard the message after the timeout,
1752 * just advisory for the desired delay; most plugins will ignore
1754 * @param cont continuation to call once the message has
1755 * been transmitted (or if the transport is ready
1756 * for the next transmission call; or if the
1757 * peer disconnected...); can be NULL
1758 * @param cont_cls closure for cont
1759 * @return number of bytes used (on the physical network, with overheads);
1760 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1761 * and does NOT mean that the message was not transmitted (DV)
1764 udp_plugin_send (void *cls,
1766 const char *msgbuf, size_t msgbuf_size,
1767 unsigned int priority,
1768 struct GNUNET_TIME_Relative to,
1769 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1771 struct Plugin *plugin = cls;
1772 size_t udpmlen = msgbuf_size + sizeof (struct UDPMessage);
1773 struct UDP_FragmentationContext * frag_ctx;
1774 struct UDP_MessageWrapper * udpw;
1775 struct UDPMessage *udp;
1777 GNUNET_assert (plugin != NULL);
1778 GNUNET_assert (s != NULL);
1780 if ((s->addrlen == sizeof (struct sockaddr_in6)) && (plugin->sockv6 == NULL))
1781 return GNUNET_SYSERR;
1782 if ((s->addrlen == sizeof (struct sockaddr_in)) && (plugin->sockv4 == NULL))
1783 return GNUNET_SYSERR;
1784 if (udpmlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1787 return GNUNET_SYSERR;
1789 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains_value(plugin->sessions, &s->target.hashPubKey, s))
1792 return GNUNET_SYSERR;
1794 LOG (GNUNET_ERROR_TYPE_DEBUG,
1795 "UDP transmits %u-byte message to `%s' using address `%s'\n",
1797 GNUNET_i2s (&s->target),
1798 GNUNET_a2s(s->sock_addr, s->addrlen));
1802 udp = (struct UDPMessage *) mbuf;
1803 udp->header.size = htons (udpmlen);
1804 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
1805 udp->reserved = htonl (0);
1806 udp->sender = *plugin->env->my_identity;
1808 reschedule_session_timeout(s);
1809 if (udpmlen <= UDP_MTU)
1811 /* unfragmented message */
1812 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + udpmlen);
1814 udpw->msg_buf = (char *) &udpw[1];
1815 udpw->msg_size = udpmlen; /* message size with UDP overhead */
1816 udpw->payload_size = msgbuf_size; /* message size without UDP overhead */
1817 udpw->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1819 udpw->cont_cls = cont_cls;
1820 udpw->frag_ctx = NULL;
1821 udpw->msg_type = MSG_UNFRAGMENTED;
1822 memcpy (udpw->msg_buf, udp, sizeof (struct UDPMessage));
1823 memcpy (&udpw->msg_buf[sizeof (struct UDPMessage)], msgbuf, msgbuf_size);
1824 enqueue (plugin, udpw);
1826 GNUNET_STATISTICS_update (plugin->env->stats,
1827 "# UDP, unfragmented msgs, messages, attempt",
1829 GNUNET_STATISTICS_update (plugin->env->stats,
1830 "# UDP, unfragmented msgs, bytes payload, attempt",
1831 udpw->payload_size, GNUNET_NO);
1835 /* fragmented message */
1836 if (s->frag_ctx != NULL)
1837 return GNUNET_SYSERR;
1838 memcpy (&udp[1], msgbuf, msgbuf_size);
1839 frag_ctx = GNUNET_malloc (sizeof (struct UDP_FragmentationContext));
1840 frag_ctx->plugin = plugin;
1841 frag_ctx->session = s;
1842 frag_ctx->cont = cont;
1843 frag_ctx->cont_cls = cont_cls;
1844 frag_ctx->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1845 frag_ctx->payload_size = msgbuf_size; /* unfragmented message size without UDP overhead */
1846 frag_ctx->on_wire_size = 0; /* bytes with UDP and fragmentation overhead */
1847 frag_ctx->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
1850 s->last_expected_msg_delay,
1851 s->last_expected_ack_delay,
1855 s->frag_ctx = frag_ctx;
1856 GNUNET_STATISTICS_update (plugin->env->stats,
1857 "# UDP, fragmented msgs, messages, pending",
1859 GNUNET_STATISTICS_update (plugin->env->stats,
1860 "# UDP, fragmented msgs, messages, attempt",
1862 GNUNET_STATISTICS_update (plugin->env->stats,
1863 "# UDP, fragmented msgs, bytes payload, attempt",
1864 frag_ctx->payload_size, GNUNET_NO);
1866 schedule_select (plugin);
1872 * Our external IP address/port mapping has changed.
