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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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;
200 * Closure for 'process_inbound_tokenized_messages'
202 struct SourceInformation
207 struct GNUNET_PeerIdentity sender;
214 struct Session *session;
216 * Number of bytes in source address.
224 * Closure for 'find_receive_context'.
226 struct FindReceiveContext
229 * Where to store the result.
231 struct DefragContext *rc;
236 const struct sockaddr *addr;
238 struct Session *session;
241 * Number of bytes in 'addr'.
250 * Data structure to track defragmentation contexts based
251 * on the source of the UDP traffic.
257 * Defragmentation context.
259 struct GNUNET_DEFRAGMENT_Context *defrag;
262 * Source address this receive context is for (allocated at the
263 * end of the struct).
265 const struct sockaddr *src_addr;
268 * Reference to master plugin struct.
270 struct Plugin *plugin;
273 * Node in the defrag heap.
275 struct GNUNET_CONTAINER_HeapNode *hnode;
278 * Length of 'src_addr'
286 * Context to send fragmented messages
288 struct UDP_FragmentationContext
291 * Next in linked list
293 struct UDP_FragmentationContext * next;
296 * Previous in linked list
298 struct UDP_FragmentationContext * prev;
303 struct Plugin * plugin;
306 * Handle for GNUNET_FRAGMENT context
308 struct GNUNET_FRAGMENT_Context * frag;
311 * The session this fragmentation context belongs to
313 struct Session * session;
316 * Function to call upon completion of the transmission.
318 GNUNET_TRANSPORT_TransmitContinuation cont;
321 * Closure for 'cont'.
328 struct GNUNET_TIME_Absolute timeout;
331 * Payload size of original unfragmented message
336 * Bytes used to send all fragments on wire including UDP overhead
340 unsigned int fragments_used;
345 struct UDP_MessageWrapper
348 * Session this message belongs to
350 struct Session *session;
356 struct UDP_MessageWrapper *prev;
362 struct UDP_MessageWrapper *next;
366 * According to UDP_MessageType
371 * Message with size msg_size including UDP specific overhead
376 * Size of UDP message to send including UDP specific overhead
381 * Payload size of original message
388 struct GNUNET_TIME_Absolute timeout;
391 * Function to call upon completion of the transmission.
393 GNUNET_TRANSPORT_TransmitContinuation cont;
396 * Closure for 'cont'.
401 * Fragmentation context
402 * frag_ctx == NULL if transport <= MTU
403 * frag_ctx != NULL if transport > MTU
405 struct UDP_FragmentationContext *frag_ctx;
410 * UDP ACK Message-Packet header (after defragmentation).
412 struct UDP_ACK_Message
417 struct GNUNET_MessageHeader header;
420 * Desired delay for flow control
425 * What is the identity of the sender
427 struct GNUNET_PeerIdentity sender;
434 static uint32_t myoptions;
438 * Encapsulation of all of the state of the plugin.
440 struct Plugin * plugin;
444 * We have been notified that our readset has something to read. We don't
445 * know which socket needs to be read, so we have to check each one
446 * Then reschedule this function to be called again once more is available.
448 * @param cls the plugin handle
449 * @param tc the scheduling context (for rescheduling this function again)
452 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
456 * We have been notified that our readset has something to read. We don't
457 * know which socket needs to be read, so we have to check each one
458 * Then reschedule this function to be called again once more is available.
460 * @param cls the plugin handle
461 * @param tc the scheduling context (for rescheduling this function again)
464 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
471 stop_session_timeout (struct Session *s)
473 GNUNET_assert (NULL != s);
475 if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
477 GNUNET_SCHEDULER_cancel (s->timeout_task);
478 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
479 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
480 "Timeout stopped for session %p canceled\n",
487 * (re)schedule select tasks for this plugin.
489 * @param plugin plugin to reschedule
492 schedule_select (struct Plugin *plugin)
494 struct GNUNET_TIME_Relative min_delay;
495 struct UDP_MessageWrapper *udpw;
497 if ((GNUNET_YES == plugin->enable_ipv4) && (NULL != plugin->sockv4))
499 /* Find a message ready to send:
500 * Flow delay from other peer is expired or not set (0) */
501 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
502 for (udpw = plugin->ipv4_queue_head; NULL != udpw; udpw = udpw->next)
503 min_delay = GNUNET_TIME_relative_min (min_delay,
504 GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer));
506 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
507 GNUNET_SCHEDULER_cancel(plugin->select_task);
510 * - write active set if message is ready
511 * - timeout minimum delay */
512 plugin->select_task =
513 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
514 (0 == min_delay.rel_value_us) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
516 (0 == min_delay.rel_value_us) ? plugin->ws_v4 : NULL,
517 &udp_plugin_select, plugin);
519 if ((GNUNET_YES == plugin->enable_ipv6) && (NULL != plugin->sockv6))
521 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
522 for (udpw = plugin->ipv6_queue_head; NULL != udpw; udpw = udpw->next)
523 min_delay = GNUNET_TIME_relative_min (min_delay,
524 GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer));
526 if (GNUNET_SCHEDULER_NO_TASK != plugin->select_task_v6)
527 GNUNET_SCHEDULER_cancel(plugin->select_task_v6);
528 plugin->select_task_v6 =
529 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
530 (0 == min_delay.rel_value_us) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
532 (0 == min_delay.rel_value_us) ? plugin->ws_v6 : NULL,
533 &udp_plugin_select_v6, plugin);
539 * Function called for a quick conversion of the binary address to
540 * a numeric address. Note that the caller must not free the
541 * address and that the next call to this function is allowed
542 * to override the address again.
545 * @param addr binary address
546 * @param addrlen length of the address
547 * @return string representing the same address
550 udp_address_to_string (void *cls, const void *addr, size_t addrlen)
552 static char rbuf[INET6_ADDRSTRLEN + 10];
553 char buf[INET6_ADDRSTRLEN];
557 const struct IPv4UdpAddress *t4;
558 const struct IPv6UdpAddress *t6;
563 if ((NULL != addr) && (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 ((NULL != addr) && (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;
798 if (addrlen == sizeof (struct IPv6UdpAddress))
801 memset (&a6, 0, sizeof (a6));
802 a6.sin6_family = AF_INET6;
803 #if HAVE_SOCKADDR_IN_SIN_LEN
804 a6.sin6_len = sizeof (a6);
806 a6.sin6_port = u6->u6_port;
807 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof (struct in6_addr));
808 port = ntohs (u6->u6_port);
809 options = ntohl (u6->options);
813 else if (addrlen == sizeof (struct IPv4UdpAddress))
816 memset (&a4, 0, sizeof (a4));
817 a4.sin_family = AF_INET;
818 #if HAVE_SOCKADDR_IN_SIN_LEN
819 a4.sin_len = sizeof (a4);
821 a4.sin_port = u4->u4_port;
822 a4.sin_addr.s_addr = u4->ipv4_addr;
823 port = ntohs (u4->u4_port);
824 options = ntohl (u4->options);
828 else if (0 == addrlen)
830 asc (asc_cls, TRANSPORT_SESSION_INBOUND_STRING);
836 /* invalid address */
841 ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
843 ppc->asc_cls = asc_cls;
845 ppc->options = options;
846 if (addrlen == sizeof (struct IPv6UdpAddress))
847 ppc->ipv6 = GNUNET_YES;
849 ppc->ipv6 = GNUNET_NO;
850 ppc->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply(timeout, 2),
851 &ppc_cancel_task, ppc);
852 GNUNET_CONTAINER_DLL_insert (ppc_dll_head, ppc_dll_tail, ppc);
853 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "PPC %p was created!\n", ppc); */
854 ppc->resolver_handle = GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric, timeout, &append_port, ppc);
860 call_continuation (struct UDP_MessageWrapper *udpw, int result)
864 LOG (GNUNET_ERROR_TYPE_DEBUG,
865 "Calling continuation for %u byte message to `%s' with result %s\n",
866 udpw->payload_size, GNUNET_i2s (&udpw->session->target),
867 (GNUNET_OK == result) ? "OK" : "SYSERR");
869 if (udpw->msg_size >= udpw->payload_size)
870 overhead = udpw->msg_size - udpw->payload_size;
872 overhead = udpw->msg_size;
876 switch (udpw->msg_type) {
877 case MSG_UNFRAGMENTED:
878 if (NULL != udpw->cont)
880 /* Transport continuation */
881 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
882 udpw->payload_size, udpw->msg_size);
884 GNUNET_STATISTICS_update (plugin->env->stats,
885 "# UDP, unfragmented msgs, messages, sent, success",
887 GNUNET_STATISTICS_update (plugin->env->stats,
888 "# UDP, unfragmented msgs, bytes payload, sent, success",
889 udpw->payload_size, GNUNET_NO);
890 GNUNET_STATISTICS_update (plugin->env->stats,
891 "# UDP, unfragmented msgs, bytes overhead, sent, success",
892 overhead, GNUNET_NO);
893 GNUNET_STATISTICS_update (plugin->env->stats,
894 "# UDP, total, bytes overhead, sent",
895 overhead, GNUNET_NO);
896 GNUNET_STATISTICS_update (plugin->env->stats,
897 "# UDP, total, bytes payload, sent",
898 udpw->payload_size, GNUNET_NO);
900 case MSG_FRAGMENTED_COMPLETE:
901 GNUNET_assert (NULL != udpw->frag_ctx);
902 if (udpw->frag_ctx->cont != NULL)
903 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_OK,
904 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
905 GNUNET_STATISTICS_update (plugin->env->stats,
906 "# UDP, fragmented msgs, messages, sent, success",
908 GNUNET_STATISTICS_update (plugin->env->stats,
909 "# UDP, fragmented msgs, bytes payload, sent, success",
910 udpw->payload_size, GNUNET_NO);
911 GNUNET_STATISTICS_update (plugin->env->stats,
912 "# UDP, fragmented msgs, bytes overhead, sent, success",
913 overhead, GNUNET_NO);
914 GNUNET_STATISTICS_update (plugin->env->stats,
915 "# UDP, total, bytes overhead, sent",
916 overhead, GNUNET_NO);
917 GNUNET_STATISTICS_update (plugin->env->stats,
918 "# UDP, total, bytes payload, sent",
919 udpw->payload_size, GNUNET_NO);
920 GNUNET_STATISTICS_update (plugin->env->stats,
921 "# UDP, fragmented msgs, messages, pending",
925 /* Fragmented message: enqueue next fragment */
926 if (NULL != udpw->cont)
927 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
928 udpw->payload_size, udpw->msg_size);
929 GNUNET_STATISTICS_update (plugin->env->stats,
930 "# UDP, fragmented msgs, fragments, sent, success",
932 GNUNET_STATISTICS_update (plugin->env->stats,
933 "# UDP, fragmented msgs, fragments bytes, sent, success",
934 udpw->msg_size, GNUNET_NO);
937 /* No continuation */
938 GNUNET_STATISTICS_update (plugin->env->stats,
939 "# UDP, ACK msgs, messages, sent, success",
941 GNUNET_STATISTICS_update (plugin->env->stats,
942 "# UDP, ACK msgs, bytes overhead, sent, success",
943 overhead, GNUNET_NO);
944 GNUNET_STATISTICS_update (plugin->env->stats,
945 "# UDP, total, bytes overhead, sent",
946 overhead, GNUNET_NO);
952 LOG (GNUNET_ERROR_TYPE_ERROR,
953 "ERROR: %u\n", udpw->msg_type);
959 switch (udpw->msg_type) {
960 case MSG_UNFRAGMENTED:
961 /* Unfragmented message: failed to send */
962 if (NULL != udpw->cont)
963 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
964 udpw->payload_size, overhead);
965 GNUNET_STATISTICS_update (plugin->env->stats,
966 "# UDP, unfragmented msgs, messages, sent, failure",
968 GNUNET_STATISTICS_update (plugin->env->stats,
969 "# UDP, unfragmented msgs, bytes payload, sent, failure",
970 udpw->payload_size, GNUNET_NO);
971 GNUNET_STATISTICS_update (plugin->env->stats,
972 "# UDP, unfragmented msgs, bytes overhead, sent, failure",
973 overhead, GNUNET_NO);
975 case MSG_FRAGMENTED_COMPLETE:
976 GNUNET_assert (NULL != udpw->frag_ctx);
977 if (udpw->frag_ctx->cont != NULL)
978 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_SYSERR,