1874 * @param cls closure, the 'struct LocalAddrList'
1875 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1876 * the previous (now invalid) one
1877 * @param addr either the previous or the new public IP address
1878 * @param addrlen actual lenght of the address
1881 udp_nat_port_map_callback (void *cls, int add_remove,
1882 const struct sockaddr *addr, socklen_t addrlen)
1884 struct Plugin *plugin = cls;
1885 struct IPv4UdpAddress u4;
1886 struct IPv6UdpAddress u6;
1890 LOG (GNUNET_ERROR_TYPE_INFO,
1891 "NAT notification to %s address `%s'\n",
1892 (GNUNET_YES == add_remove) ? "add" : "remove",
1893 GNUNET_a2s (addr, addrlen));
1895 /* convert 'addr' to our internal format */
1896 switch (addr->sa_family)
1899 GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
1900 memset (&u4, 0, sizeof (u4));
1901 u4.options = htonl(myoptions);
1902 u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1903 u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
1904 if (0 == ((struct sockaddr_in *) addr)->sin_port)
1907 args = sizeof (struct IPv4UdpAddress);
1910 GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
1911 memset (&u4, 0, sizeof (u4));
1912 u6.options = htonl(myoptions);
1913 if (0 == ((struct sockaddr_in6 *) addr)->sin6_port)
1915 memcpy (&u6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
1916 sizeof (struct in6_addr));
1917 u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
1919 args = sizeof (struct IPv6UdpAddress);
1925 /* modify our published address list */
1926 plugin->env->notify_address (plugin->env->cls, add_remove, arg, args, "udp");
1932 * Message tokenizer has broken up an incomming message. Pass it on
1935 * @param cls the 'struct Plugin'
1936 * @param client the 'struct SourceInformation'
1937 * @param hdr the actual message
1940 process_inbound_tokenized_messages (void *cls, void *client,
1941 const struct GNUNET_MessageHeader *hdr)
1943 struct Plugin *plugin = cls;
1944 struct SourceInformation *si = client;
1945 struct GNUNET_TIME_Relative delay;
1947 GNUNET_assert (si->session != NULL);
1948 if (GNUNET_YES == si->session->in_destroy)
1951 GNUNET_break (ntohl(si->session->ats.value) != GNUNET_ATS_NET_UNSPECIFIED);
1952 delay = plugin->env->receive (plugin->env->cls,
1956 (GNUNET_YES == si->session->inbound) ? NULL : si->arg,
1957 (GNUNET_YES == si->session->inbound) ? 0 : si->args);
1959 plugin->env->update_address_metrics (plugin->env->cls,
1961 (GNUNET_YES == si->session->inbound) ? NULL : si->arg,
1962 (GNUNET_YES == si->session->inbound) ? 0 : si->args,
1964 &si->session->ats, 1);
1966 si->session->flow_delay_for_other_peer = delay;
1967 reschedule_session_timeout(si->session);
1973 * We've received a UDP Message. Process it (pass contents to main service).
1975 * @param plugin plugin context
1976 * @param msg the message
1977 * @param sender_addr sender address
1978 * @param sender_addr_len number of bytes in sender_addr
1981 process_udp_message (struct Plugin *plugin, const struct UDPMessage *msg,
1982 const struct sockaddr *sender_addr,
1983 socklen_t sender_addr_len)
1985 struct SourceInformation si;
1987 struct IPv4UdpAddress u4;
1988 struct IPv6UdpAddress u6;
1992 if (0 != ntohl (msg->reserved))
1994 GNUNET_break_op (0);
1997 if (ntohs (msg->header.size) <
1998 sizeof (struct GNUNET_MessageHeader) + sizeof (struct UDPMessage))
2000 GNUNET_break_op (0);
2004 /* convert address */
2005 switch (sender_addr->sa_family)
2008 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in));
2009 memset (&u4, 0, sizeof (u4));
2010 u6.options = htonl (0);
2011 u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
2012 u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
2017 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in6));
2018 memset (&u6, 0, sizeof (u6));
2019 u6.options = htonl (0);
2020 u6.ipv6_addr = ((struct sockaddr_in6 *) sender_addr)->sin6_addr;
2021 u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
2029 LOG (GNUNET_ERROR_TYPE_DEBUG,
2030 "Received message with %u bytes from peer `%s' at `%s'\n",
2031 (unsigned int) ntohs (msg->header.size), GNUNET_i2s (&msg->sender),
2032 GNUNET_a2s (sender_addr, sender_addr_len));
2034 struct GNUNET_HELLO_Address * address = GNUNET_HELLO_address_allocate(&msg->sender, "udp", arg, args);
2035 if (NULL == (s = udp_plugin_lookup_session (plugin, address)))
2037 s = udp_plugin_create_session(plugin, address);
2038 s->inbound = GNUNET_YES;
2039 plugin->env->session_start (NULL, &address->peer, PLUGIN_NAME,
2040 (GNUNET_YES == s->inbound) ? NULL : address->address,
2041 (GNUNET_YES == s->inbound) ? 0 : address->address_length,
2044 GNUNET_free (address);
2046 /* iterate over all embedded messages */
2048 si.sender = msg->sender;
2052 GNUNET_SERVER_mst_receive (plugin->mst, &si, (const char *) &msg[1],
2053 ntohs (msg->header.size) -
2054 sizeof (struct UDPMessage), GNUNET_YES, GNUNET_NO);
2056 if ( (0 == s->rc) && (GNUNET_YES == s->in_destroy))
2062 * Scan the heap for a receive context with the given address.
2064 * @param cls the 'struct FindReceiveContext'
2065 * @param node internal node of the heap
2066 * @param element value stored at the node (a 'struct ReceiveContext')
2067 * @param cost cost associated with the node
2068 * @return GNUNET_YES if we should continue to iterate,
2072 find_receive_context (void *cls, struct GNUNET_CONTAINER_HeapNode *node,
2073 void *element, GNUNET_CONTAINER_HeapCostType cost)
2075 struct FindReceiveContext *frc = cls;
2076 struct DefragContext *e = element;
2078 if ((frc->addr_len == e->addr_len) &&
2079 (0 == memcmp (frc->addr, e->src_addr, frc->addr_len)))
2089 * Process a defragmented message.
2091 * @param cls the 'struct ReceiveContext'
2092 * @param msg the message
2095 fragment_msg_proc (void *cls, const struct GNUNET_MessageHeader *msg)
2097 struct DefragContext *rc = cls;
2099 if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
2104 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2109 process_udp_message (rc->plugin, (const struct UDPMessage *) msg,
2110 rc->src_addr, rc->addr_len);
2114 struct LookupContext
2116 const struct sockaddr * addr;
2118 struct Session *res;
2125 lookup_session_by_addr_it (void *cls, const struct GNUNET_HashCode * key, void *value)
2127 struct LookupContext *l_ctx = cls;
2128 struct Session * s = value;
2130 if ((s->addrlen == l_ctx->addrlen) &&
2131 (0 == memcmp (s->sock_addr, l_ctx->addr, s->addrlen)))
2141 * Transmit an acknowledgement.