979 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
980 GNUNET_STATISTICS_update (plugin->env->stats,
981 "# UDP, fragmented msgs, messages, sent, failure",
983 GNUNET_STATISTICS_update (plugin->env->stats,
984 "# UDP, fragmented msgs, bytes payload, sent, failure",
985 udpw->payload_size, GNUNET_NO);
986 GNUNET_STATISTICS_update (plugin->env->stats,
987 "# UDP, fragmented msgs, bytes payload, sent, failure",
988 overhead, GNUNET_NO);
989 GNUNET_STATISTICS_update (plugin->env->stats,
990 "# UDP, fragmented msgs, bytes payload, sent, failure",
991 overhead, GNUNET_NO);
992 GNUNET_STATISTICS_update (plugin->env->stats,
993 "# UDP, fragmented msgs, messages, pending",
997 GNUNET_assert (NULL != udpw->frag_ctx);
998 /* Fragmented message: failed to send */
999 GNUNET_STATISTICS_update (plugin->env->stats,
1000 "# UDP, fragmented msgs, fragments, sent, failure",
1002 GNUNET_STATISTICS_update (plugin->env->stats,
1003 "# UDP, fragmented msgs, fragments bytes, sent, failure",
1004 udpw->msg_size, GNUNET_NO);
1007 /* ACK message: failed to send */
1008 GNUNET_STATISTICS_update (plugin->env->stats,
1009 "# UDP, ACK msgs, messages, sent, failure",
1013 /* Beacon message: failed to send */
1029 * Check if the given port is plausible (must be either our listen
1030 * port or our advertised port). If it is neither, we return
1033 * @param plugin global variables
1034 * @param in_port port number to check
1035 * @return GNUNET_OK if port is either open_port or adv_port
1038 check_port (struct Plugin *plugin, uint16_t in_port)
1040 if ((in_port == plugin->port) || (in_port == plugin->aport))
1042 return GNUNET_SYSERR;
1047 * Function that will be called to check if a binary address for this
1048 * plugin is well-formed and corresponds to an address for THIS peer
1049 * (as per our configuration). Naturally, if absolutely necessary,
1050 * plugins can be a bit conservative in their answer, but in general
1051 * plugins should make sure that the address does not redirect
1052 * traffic to a 3rd party that might try to man-in-the-middle our
1055 * @param cls closure, should be our handle to the Plugin
1056 * @param addr pointer to the address
1057 * @param addrlen length of addr
1058 * @return GNUNET_OK if this is a plausible address for this peer
1059 * and transport, GNUNET_SYSERR if not
1063 udp_plugin_check_address (void *cls, const void *addr, size_t addrlen)
1065 struct Plugin *plugin = cls;
1066 struct IPv4UdpAddress *v4;
1067 struct IPv6UdpAddress *v6;
1069 if ((addrlen != sizeof (struct IPv4UdpAddress)) &&
1070 (addrlen != sizeof (struct IPv6UdpAddress)))
1072 return GNUNET_SYSERR;
1074 if (addrlen == sizeof (struct IPv4UdpAddress))
1076 v4 = (struct IPv4UdpAddress *) addr;
1077 if (GNUNET_OK != check_port (plugin, ntohs (v4->u4_port)))
1078 return GNUNET_SYSERR;
1080 GNUNET_NAT_test_address (plugin->nat, &v4->ipv4_addr,
1081 sizeof (struct in_addr)))
1082 return GNUNET_SYSERR;
1086 v6 = (struct IPv6UdpAddress *) addr;
1087 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1089 GNUNET_break_op (0);
1090 return GNUNET_SYSERR;
1092 if (GNUNET_OK != check_port (plugin, ntohs (v6->u6_port)))
1093 return GNUNET_SYSERR;
1095 GNUNET_NAT_test_address (plugin->nat, &v6->ipv6_addr,
1096 sizeof (struct in6_addr)))
1097 return GNUNET_SYSERR;
1104 * Task to free resources associated with a session.
1106 * @param s session to free
1109 free_session (struct Session *s)
1111 if (NULL != s->frag_ctx)
1113 GNUNET_FRAGMENT_context_destroy(s->frag_ctx->frag, NULL, NULL);
1114 GNUNET_free (s->frag_ctx);
1122 dequeue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1124 if (plugin->bytes_in_buffer < udpw->msg_size)
1128 GNUNET_STATISTICS_update (plugin->env->stats,
1129 "# UDP, total, bytes in buffers",
1130 - (long long) udpw->msg_size, GNUNET_NO);
1131 plugin->bytes_in_buffer -= udpw->msg_size;
1133 GNUNET_STATISTICS_update (plugin->env->stats,
1134 "# UDP, total, msgs in buffers",
1136 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1137 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_queue_head,
1138 plugin->ipv4_queue_tail, udpw);
1139 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1140 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_queue_head,
1141 plugin->ipv6_queue_tail, udpw);
1146 fragmented_message_done (struct UDP_FragmentationContext *fc, int result)
1148 struct UDP_MessageWrapper *udpw;
1149 struct UDP_MessageWrapper *tmp;
1150 struct UDP_MessageWrapper dummy;
1151 struct Session *s = fc->session;
1153 LOG (GNUNET_ERROR_TYPE_DEBUG,
1154 "%p : Fragmented message removed with result %s\n",
1156 (result == GNUNET_SYSERR) ? "FAIL" : "SUCCESS");
1158 /* Call continuation for fragmented message */
1159 memset (&dummy, 0, sizeof (dummy));
1160 dummy.msg_type = MSG_FRAGMENTED_COMPLETE;
1161 dummy.msg_size = s->frag_ctx->on_wire_size;
1162 dummy.payload_size = s->frag_ctx->payload_size;
1163 dummy.frag_ctx = s->frag_ctx;
1165 dummy.cont_cls = NULL;
1168 call_continuation (&dummy, result);
1170 /* Remove leftover fragments from queue */
1171 if (s->addrlen == sizeof (struct sockaddr_in6))
1173 udpw = plugin->ipv6_queue_head;
1174 while (NULL != udpw)
1177 if ((udpw->frag_ctx != NULL) && (udpw->frag_ctx == s->frag_ctx))
1179 dequeue (plugin, udpw);
1180 call_continuation (udpw, GNUNET_SYSERR);
1186 if (s->addrlen == sizeof (struct sockaddr_in))
1188 udpw = plugin->ipv4_queue_head;
1192 if ((NULL != udpw->frag_ctx) && (udpw->frag_ctx == s->frag_ctx))
1194 dequeue (plugin, udpw);
1195 call_continuation (udpw, GNUNET_SYSERR);
1202 /* Destroy fragmentation context */
1203 GNUNET_FRAGMENT_context_destroy (fc->frag,
1204 &s->last_expected_msg_delay,
1205 &s->last_expected_ack_delay);
1211 * Functions with this signature are called whenever we need
1212 * to close a session due to a disconnect or failure to
1213 * establish a connection.
1215 * @param s session to close down
1218 disconnect_session (struct Session *s)
1220 struct UDP_MessageWrapper *udpw;
1221 struct UDP_MessageWrapper *next;
1223 GNUNET_assert (GNUNET_YES != s->in_destroy);
1224 LOG (GNUNET_ERROR_TYPE_DEBUG,
1225 "Session %p to peer `%s' address ended \n",
1227 GNUNET_i2s (&s->target),
1228 GNUNET_a2s (s->sock_addr, s->addrlen));
1229 stop_session_timeout (s);
1231 if (NULL != s->frag_ctx)
1233 /* Remove fragmented message due to disconnect */
1234 fragmented_message_done (s->frag_ctx, GNUNET_SYSERR);
1237 next = plugin->ipv4_queue_head;
1238 while (NULL != (udpw = next))
1241 if (udpw->session == s)
1243 dequeue (plugin, udpw);
1244 call_continuation(udpw, GNUNET_SYSERR);
1248 next = plugin->ipv6_queue_head;
1249 while (NULL != (udpw = next))
1252 if (udpw->session == s)
1254 dequeue (plugin, udpw);
1255 call_continuation(udpw, GNUNET_SYSERR);
1259 plugin->env->session_end (plugin->env->cls, &s->target, s);
1261 if (NULL != s->frag_ctx)
1263 if (NULL != s->frag_ctx->cont)
1265 s->frag_ctx->cont (s->frag_ctx->cont_cls, &s->target, GNUNET_SYSERR,
1266 s->frag_ctx->payload_size, s->frag_ctx->on_wire_size);
1267 LOG (GNUNET_ERROR_TYPE_DEBUG,
1268 "Calling continuation for fragemented message to `%s' with result SYSERR\n",
1269 GNUNET_i2s (&s->target));
1273 GNUNET_assert (GNUNET_YES ==
1274 GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
1275 &s->target.hashPubKey,
1277 GNUNET_STATISTICS_set(plugin->env->stats,
1278 "# UDP, sessions active",
1279 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1282 s->in_destroy = GNUNET_YES;
1288 * Destroy a session, plugin is being unloaded.
1291 * @param key hash of public key of target peer
1292 * @param value a 'struct PeerSession*' to clean up
1293 * @return GNUNET_OK (continue to iterate)
1296 disconnect_and_free_it (void *cls, const struct GNUNET_HashCode * key, void *value)
1298 disconnect_session(value);
1304 * Disconnect from a remote node. Clean up session if we have one for this peer
1306 * @param cls closure for this call (should be handle to Plugin)
1307 * @param target the peeridentity of the peer to disconnect
1308 * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
1311 udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
1313 struct Plugin *plugin = cls;
1314 GNUNET_assert (plugin != NULL);
1316 GNUNET_assert (target != NULL);
1317 LOG (GNUNET_ERROR_TYPE_DEBUG,
1318 "Disconnecting from peer `%s'\n", GNUNET_i2s (target));
1319 /* Clean up sessions */
1320 GNUNET_CONTAINER_multihashmap_get_multiple (plugin->sessions, &target->hashPubKey, &disconnect_and_free_it, plugin);
1325 * Session was idle, so disconnect it
1328 session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1330 GNUNET_assert (NULL != cls);
1331 struct Session *s = cls;
1333 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1335 "Session %p was idle for %s, disconnecting\n",
1337 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1339 /* call session destroy function */
1340 disconnect_session (s);
1345 * Start session timeout
1348 start_session_timeout (struct Session *s)
1350 GNUNET_assert (NULL != s);
1351 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s->timeout_task);
1352 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1355 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1356 "Timeout for session %p set to %s\n",
1358 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1364 * Increment session timeout due to activity
1367 reschedule_session_timeout (struct Session *s)
1369 GNUNET_assert (NULL != s);
1370 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
1372 GNUNET_SCHEDULER_cancel (s->timeout_task);
1373 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1376 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1377 "Timeout rescheduled for session %p set to %s\n",
1379 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1384 static struct Session *
1385 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
1386 const void *addr, size_t addrlen,
1387 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1390 const struct IPv4UdpAddress *t4;
1391 const struct IPv6UdpAddress *t6;
1392 struct sockaddr_in *v4;
1393 struct sockaddr_in6 *v6;
1404 case sizeof (struct IPv4UdpAddress):
1405 if (NULL == plugin->sockv4)
1407 LOG (GNUNET_ERROR_TYPE_DEBUG,
1408 "Could not create session for peer `%s' address `%s': IPv4 is not enabled\n",
1410 udp_address_to_string(NULL, addr, addrlen));
1414 s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in));
1415 len = sizeof (struct sockaddr_in);
1416 v4 = (struct sockaddr_in *) &s[1];
1417 v4->sin_family = AF_INET;
1418 #if HAVE_SOCKADDR_IN_SIN_LEN
1419 v4->sin_len = sizeof (struct sockaddr_in);
1421 v4->sin_port = t4->u4_port;
1422 v4->sin_addr.s_addr = t4->ipv4_addr;
1423 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v4, sizeof (struct sockaddr_in));
1425 case sizeof (struct IPv6UdpAddress):
1426 if (NULL == plugin->sockv6)
1428 LOG (GNUNET_ERROR_TYPE_INFO,
1429 "Could not create session for peer `%s' address `%s': IPv6 is not enabled\n",
1431 udp_address_to_string(NULL, addr, addrlen));
1435 s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in6));
1436 len = sizeof (struct sockaddr_in6);
1437 v6 = (struct sockaddr_in6 *) &s[1];
1438 v6->sin6_family = AF_INET6;
1439 #if HAVE_SOCKADDR_IN_SIN_LEN
1440 v6->sin6_len = sizeof (struct sockaddr_in6);
1442 v6->sin6_port = t6->u6_port;
1443 v6->sin6_addr = t6->ipv6_addr;
1444 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v6, sizeof (struct sockaddr_in6));
1447 /* Must have a valid address to send to */
1448 GNUNET_STATISTICS_update (plugin->env->stats,
1450 ("# requests to create session with invalid address"),
1455 s->target = *target;
1456 s->sock_addr = (const struct sockaddr *) &s[1];
1457 s->last_expected_ack_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 250);
1458 s->last_expected_msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
1459 s->flow_delay_from_other_peer = GNUNET_TIME_UNIT_ZERO_ABS;
1460 s->flow_delay_for_other_peer = GNUNET_TIME_UNIT_ZERO;