2143 * @param cls the 'struct ReceiveContext'
2144 * @param id message ID (unused)
2145 * @param msg ack to transmit
2148 ack_proc (void *cls, uint32_t id, const struct GNUNET_MessageHeader *msg)
2150 struct DefragContext *rc = cls;
2151 size_t msize = sizeof (struct UDP_ACK_Message) + ntohs (msg->size);
2152 struct UDP_ACK_Message *udp_ack;
2154 struct UDP_MessageWrapper *udpw;
2156 struct LookupContext l_ctx;
2158 l_ctx.addr = rc->src_addr;
2159 l_ctx.addrlen = rc->addr_len;
2161 GNUNET_CONTAINER_multihashmap_iterate (rc->plugin->sessions,
2162 &lookup_session_by_addr_it,
2169 if (s->flow_delay_for_other_peer.rel_value_us <= UINT32_MAX)
2170 delay = s->flow_delay_for_other_peer.rel_value_us;
2172 LOG (GNUNET_ERROR_TYPE_DEBUG,
2173 "Sending ACK to `%s' including delay of %s\n",
2174 GNUNET_a2s (rc->src_addr,
2175 (rc->src_addr->sa_family ==
2176 AF_INET) ? sizeof (struct sockaddr_in) : sizeof (struct
2178 GNUNET_STRINGS_relative_time_to_string (s->flow_delay_for_other_peer,
2180 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msize);
2181 udpw->msg_size = msize;
2182 udpw->payload_size = 0;
2184 udpw->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
2185 udpw->msg_buf = (char *)&udpw[1];
2186 udpw->msg_type = MSG_ACK;
2187 udp_ack = (struct UDP_ACK_Message *) udpw->msg_buf;
2188 udp_ack->header.size = htons ((uint16_t) msize);
2189 udp_ack->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
2190 udp_ack->delay = htonl (delay);
2191 udp_ack->sender = *rc->plugin->env->my_identity;
2192 memcpy (&udp_ack[1], msg, ntohs (msg->size));
2193 enqueue (rc->plugin, udpw);
2198 read_process_msg (struct Plugin *plugin,
2199 const struct GNUNET_MessageHeader *msg,
2203 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2205 GNUNET_break_op (0);
2208 process_udp_message (plugin, (const struct UDPMessage *) msg,
2209 (const struct sockaddr *) addr, fromlen);
2214 read_process_ack (struct Plugin *plugin,
2215 const struct GNUNET_MessageHeader *msg,
2219 const struct GNUNET_MessageHeader *ack;
2220 const struct UDP_ACK_Message *udp_ack;
2221 struct LookupContext l_ctx;
2223 struct GNUNET_TIME_Relative flow_delay;
2225 if (ntohs (msg->size) <
2226 sizeof (struct UDP_ACK_Message) + sizeof (struct GNUNET_MessageHeader))
2228 GNUNET_break_op (0);
2231 udp_ack = (const struct UDP_ACK_Message *) msg;
2232 l_ctx.addr = (const struct sockaddr *) addr;
2233 l_ctx.addrlen = fromlen;
2235 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions,
2236 &lookup_session_by_addr_it,
2240 if ((NULL == s) || (NULL == s->frag_ctx))
2245 flow_delay.rel_value_us = (uint64_t) ntohl (udp_ack->delay);
2246 LOG (GNUNET_ERROR_TYPE_DEBUG,
2247 "We received a sending delay of %s\n",
2248 GNUNET_STRINGS_relative_time_to_string (flow_delay,
2250 s->flow_delay_from_other_peer =
2251 GNUNET_TIME_relative_to_absolute (flow_delay);
2253 ack = (const struct GNUNET_MessageHeader *) &udp_ack[1];
2254 if (ntohs (ack->size) !=
2255 ntohs (msg->size) - sizeof (struct UDP_ACK_Message))
2257 GNUNET_break_op (0);
2261 if (0 != memcmp (&l_ctx.res->target, &udp_ack->sender, sizeof (struct GNUNET_PeerIdentity)))
2263 if (GNUNET_OK != GNUNET_FRAGMENT_process_ack (s->frag_ctx->frag, ack))
2265 LOG (GNUNET_ERROR_TYPE_DEBUG,
2266 "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
2267 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2268 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2269 /* Expect more ACKs to arrive */
2273 LOG (GNUNET_ERROR_TYPE_DEBUG,
2274 "Message full ACK'ed\n",
2275 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2276 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2278 /* Remove fragmented message after successful sending */
2279 fragmented_message_done (s->frag_ctx, GNUNET_OK);
2284 read_process_fragment (struct Plugin *plugin,
2285 const struct GNUNET_MessageHeader *msg,
2289 struct DefragContext *d_ctx;
2290 struct GNUNET_TIME_Absolute now;
2291 struct FindReceiveContext frc;
2294 frc.addr = (const struct sockaddr *) addr;
2295 frc.addr_len = fromlen;
2297 LOG (GNUNET_ERROR_TYPE_DEBUG, "UDP processes %u-byte fragment from `%s'\n",
2298 (unsigned int) ntohs (msg->size),
2299 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2300 /* Lookup existing receive context for this address */
2301 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
2302 &find_receive_context,
2304 now = GNUNET_TIME_absolute_get ();
2309 /* Create a new defragmentation context */
2310 d_ctx = GNUNET_malloc (sizeof (struct DefragContext) + fromlen);
2311 memcpy (&d_ctx[1], addr, fromlen);
2312 d_ctx->src_addr = (const struct sockaddr *) &d_ctx[1];
2313 d_ctx->addr_len = fromlen;
2314 d_ctx->plugin = plugin;
2316 GNUNET_DEFRAGMENT_context_create (plugin->env->stats, UDP_MTU,
2317 UDP_MAX_MESSAGES_IN_DEFRAG, d_ctx,
2318 &fragment_msg_proc, &ack_proc);
2320 GNUNET_CONTAINER_heap_insert (plugin->defrag_ctxs, d_ctx,
2321 (GNUNET_CONTAINER_HeapCostType)
2323 LOG (GNUNET_ERROR_TYPE_DEBUG,
2324 "Created new defragmentation context for %u-byte fragment from `%s'\n",
2325 (unsigned int) ntohs (msg->size),
2326 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2330 LOG (GNUNET_ERROR_TYPE_DEBUG,
2331 "Found existing defragmentation context for %u-byte fragment from `%s'\n",
2332 (unsigned int) ntohs (msg->size),
2333 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2336 if (GNUNET_OK == GNUNET_DEFRAGMENT_process_fragment (d_ctx->defrag, msg))
2338 /* keep this 'rc' from expiring */
2339 GNUNET_CONTAINER_heap_update_cost (plugin->defrag_ctxs, d_ctx->hnode,
2340 (GNUNET_CONTAINER_HeapCostType)
2343 if (GNUNET_CONTAINER_heap_get_size (plugin->defrag_ctxs) >
2344 UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
2346 /* remove 'rc' that was inactive the longest */
2347 d_ctx = GNUNET_CONTAINER_heap_remove_root (plugin->defrag_ctxs);
2348 GNUNET_assert (NULL != d_ctx);
2349 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
2350 GNUNET_free (d_ctx);
2356 * Read and process a message from the given socket.