1461 s->inbound = GNUNET_NO;
1462 start_session_timeout (s);
1468 session_cmp_it (void *cls,
1469 const struct GNUNET_HashCode * key,
1472 struct SessionCompareContext * cctx = cls;
1473 const struct GNUNET_HELLO_Address *address = cctx->addr;
1474 struct Session *s = value;
1476 socklen_t s_addrlen = s->addrlen;
1478 LOG (GNUNET_ERROR_TYPE_DEBUG,
1479 "Comparing address %s <-> %s\n",
1480 udp_address_to_string (NULL, (void *) address->address,
1481 address->address_length),
1482 GNUNET_a2s (s->sock_addr, s->addrlen));
1483 if (s->inbound != cctx->inbound)
1485 if ((address->address_length == sizeof (struct IPv4UdpAddress)) &&
1486 (s_addrlen == sizeof (struct sockaddr_in)))
1488 struct IPv4UdpAddress * u4 = NULL;
1489 u4 = (struct IPv4UdpAddress *) address->address;
1490 GNUNET_assert (NULL != u4);
1491 const struct sockaddr_in *s4 = (const struct sockaddr_in *) s->sock_addr;
1492 if ((0 == memcmp ((const void *) &u4->ipv4_addr,(const void *) &s4->sin_addr, sizeof (struct in_addr))) &&
1493 (u4->u4_port == s4->sin_port))
1500 if ((address->address_length == sizeof (struct IPv6UdpAddress)) &&
1501 (s_addrlen == sizeof (struct sockaddr_in6)))
1503 struct IPv6UdpAddress * u6 = NULL;
1504 u6 = (struct IPv6UdpAddress *) address->address;
1505 GNUNET_assert (NULL != u6);
1506 const struct sockaddr_in6 *s6 = (const struct sockaddr_in6 *) s->sock_addr;
1507 if ((0 == memcmp (&u6->ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr))) &&
1508 (u6->u6_port == s6->sin6_port))
1519 * Function obtain the network type for a session
1521 * @param cls closure ('struct Plugin*')
1522 * @param session the session
1523 * @return the network type in HBO or GNUNET_SYSERR
1525 static enum GNUNET_ATS_Network_Type
1526 udp_get_network (void *cls,
1527 struct Session *session)
1529 return ntohl (session->ats.value);
1534 * Creates a new outbound session the transport service will use to send data to the
1537 * @param cls the plugin
1538 * @param address the address
1539 * @param inbound look for inbound session
1540 * @return the session or NULL of max connections exceeded
1542 static struct Session *
1543 udp_plugin_lookup_session (void *cls,
1544 const struct GNUNET_HELLO_Address *address,
1547 struct Plugin * plugin = cls;
1548 struct IPv6UdpAddress * udp_a6;
1549 struct IPv4UdpAddress * udp_a4;
1551 GNUNET_assert (plugin != NULL);
1552 GNUNET_assert (address != NULL);
1555 if ((address->address == NULL) ||
1556 ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1557 (address->address_length != sizeof (struct IPv6UdpAddress))))
1559 LOG (GNUNET_ERROR_TYPE_WARNING,
1560 _("Trying to create session for address of unexpected length %u (should be %u or %u)\n"),
1561 address->address_length,
1562 sizeof (struct IPv4UdpAddress),
1563 sizeof (struct IPv6UdpAddress));
1567 if (address->address_length == sizeof (struct IPv4UdpAddress))
1569 if (plugin->sockv4 == NULL)
1571 udp_a4 = (struct IPv4UdpAddress *) address->address;
1572 if (udp_a4->u4_port == 0)
1576 if (address->address_length == sizeof (struct IPv6UdpAddress))
1578 if (plugin->sockv6 == NULL)
1580 udp_a6 = (struct IPv6UdpAddress *) address->address;
1581 if (udp_a6->u6_port == 0)
1585 /* check if session already exists */
1586 struct SessionCompareContext cctx;
1587 cctx.addr = address;
1589 cctx.inbound = inbound;
1590 LOG (GNUNET_ERROR_TYPE_DEBUG,
1591 "Looking for existing session for peer `%s' `%s' \n",
1592 GNUNET_i2s (&address->peer),
1593 udp_address_to_string(NULL, address->address, address->address_length));
1594 GNUNET_CONTAINER_multihashmap_get_multiple(plugin->sessions, &address->peer.hashPubKey, session_cmp_it, &cctx);
1595 if (cctx.res != NULL)
1597 LOG (GNUNET_ERROR_TYPE_DEBUG, "Found existing session %p\n", cctx.res);
1604 static struct Session *
1605 udp_plugin_create_session (void *cls,
1606 const struct GNUNET_HELLO_Address *address,
1611 s = create_session (plugin,
1614 address->address_length,
1617 return NULL; /* protocol not supported or address invalid */
1618 s->inbound = inbound;
1619 LOG (GNUNET_ERROR_TYPE_DEBUG,
1620 "Creating new %s session %p for peer `%s' address `%s'\n",
1621 (GNUNET_YES == s->inbound) ? "inbound" : "outbound",
1623 GNUNET_i2s(&address->peer),
1624 udp_address_to_string(NULL,address->address,address->address_length));
1625 GNUNET_assert (GNUNET_OK ==
1626 GNUNET_CONTAINER_multihashmap_put (plugin->sessions,
1627 &s->target.hashPubKey,
1629 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1630 GNUNET_STATISTICS_set(plugin->env->stats,
1631 "# UDP, sessions active",
1632 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1639 * Creates a new outbound session the transport service will use to send data to the
1642 * @param cls the plugin
1643 * @param address the address
1644 * @return the session or NULL of max connections exceeded
1646 static struct Session *
1647 udp_plugin_get_session (void *cls,
1648 const struct GNUNET_HELLO_Address *address)
1652 if (NULL == address)
1657 if ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1658 (address->address_length != sizeof (struct IPv6UdpAddress)))
1661 /* otherwise create new */
1662 if (NULL != (s = udp_plugin_lookup_session (cls, address, GNUNET_NO)))
1664 return udp_plugin_create_session (cls, address, GNUNET_NO);
1669 enqueue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1671 if (plugin->bytes_in_buffer + udpw->msg_size > INT64_MAX)
1675 GNUNET_STATISTICS_update (plugin->env->stats,
1676 "# UDP, total, bytes in buffers",
1677 udpw->msg_size, GNUNET_NO);
1678 plugin->bytes_in_buffer += udpw->msg_size;
1680 GNUNET_STATISTICS_update (plugin->env->stats,
1681 "# UDP, total, msgs in buffers",
1683 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1684 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_queue_head,
1685 plugin->ipv4_queue_tail, udpw);
1686 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1687 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_queue_head,
1688 plugin->ipv6_queue_tail, udpw);
1694 * Fragment message was transmitted via UDP, let fragmentation know
1695 * to send the next fragment now.