2358 * @param plugin the overall plugin
2359 * @param rsock socket to read from
2362 udp_select_read (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *rsock)
2366 char buf[65536] GNUNET_ALIGN;
2368 const struct GNUNET_MessageHeader *msg;
2370 fromlen = sizeof (addr);
2371 memset (&addr, 0, sizeof (addr));
2372 size = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof (buf),
2373 (struct sockaddr *) &addr, &fromlen);
2375 /* On SOCK_DGRAM UDP sockets recvfrom might fail with a
2376 * WSAECONNRESET error to indicate that previous sendto() (yes, sendto!)
2377 * on this socket has failed.
2379 * WSAECONNRESET - The virtual circuit was reset by the remote side
2380 * executing a hard or abortive close. The application should close
2381 * the socket; it is no longer usable. On a UDP-datagram socket this
2382 * error indicates a previous send operation resulted in an ICMP Port
2383 * Unreachable message.
2385 if ( (-1 == size) && (ECONNRESET == errno) )
2390 LOG (GNUNET_ERROR_TYPE_DEBUG,
2391 "UDP failed to receive data: %s\n", STRERROR (errno));
2392 /* Connection failure or something. Not a protocol violation. */
2395 if (size < sizeof (struct GNUNET_MessageHeader))
2397 LOG (GNUNET_ERROR_TYPE_WARNING,
2398 "UDP got %u bytes, which is not enough for a GNUnet message header\n",
2399 (unsigned int) size);
2400 /* _MAY_ be a connection failure (got partial message) */
2401 /* But it _MAY_ also be that the other side uses non-GNUnet protocol. */
2402 GNUNET_break_op (0);
2405 msg = (const struct GNUNET_MessageHeader *) buf;
2407 LOG (GNUNET_ERROR_TYPE_DEBUG,
2408 "UDP received %u-byte message from `%s' type %i\n", (unsigned int) size,
2409 GNUNET_a2s ((const struct sockaddr *) addr, fromlen), ntohs (msg->type));
2411 if (size != ntohs (msg->size))
2413 GNUNET_break_op (0);
2417 GNUNET_STATISTICS_update (plugin->env->stats,
2418 "# UDP, total, bytes, received",
2421 switch (ntohs (msg->type))
2423 case GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON:
2424 udp_broadcast_receive (plugin, &buf, size, addr, fromlen);
2427 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
2428 read_process_msg (plugin, msg, addr, fromlen);
2431 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
2432 read_process_ack (plugin, msg, addr, fromlen);
2435 case GNUNET_MESSAGE_TYPE_FRAGMENT:
2436 read_process_fragment (plugin, msg, addr, fromlen);
2440 GNUNET_break_op (0);
2446 static struct UDP_MessageWrapper *
2447 remove_timeout_messages_and_select (struct UDP_MessageWrapper *head,
2448 struct GNUNET_NETWORK_Handle *sock)
2450 struct UDP_MessageWrapper *udpw = NULL;
2451 struct GNUNET_TIME_Relative remaining;
2454 while (udpw != NULL)
2456 /* Find messages with timeout */
2457 remaining = GNUNET_TIME_absolute_get_remaining (udpw->timeout);
2458 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2460 /* Message timed out */
2461 switch (udpw->msg_type) {
2462 case MSG_UNFRAGMENTED:
2463 GNUNET_STATISTICS_update (plugin->env->stats,
2464 "# UDP, total, bytes, sent, timeout",
2465 udpw->msg_size, GNUNET_NO);
2466 GNUNET_STATISTICS_update (plugin->env->stats,
2467 "# UDP, total, messages, sent, timeout",
2469 GNUNET_STATISTICS_update (plugin->env->stats,
2470 "# UDP, unfragmented msgs, messages, sent, timeout",
2472 GNUNET_STATISTICS_update (plugin->env->stats,
2473 "# UDP, unfragmented msgs, bytes, sent, timeout",
2474 udpw->payload_size, GNUNET_NO);
2475 /* Not fragmented message */
2476 LOG (GNUNET_ERROR_TYPE_DEBUG,
2477 "Message for peer `%s' with size %u timed out\n",
2478 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2479 call_continuation (udpw, GNUNET_SYSERR);
2480 /* Remove message */
2481 dequeue (plugin, udpw);
2484 case MSG_FRAGMENTED:
2485 /* Fragmented message */
2486 GNUNET_STATISTICS_update (plugin->env->stats,
2487 "# UDP, total, bytes, sent, timeout",
2488 udpw->frag_ctx->on_wire_size, GNUNET_NO);
2489 GNUNET_STATISTICS_update (plugin->env->stats,
2490 "# UDP, total, messages, sent, timeout",
2492 call_continuation (udpw, GNUNET_SYSERR);
2493 LOG (GNUNET_ERROR_TYPE_DEBUG,
2494 "Fragment for message for peer `%s' with size %u timed out\n",
2495 GNUNET_i2s(&udpw->session->target), udpw->frag_ctx->payload_size);
2498 GNUNET_STATISTICS_update (plugin->env->stats,
2499 "# UDP, fragmented msgs, messages, sent, timeout",
2501 GNUNET_STATISTICS_update (plugin->env->stats,
2502 "# UDP, fragmented msgs, bytes, sent, timeout",
2503 udpw->frag_ctx->payload_size, GNUNET_NO);
2504 /* Remove fragmented message due to timeout */
2505 fragmented_message_done (udpw->frag_ctx, GNUNET_SYSERR);