1697 * @param cls the 'struct UDPMessageWrapper' of the fragment
1698 * @param target destination peer (ignored)
1699 * @param result GNUNET_OK on success (ignored)
1700 * @param payload bytes payload sent
1701 * @param physical bytes physical sent
1704 send_next_fragment (void *cls,
1705 const struct GNUNET_PeerIdentity *target,
1706 int result, size_t payload, size_t physical)
1708 struct UDP_MessageWrapper *udpw = cls;
1710 GNUNET_FRAGMENT_context_transmission_done (udpw->frag_ctx->frag);
1715 * Function that is called with messages created by the fragmentation
1716 * module. In the case of the 'proc' callback of the
1717 * GNUNET_FRAGMENT_context_create function, this function must
1718 * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
1720 * @param cls closure, the 'struct FragmentationContext'
1721 * @param msg the message that was created
1724 enqueue_fragment (void *cls, const struct GNUNET_MessageHeader *msg)
1726 struct UDP_FragmentationContext *frag_ctx = cls;
1727 struct Plugin *plugin = frag_ctx->plugin;
1728 struct UDP_MessageWrapper * udpw;
1729 size_t msg_len = ntohs (msg->size);
1731 LOG (GNUNET_ERROR_TYPE_DEBUG,
1732 "Enqueuing fragment with %u bytes\n", msg_len);
1733 frag_ctx->fragments_used ++;
1734 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msg_len);
1735 udpw->session = frag_ctx->session;
1736 udpw->msg_buf = (char *) &udpw[1];
1737 udpw->msg_size = msg_len;
1738 udpw->payload_size = msg_len; /*FIXME: minus fragment overhead */
1739 udpw->cont = &send_next_fragment;
1740 udpw->cont_cls = udpw;
1741 udpw->timeout = frag_ctx->timeout;
1742 udpw->frag_ctx = frag_ctx;
1743 udpw->msg_type = MSG_FRAGMENTED;
1744 memcpy (udpw->msg_buf, msg, msg_len);
1745 enqueue (plugin, udpw);
1746 schedule_select (plugin);
1751 * Function that can be used by the transport service to transmit
1752 * a message using the plugin. Note that in the case of a
1753 * peer disconnecting, the continuation MUST be called
1754 * prior to the disconnect notification itself. This function
1755 * will be called with this peer's HELLO message to initiate
1756 * a fresh connection to another peer.
1758 * @param cls closure
1759 * @param s which session must be used
1760 * @param msgbuf the message to transmit
1761 * @param msgbuf_size number of bytes in 'msgbuf'
1762 * @param priority how important is the message (most plugins will
1763 * ignore message priority and just FIFO)
1764 * @param to how long to wait at most for the transmission (does not
1765 * require plugins to discard the message after the timeout,
1766 * just advisory for the desired delay; most plugins will ignore
1768 * @param cont continuation to call once the message has
1769 * been transmitted (or if the transport is ready
1770 * for the next transmission call; or if the
1771 * peer disconnected...); can be NULL
1772 * @param cont_cls closure for cont
1773 * @return number of bytes used (on the physical network, with overheads);
1774 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1775 * and does NOT mean that the message was not transmitted (DV)
1778 udp_plugin_send (void *cls,
1780 const char *msgbuf, size_t msgbuf_size,
1781 unsigned int priority,
1782 struct GNUNET_TIME_Relative to,
1783 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1785 struct Plugin *plugin = cls;
1786 size_t udpmlen = msgbuf_size + sizeof (struct UDPMessage);
1787 struct UDP_FragmentationContext * frag_ctx;
1788 struct UDP_MessageWrapper * udpw;
1789 struct UDPMessage *udp;
1791 GNUNET_assert (plugin != NULL);
1792 GNUNET_assert (s != NULL);
1794 if ((s->addrlen == sizeof (struct sockaddr_in6)) && (plugin->sockv6 == NULL))
1795 return GNUNET_SYSERR;
1796 if ((s->addrlen == sizeof (struct sockaddr_in)) && (plugin->sockv4 == NULL))
1797 return GNUNET_SYSERR;
1798 if (udpmlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1801 return GNUNET_SYSERR;
1803 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains_value(plugin->sessions, &s->target.hashPubKey, s))
1806 return GNUNET_SYSERR;
1808 LOG (GNUNET_ERROR_TYPE_DEBUG,
1809 "UDP transmits %u-byte message to `%s' using address `%s'\n",
1811 GNUNET_i2s (&s->target),
1812 GNUNET_a2s(s->sock_addr, s->addrlen));
1816 udp = (struct UDPMessage *) mbuf;
1817 udp->header.size = htons (udpmlen);
1818 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
1819 udp->reserved = htonl (0);
1820 udp->sender = *plugin->env->my_identity;
1822 reschedule_session_timeout(s);
1823 if (udpmlen <= UDP_MTU)
1825 /* unfragmented message */
1826 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + udpmlen);
1828 udpw->msg_buf = (char *) &udpw[1];
1829 udpw->msg_size = udpmlen; /* message size with UDP overhead */
1830 udpw->payload_size = msgbuf_size; /* message size without UDP overhead */
1831 udpw->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1833 udpw->cont_cls = cont_cls;
1834 udpw->frag_ctx = NULL;
1835 udpw->msg_type = MSG_UNFRAGMENTED;
1836 memcpy (udpw->msg_buf, udp, sizeof (struct UDPMessage));
1837 memcpy (&udpw->msg_buf[sizeof (struct UDPMessage)], msgbuf, msgbuf_size);
1838 enqueue (plugin, udpw);
1840 GNUNET_STATISTICS_update (plugin->env->stats,
1841 "# UDP, unfragmented msgs, messages, attempt",
1843 GNUNET_STATISTICS_update (plugin->env->stats,
1844 "# UDP, unfragmented msgs, bytes payload, attempt",
1845 udpw->payload_size, GNUNET_NO);
1849 /* fragmented message */
1850 if (s->frag_ctx != NULL)
1851 return GNUNET_SYSERR;
1852 memcpy (&udp[1], msgbuf, msgbuf_size);
1853 frag_ctx = GNUNET_malloc (sizeof (struct UDP_FragmentationContext));
1854 frag_ctx->plugin = plugin;
1855 frag_ctx->session = s;
1856 frag_ctx->cont = cont;
1857 frag_ctx->cont_cls = cont_cls;
1858 frag_ctx->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1859 frag_ctx->payload_size = msgbuf_size; /* unfragmented message size without UDP overhead */
1860 frag_ctx->on_wire_size = 0; /* bytes with UDP and fragmentation overhead */
1861 frag_ctx->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
1864 s->last_expected_msg_delay,
1865 s->last_expected_ack_delay,
1869 s->frag_ctx = frag_ctx;
1870 GNUNET_STATISTICS_update (plugin->env->stats,
1871 "# UDP, fragmented msgs, messages, pending",
1873 GNUNET_STATISTICS_update (plugin->env->stats,
1874 "# UDP, fragmented msgs, messages, attempt",
1876 GNUNET_STATISTICS_update (plugin->env->stats,
1877 "# UDP, fragmented msgs, bytes payload, attempt",
1878 frag_ctx->payload_size, GNUNET_NO);
1880 schedule_select (plugin);
1886 * Our external IP address/port mapping has changed.
1888 * @param cls closure, the 'struct LocalAddrList'
1889 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1890 * the previous (now invalid) one
1891 * @param addr either the previous or the new public IP address
1892 * @param addrlen actual lenght of the address
1895 udp_nat_port_map_callback (void *cls, int add_remove,
1896 const struct sockaddr *addr, socklen_t addrlen)
1898 struct Plugin *plugin = cls;
1899 struct IPv4UdpAddress u4;
1900 struct IPv6UdpAddress u6;
1904 LOG (GNUNET_ERROR_TYPE_INFO,
1905 "NAT notification to %s address `%s'\n",
1906 (GNUNET_YES == add_remove) ? "add" : "remove",
1907 GNUNET_a2s (addr, addrlen));
1909 /* convert 'addr' to our internal format */
1910 switch (addr->sa_family)
1913 GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
1914 memset (&u4, 0, sizeof (u4));
1915 u4.options = htonl(myoptions);
1916 u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1917 u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
1918 if (0 == ((struct sockaddr_in *) addr)->sin_port)
1921 args = sizeof (struct IPv4UdpAddress);
1924 GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
1925 memset (&u4, 0, sizeof (u4));
1926 u6.options = htonl(myoptions);
1927 if (0 == ((struct sockaddr_in6 *) addr)->sin6_port)
1929 memcpy (&u6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
1930 sizeof (struct in6_addr));
1931 u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
1933 args = sizeof (struct IPv6UdpAddress);
1939 /* modify our published address list */
1940 plugin->env->notify_address (plugin->env->cls, add_remove, arg, args, "udp");
1946 * Message tokenizer has broken up an incomming message. Pass it on
1949 * @param cls the 'struct Plugin'
1950 * @param client the 'struct SourceInformation'
1951 * @param hdr the actual message
1954 process_inbound_tokenized_messages (void *cls, void *client,
1955 const struct GNUNET_MessageHeader *hdr)
1957 struct Plugin *plugin = cls;
1958 struct SourceInformation *si = client;
1959 struct GNUNET_TIME_Relative delay;
1961 GNUNET_assert (si->session != NULL);
1962 if (GNUNET_YES == si->session->in_destroy)
1965 GNUNET_break (ntohl(si->session->ats.value) != GNUNET_ATS_NET_UNSPECIFIED);
1966 delay = plugin->env->receive (plugin->env->cls,
1970 (GNUNET_YES == si->session->inbound) ? NULL : si->arg,
1971 (GNUNET_YES == si->session->inbound) ? 0 : si->args);
1973 plugin->env->update_address_metrics (plugin->env->cls,
1975 (GNUNET_YES == si->session->inbound) ? NULL : si->arg,
1976 (GNUNET_YES == si->session->inbound) ? 0 : si->args,
1978 &si->session->ats, 1);
1980 si->session->flow_delay_for_other_peer = delay;
1981 reschedule_session_timeout(si->session);
1987 * We've received a UDP Message. Process it (pass contents to main service).