2508 GNUNET_STATISTICS_update (plugin->env->stats,
2509 "# UDP, total, bytes, sent, timeout",
2510 udpw->msg_size, GNUNET_NO);
2511 GNUNET_STATISTICS_update (plugin->env->stats,
2512 "# UDP, total, messages, sent, timeout",
2514 LOG (GNUNET_ERROR_TYPE_DEBUG,
2515 "ACK Message for peer `%s' with size %u timed out\n",
2516 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2517 call_continuation (udpw, GNUNET_SYSERR);
2518 dequeue (plugin, udpw);
2524 if (sock == plugin->sockv4)
2525 udpw = plugin->ipv4_queue_head;
2526 else if (sock == plugin->sockv6)
2527 udpw = plugin->ipv6_queue_head;
2530 GNUNET_break (0); /* should never happen */
2533 GNUNET_STATISTICS_update (plugin->env->stats,
2534 "# messages dismissed due to timeout",
2539 /* Message did not time out, check flow delay */
2540 remaining = GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer);
2541 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2543 /* this message is not delayed */
2544 LOG (GNUNET_ERROR_TYPE_DEBUG,
2545 "Message for peer `%s' (%u bytes) is not delayed \n",
2546 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2547 break; /* Found message to send, break */
2551 /* Message is delayed, try next */
2552 LOG (GNUNET_ERROR_TYPE_DEBUG,
2553 "Message for peer `%s' (%u bytes) is delayed for %s\n",
2554 GNUNET_i2s(&udpw->session->target), udpw->payload_size,
2555 GNUNET_STRINGS_relative_time_to_string (remaining,
2566 analyze_send_error (struct Plugin *plugin,
2567 const struct sockaddr * sa,
2571 static int network_down_error;
2572 struct GNUNET_ATS_Information type;
2574 type = plugin->env->get_address_type (plugin->env->cls,sa, slen);
2575 if (((GNUNET_ATS_NET_LAN == ntohl(type.value)) || (GNUNET_ATS_NET_WAN == ntohl(type.value))) &&
2576 ((ENETUNREACH == errno) || (ENETDOWN == errno)))
2578 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in)))
2580 /* IPv4: "Network unreachable" or "Network down"
2582 * This indicates we do not have connectivity
2584 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2585 _("UDP could not transmit message to `%s': "
2586 "Network seems down, please check your network configuration\n"),
2587 GNUNET_a2s (sa, slen));
2589 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in6)))
2591 /* IPv6: "Network unreachable" or "Network down"
2593 * This indicates that this system is IPv6 enabled, but does not
2594 * have a valid global IPv6 address assigned or we do not have
2598 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2599 _("UDP could not transmit message to `%s': "
2600 "Please check your network configuration and disable IPv6 if your "
2601 "connection does not have a global IPv6 address\n"),
2602 GNUNET_a2s (sa, slen));
2607 LOG (GNUNET_ERROR_TYPE_WARNING,
2608 "UDP could not transmit message to `%s': `%s'\n",
2609 GNUNET_a2s (sa, slen), STRERROR (error));
2615 udp_select_send (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *sock)
2617 const struct sockaddr * sa;
2621 struct UDP_MessageWrapper *udpw = NULL;
2623 /* Find message to send */
2624 udpw = remove_timeout_messages_and_select ((sock == plugin->sockv4) ? plugin->ipv4_queue_head : plugin->ipv6_queue_head,
2627 return 0; /* No message to send */
2629 sa = udpw->session->sock_addr;
2630 slen = udpw->session->addrlen;
2632 sent = GNUNET_NETWORK_socket_sendto (sock, udpw->msg_buf, udpw->msg_size, sa, slen);
2634 if (GNUNET_SYSERR == sent)
2637 analyze_send_error (plugin, sa, slen, errno);
2638 call_continuation(udpw, GNUNET_SYSERR);
2639 GNUNET_STATISTICS_update (plugin->env->stats,
2640 "# UDP, total, bytes, sent, failure",
2642 GNUNET_STATISTICS_update (plugin->env->stats,
2643 "# UDP, total, messages, sent, failure",
2649 LOG (GNUNET_ERROR_TYPE_DEBUG,
2650 "UDP transmitted %u-byte message to `%s' `%s' (%d: %s)\n",
2651 (unsigned int) (udpw->msg_size), GNUNET_i2s(&udpw->session->target) ,GNUNET_a2s (sa, slen), (int) sent,
2652 (sent < 0) ? STRERROR (errno) : "ok");
2653 GNUNET_STATISTICS_update (plugin->env->stats,
2654 "# UDP, total, bytes, sent, success",
2656 GNUNET_STATISTICS_update (plugin->env->stats,
2657 "# UDP, total, messages, sent, success",
2659 if (NULL != udpw->frag_ctx)
2660 udpw->frag_ctx->on_wire_size += udpw->msg_size;
2661 call_continuation (udpw, GNUNET_OK);
2663 dequeue (plugin, udpw);
2672 * We have been notified that our readset has something to read. We don't
2673 * know which socket needs to be read, so we have to check each one
2674 * Then reschedule this function to be called again once more is available.
2676 * @param cls the plugin handle
2677 * @param tc the scheduling context (for rescheduling this function again)
2680 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2682 struct Plugin *plugin = cls;
2684 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
2685 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2687 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
2688 (NULL != plugin->sockv4) &&
2689 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv4)) )
2690 udp_select_read (plugin, plugin->sockv4);
2691 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2692 (NULL != plugin->sockv4) &&
2693 (NULL != plugin->ipv4_queue_head) &&
2694 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv4)) )
2695 udp_select_send (plugin, plugin->sockv4);
2696 schedule_select (plugin);
2701 * We have been notified that our readset has something to read. We don't
2702 * know which socket needs to be read, so we have to check each one
2703 * Then reschedule this function to be called again once more is available.
2705 * @param cls the plugin handle
2706 * @param tc the scheduling context (for rescheduling this function again)
2709 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2711 struct Plugin *plugin = cls;
2713 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2714 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2716 if ( ((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0) &&
2717 (NULL != plugin->sockv6) &&
2718 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv6)) )
2719 udp_select_read (plugin, plugin->sockv6);
2720 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2721 (NULL != plugin->sockv6) && (plugin->ipv6_queue_head != NULL) &&
2722 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv6)) )
2723 udp_select_send (plugin, plugin->sockv6);
2724 schedule_select (plugin);
2730 * @return number of sockets that were successfully bound
2733 setup_sockets (struct Plugin *plugin,
2734 const struct sockaddr_in6 *bind_v6,
2735 const struct sockaddr_in *bind_v4)
2738 int sockets_created = 0;
2739 struct sockaddr_in6 serverAddrv6;
2740 struct sockaddr_in serverAddrv4;
2741 struct sockaddr *serverAddr;
2742 struct sockaddr *addrs[2];
2743 socklen_t addrlens[2];
2747 /* Create IPv6 socket */
2749 if (plugin->enable_ipv6 == GNUNET_YES)
2751 plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
2752 if (NULL == plugin->sockv6)
2754 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2755 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv6 since it is not supported on this system!\n");
2756 plugin->enable_ipv6 = GNUNET_NO;
2760 memset (&serverAddrv6, '\0', sizeof (struct sockaddr_in6));
2761 #if HAVE_SOCKADDR_IN_SIN_LEN
2762 serverAddrv6.sin6_len = sizeof (struct sockaddr_in6);
2764 serverAddrv6.sin6_family = AF_INET6;
2765 if (NULL != bind_v6)
2766 serverAddrv6.sin6_addr = bind_v6->sin6_addr;
2768 serverAddrv6.sin6_addr = in6addr_any;
2770 if (0 == plugin->port) /* autodetect */
2771 serverAddrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2773 serverAddrv6.sin6_port = htons (plugin->port);
2774 addrlen = sizeof (struct sockaddr_in6);
2775 serverAddr = (struct sockaddr *) &serverAddrv6;
2780 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv6 `%s'\n",
2781 GNUNET_a2s (serverAddr, addrlen));
2783 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv6,
2784 serverAddr, addrlen, 0))
2787 if (0 != plugin->port)
2789 tries = 10; /* fail */
2790 break; /* bind failed on specific port */
2793 serverAddrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2798 GNUNET_NETWORK_socket_close (plugin->sockv6);
2799 plugin->enable_ipv6 = GNUNET_NO;
2800 plugin->sockv6 = NULL;
2803 if (plugin->sockv6 != NULL)
2805 LOG (GNUNET_ERROR_TYPE_DEBUG,
2806 "IPv6 socket created on port %s\n",
2807 GNUNET_a2s (serverAddr, addrlen));
2808 addrs[sockets_created] = (struct sockaddr *) &serverAddrv6;
2809 addrlens[sockets_created] = sizeof (struct sockaddr_in6);
2814 LOG (GNUNET_ERROR_TYPE_ERROR,
2815 "Failed to bind UDP socket to %s: %s\n",
2816 GNUNET_a2s (serverAddr, addrlen),
2822 /* Create IPv4 socket */
2824 plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
2825 if (NULL == plugin->sockv4)
2827 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2828 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv4 since it is not supported on this system!\n");
2829 plugin->enable_ipv4 = GNUNET_NO;
2833 memset (&serverAddrv4, '\0', sizeof (struct sockaddr_in));
2834 #if HAVE_SOCKADDR_IN_SIN_LEN
2835 serverAddrv4.sin_len = sizeof (struct sockaddr_in);
2837 serverAddrv4.sin_family = AF_INET;
2838 if (NULL != bind_v4)
2839 serverAddrv4.sin_addr = bind_v4->sin_addr;
2841 serverAddrv4.sin_addr.s_addr = INADDR_ANY;
2843 if (0 == plugin->port)
2845 serverAddrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2847 serverAddrv4.sin_port = htons (plugin->port);
2850 addrlen = sizeof (struct sockaddr_in);
2851 serverAddr = (struct sockaddr *) &serverAddrv4;
2856 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv4 `%s'\n",
2857 GNUNET_a2s (serverAddr, addrlen));
2860 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv4,
2861 serverAddr, addrlen, 0))
2864 if (0 != plugin->port)
2866 tries = 10; /* fail */
2867 break; /* bind failed on specific port */
2871 serverAddrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2877 GNUNET_NETWORK_socket_close (plugin->sockv4);
2878 plugin->enable_ipv4 = GNUNET_NO;
2879 plugin->sockv4 = NULL;
2882 if (plugin->sockv4 != NULL)
2884 LOG (GNUNET_ERROR_TYPE_DEBUG,
2885 "IPv4 socket created on port %s\n", GNUNET_a2s (serverAddr, addrlen));
2886 addrs[sockets_created] = (struct sockaddr *) &serverAddrv4;
2887 addrlens[sockets_created] = sizeof (struct sockaddr_in);
2892 LOG (GNUNET_ERROR_TYPE_ERROR,
2893 "Failed to bind UDP socket to %s: %s\n",
2894 GNUNET_a2s (serverAddr, addrlen), STRERROR (eno));
2898 if (0 == sockets_created)
2900 LOG (GNUNET_ERROR_TYPE_WARNING, _("Failed to open UDP sockets\n"));
2901 return 0; /* No sockets created, return */
2904 /* Create file descriptors */
2905 if (plugin->enable_ipv4 == GNUNET_YES)
2907 plugin->rs_v4 = GNUNET_NETWORK_fdset_create ();
2908 plugin->ws_v4 = GNUNET_NETWORK_fdset_create ();
2909 GNUNET_NETWORK_fdset_zero (plugin->rs_v4);
2910 GNUNET_NETWORK_fdset_zero (plugin->ws_v4);
2911 if (NULL != plugin->sockv4)
2913 GNUNET_NETWORK_fdset_set (plugin->rs_v4, plugin->sockv4);
2914 GNUNET_NETWORK_fdset_set (plugin->ws_v4, plugin->sockv4);
2918 if (plugin->enable_ipv6 == GNUNET_YES)
2920 plugin->rs_v6 = GNUNET_NETWORK_fdset_create ();
2921 plugin->ws_v6 = GNUNET_NETWORK_fdset_create ();
2922 GNUNET_NETWORK_fdset_zero (plugin->rs_v6);
2923 GNUNET_NETWORK_fdset_zero (plugin->ws_v6);
2924 if (NULL != plugin->sockv6)
2926 GNUNET_NETWORK_fdset_set (plugin->rs_v6, plugin->sockv6);
2927 GNUNET_NETWORK_fdset_set (plugin->ws_v6, plugin->sockv6);
2931 schedule_select (plugin);
2932 plugin->nat = GNUNET_NAT_register (plugin->env->cfg,
2933 GNUNET_NO, plugin->port,
2935 (const struct sockaddr **) addrs, addrlens,
2936 &udp_nat_port_map_callback, NULL, plugin);
2938 return sockets_created;
2943 * The exported method. Makes the core api available via a global and
2944 * returns the udp transport API.
2946 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
2947 * @return our 'struct GNUNET_TRANSPORT_PluginFunctions'
2950 libgnunet_plugin_transport_udp_init (void *cls)
2952 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2953 struct GNUNET_TRANSPORT_PluginFunctions *api;
2955 unsigned long long port;
2956 unsigned long long aport;
2957 unsigned long long broadcast;
2958 unsigned long long udp_max_bps;
2959 unsigned long long enable_v6;
2960 char * bind4_address;
2961 char * bind6_address;
2962 char * fancy_interval;
2963 struct GNUNET_TIME_Relative interval;
2964 struct sockaddr_in serverAddrv4;
2965 struct sockaddr_in6 serverAddrv6;
2970 if (NULL == env->receive)
2972 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
2973 initialze the plugin or the API */
2974 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
2976 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
2977 api->address_to_string = &udp_address_to_string;
2978 api->string_to_address = &udp_string_to_address;
2982 GNUNET_assert (NULL != env->stats);
2984 /* Get port number: port == 0 : autodetect a port,
2985 * > 0 : use this port,
2986 * not given : 2086 default */
2988 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp", "PORT",
2992 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
2993 "ADVERTISED_PORT", &aport))
2997 LOG (GNUNET_ERROR_TYPE_WARNING,
2998 _("Given `%s' option is out of range: %llu > %u\n"), "PORT", port,
3005 GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "nat",
3007 enable_v6 = GNUNET_NO;
3009 enable_v6 = GNUNET_YES;
3012 have_bind4 = GNUNET_NO;
3013 memset (&serverAddrv4, 0, sizeof (serverAddrv4));
3015 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3016 "BINDTO", &bind4_address))
3018 LOG (GNUNET_ERROR_TYPE_DEBUG,
3019 "Binding udp plugin to specific address: `%s'\n",
3021 if (1 != inet_pton (AF_INET, bind4_address, &serverAddrv4.sin_addr))
3023 GNUNET_free (bind4_address);
3026 have_bind4 = GNUNET_YES;
3028 GNUNET_free_non_null (bind4_address);
3029 have_bind6 = GNUNET_NO;
3030 memset (&serverAddrv6, 0, sizeof (serverAddrv6));
3032 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3033 "BINDTO6", &bind6_address))
3035 LOG (GNUNET_ERROR_TYPE_DEBUG,
3036 "Binding udp plugin to specific address: `%s'\n",
3039 inet_pton (AF_INET6, bind6_address, &serverAddrv6.sin6_addr))
3041 LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid IPv6 address: `%s'\n"),
3043 GNUNET_free (bind6_address);
3046 have_bind6 = GNUNET_YES;
3048 GNUNET_free_non_null (bind6_address);
3050 /* Initialize my flags */
3053 /* Enable neighbour discovery */
3054 broadcast = GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "transport-udp",
3056 if (broadcast == GNUNET_SYSERR)
3057 broadcast = GNUNET_NO;
3059 if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3060 "BROADCAST_INTERVAL", &fancy_interval))
3062 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
3066 if (GNUNET_SYSERR == GNUNET_STRINGS_fancy_time_to_relative(fancy_interval, &interval))
3068 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30);
3070 GNUNET_free (fancy_interval);
3073 /* Maximum datarate */
3074 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3075 "MAX_BPS", &udp_max_bps))
3077 udp_max_bps = 1024 * 1024 * 50; /* 50 MB/s == infinity for practical purposes */
3080 p = GNUNET_malloc (sizeof (struct Plugin));
3083 p->broadcast_interval = interval;
3084 p->enable_ipv6 = enable_v6;
3085 p->enable_ipv4 = GNUNET_YES; /* default */
3087 p->sessions = GNUNET_CONTAINER_multihashmap_create (10, GNUNET_NO);
3088 p->defrag_ctxs = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
3089 p->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages, p);
3090 GNUNET_BANDWIDTH_tracker_init (&p->tracker,
3091 GNUNET_BANDWIDTH_value_init ((uint32_t)udp_max_bps), 30);
3094 LOG (GNUNET_ERROR_TYPE_DEBUG, "Setting up sockets\n");
3095 res = setup_sockets (p, (GNUNET_YES == have_bind6) ? &serverAddrv6 : NULL,
3096 (GNUNET_YES == have_bind4) ? &serverAddrv4 : NULL);
3097 if ((res == 0) || ((p->sockv4 == NULL) && (p->sockv6 == NULL)))
3099 LOG (GNUNET_ERROR_TYPE_ERROR,
3100 _("Failed to create network sockets, plugin failed\n"));
3101 GNUNET_CONTAINER_multihashmap_destroy (p->sessions);
3102 GNUNET_CONTAINER_heap_destroy (p->defrag_ctxs);
3103 GNUNET_SERVER_mst_destroy (p->mst);
3107 else if (broadcast == GNUNET_YES)
3109 LOG (GNUNET_ERROR_TYPE_DEBUG, "Starting broadcasting\n");
3110 setup_broadcast (p, &serverAddrv6, &serverAddrv4);
3113 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
3116 api->disconnect = &udp_disconnect;
3117 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3118 api->address_to_string = &udp_address_to_string;
3119 api->string_to_address = &udp_string_to_address;
3120 api->check_address = &udp_plugin_check_address;
3121 api->get_session = &udp_plugin_get_session;
3122 api->send = &udp_plugin_send;
3123 api->get_network = &udp_get_network;
3130 heap_cleanup_iterator (void *cls,
3131 struct GNUNET_CONTAINER_HeapNode *
3132 node, void *element,
3133 GNUNET_CONTAINER_HeapCostType
3136 struct DefragContext * d_ctx = element;
3138 GNUNET_CONTAINER_heap_remove_node (node);
3139 GNUNET_DEFRAGMENT_context_destroy(d_ctx->defrag);
3140 GNUNET_free (d_ctx);
3147 * The exported method. Makes the core api available via a global and
3148 * returns the udp transport API.
3150 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
3154 libgnunet_plugin_transport_udp_done (void *cls)
3156 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
3157 struct Plugin *plugin = api->cls;
3158 struct PrettyPrinterContext *cur;
3159 struct PrettyPrinterContext *next;
3167 stop_broadcast (plugin);
3168 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
3170 GNUNET_SCHEDULER_cancel (plugin->select_task);
3171 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
3173 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK)
3175 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
3176 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
3179 /* Closing sockets */
3180 if (GNUNET_YES ==plugin->enable_ipv4)
3182 if (plugin->sockv4 != NULL)
3184 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
3185 plugin->sockv4 = NULL;
3187 GNUNET_NETWORK_fdset_destroy (plugin->rs_v4);
3188 GNUNET_NETWORK_fdset_destroy (plugin->ws_v4);
3190 if (GNUNET_YES ==plugin->enable_ipv6)
3192 if (plugin->sockv6 != NULL)
3194 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
3195 plugin->sockv6 = NULL;
3197 GNUNET_NETWORK_fdset_destroy (plugin->rs_v6);
3198 GNUNET_NETWORK_fdset_destroy (plugin->ws_v6);
3201 if (NULL != plugin->nat)
3202 GNUNET_NAT_unregister (plugin->nat);
3204 if (plugin->defrag_ctxs != NULL)
3206 GNUNET_CONTAINER_heap_iterate(plugin->defrag_ctxs,
3207 heap_cleanup_iterator, NULL);
3208 GNUNET_CONTAINER_heap_destroy(plugin->defrag_ctxs);
3209 plugin->defrag_ctxs = NULL;
3211 if (plugin->mst != NULL)
3213 GNUNET_SERVER_mst_destroy(plugin->mst);
3217 /* Clean up leftover messages */
3218 struct UDP_MessageWrapper * udpw;
3219 udpw = plugin->ipv4_queue_head;
3220 while (udpw != NULL)
3222 struct UDP_MessageWrapper *tmp = udpw->next;
3223 dequeue (plugin, udpw);
3224 call_continuation(udpw, GNUNET_SYSERR);
3229 udpw = plugin->ipv6_queue_head;
3230 while (udpw != NULL)
3232 struct UDP_MessageWrapper *tmp = udpw->next;
3233 dequeue (plugin, udpw);
3234 call_continuation(udpw, GNUNET_SYSERR);
3240 /* Clean up sessions */
3241 LOG (GNUNET_ERROR_TYPE_DEBUG,
3242 "Cleaning up sessions\n");
3243 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions, &disconnect_and_free_it, plugin);
3244 GNUNET_CONTAINER_multihashmap_destroy (plugin->sessions);
3246 next = ppc_dll_head;
3247 for (cur = next; NULL != cur; cur = next)
3250 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, cur);
3251 GNUNET_RESOLVER_request_cancel (cur->resolver_handle);
3252 GNUNET_SCHEDULER_cancel (cur->timeout_task);
3258 GNUNET_free (plugin);
3261 struct Allocation *allocation;
3262 while (NULL != ahead)
3265 GNUNET_CONTAINER_DLL_remove (ahead, atail, allocation);
3266 GNUNET_free (allocation);
3268 struct Allocator *allocator;
3269 while (NULL != aehead)
3272 GNUNET_CONTAINER_DLL_remove (aehead, aetail, allocator);
3273 GNUNET_free (allocator);
3280 /* end of plugin_transport_udp.c */