1989 * @param plugin plugin context
1990 * @param msg the message
1991 * @param sender_addr sender address
1992 * @param sender_addr_len number of bytes in sender_addr
1995 process_udp_message (struct Plugin *plugin, const struct UDPMessage *msg,
1996 const struct sockaddr *sender_addr,
1997 socklen_t sender_addr_len)
1999 struct SourceInformation si;
2001 struct IPv4UdpAddress u4;
2002 struct IPv6UdpAddress u6;
2006 if (0 != ntohl (msg->reserved))
2008 GNUNET_break_op (0);
2011 if (ntohs (msg->header.size) <
2012 sizeof (struct GNUNET_MessageHeader) + sizeof (struct UDPMessage))
2014 GNUNET_break_op (0);
2018 /* convert address */
2019 switch (sender_addr->sa_family)
2022 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in));
2023 memset (&u4, 0, sizeof (u4));
2024 u6.options = htonl (0);
2025 u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
2026 u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
2031 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in6));
2032 memset (&u6, 0, sizeof (u6));
2033 u6.options = htonl (0);
2034 u6.ipv6_addr = ((struct sockaddr_in6 *) sender_addr)->sin6_addr;
2035 u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
2043 LOG (GNUNET_ERROR_TYPE_DEBUG,
2044 "Received message with %u bytes from peer `%s' at `%s'\n",
2045 (unsigned int) ntohs (msg->header.size), GNUNET_i2s (&msg->sender),
2046 GNUNET_a2s (sender_addr, sender_addr_len));
2048 struct GNUNET_HELLO_Address * address = GNUNET_HELLO_address_allocate(&msg->sender, "udp", arg, args);
2049 if (NULL == (s = udp_plugin_lookup_session (plugin, address, GNUNET_YES)))
2051 s = udp_plugin_create_session (plugin, address, GNUNET_YES);
2052 plugin->env->session_start (NULL, &address->peer, PLUGIN_NAME,
2053 (GNUNET_YES == s->inbound) ? NULL : address->address,
2054 (GNUNET_YES == s->inbound) ? 0 : address->address_length,
2057 GNUNET_free (address);
2059 /* iterate over all embedded messages */
2061 si.sender = msg->sender;
2065 GNUNET_SERVER_mst_receive (plugin->mst, &si, (const char *) &msg[1],
2066 ntohs (msg->header.size) -
2067 sizeof (struct UDPMessage), GNUNET_YES, GNUNET_NO);
2069 if ( (0 == s->rc) && (GNUNET_YES == s->in_destroy))
2075 * Scan the heap for a receive context with the given address.
2077 * @param cls the 'struct FindReceiveContext'
2078 * @param node internal node of the heap
2079 * @param element value stored at the node (a 'struct ReceiveContext')
2080 * @param cost cost associated with the node
2081 * @return GNUNET_YES if we should continue to iterate,
2085 find_receive_context (void *cls, struct GNUNET_CONTAINER_HeapNode *node,
2086 void *element, GNUNET_CONTAINER_HeapCostType cost)
2088 struct FindReceiveContext *frc = cls;
2089 struct DefragContext *e = element;
2091 if ((frc->addr_len == e->addr_len) &&
2092 (0 == memcmp (frc->addr, e->src_addr, frc->addr_len)))
2102 * Process a defragmented message.
2104 * @param cls the 'struct ReceiveContext'
2105 * @param msg the message
2108 fragment_msg_proc (void *cls, const struct GNUNET_MessageHeader *msg)
2110 struct DefragContext *rc = cls;
2112 if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
2117 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2122 process_udp_message (rc->plugin, (const struct UDPMessage *) msg,
2123 rc->src_addr, rc->addr_len);
2127 struct LookupContext
2129 const struct sockaddr * addr;
2131 struct Session *res;
2138 lookup_session_by_addr_it (void *cls, const struct GNUNET_HashCode * key, void *value)
2140 struct LookupContext *l_ctx = cls;
2141 struct Session * s = value;
2143 if ((s->addrlen == l_ctx->addrlen) &&
2144 (0 == memcmp (s->sock_addr, l_ctx->addr, s->addrlen)))
2154 * Transmit an acknowledgement.
2156 * @param cls the 'struct ReceiveContext'
2157 * @param id message ID (unused)
2158 * @param msg ack to transmit
2161 ack_proc (void *cls, uint32_t id, const struct GNUNET_MessageHeader *msg)
2163 struct DefragContext *rc = cls;
2164 size_t msize = sizeof (struct UDP_ACK_Message) + ntohs (msg->size);
2165 struct UDP_ACK_Message *udp_ack;
2167 struct UDP_MessageWrapper *udpw;
2169 struct LookupContext l_ctx;
2171 l_ctx.addr = rc->src_addr;
2172 l_ctx.addrlen = rc->addr_len;
2174 GNUNET_CONTAINER_multihashmap_iterate (rc->plugin->sessions,
2175 &lookup_session_by_addr_it,
2182 if (s->flow_delay_for_other_peer.rel_value_us <= UINT32_MAX)
2183 delay = s->flow_delay_for_other_peer.rel_value_us;
2185 LOG (GNUNET_ERROR_TYPE_DEBUG,
2186 "Sending ACK to `%s' including delay of %s\n",
2187 GNUNET_a2s (rc->src_addr,
2188 (rc->src_addr->sa_family ==
2189 AF_INET) ? sizeof (struct sockaddr_in) : sizeof (struct
2191 GNUNET_STRINGS_relative_time_to_string (s->flow_delay_for_other_peer,
2193 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msize);
2194 udpw->msg_size = msize;
2195 udpw->payload_size = 0;
2197 udpw->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
2198 udpw->msg_buf = (char *)&udpw[1];
2199 udpw->msg_type = MSG_ACK;
2200 udp_ack = (struct UDP_ACK_Message *) udpw->msg_buf;
2201 udp_ack->header.size = htons ((uint16_t) msize);
2202 udp_ack->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
2203 udp_ack->delay = htonl (delay);
2204 udp_ack->sender = *rc->plugin->env->my_identity;
2205 memcpy (&udp_ack[1], msg, ntohs (msg->size));
2206 enqueue (rc->plugin, udpw);
2211 read_process_msg (struct Plugin *plugin,
2212 const struct GNUNET_MessageHeader *msg,
2216 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2218 GNUNET_break_op (0);
2221 process_udp_message (plugin, (const struct UDPMessage *) msg,
2222 (const struct sockaddr *) addr, fromlen);
2227 read_process_ack (struct Plugin *plugin,
2228 const struct GNUNET_MessageHeader *msg,
2232 const struct GNUNET_MessageHeader *ack;
2233 const struct UDP_ACK_Message *udp_ack;
2234 struct LookupContext l_ctx;
2236 struct GNUNET_TIME_Relative flow_delay;
2238 if (ntohs (msg->size) <
2239 sizeof (struct UDP_ACK_Message) + sizeof (struct GNUNET_MessageHeader))
2241 GNUNET_break_op (0);
2244 udp_ack = (const struct UDP_ACK_Message *) msg;
2245 l_ctx.addr = (const struct sockaddr *) addr;
2246 l_ctx.addrlen = fromlen;
2248 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions,
2249 &lookup_session_by_addr_it,
2253 if ((NULL == s) || (NULL == s->frag_ctx))
2258 flow_delay.rel_value_us = (uint64_t) ntohl (udp_ack->delay);
2259 LOG (GNUNET_ERROR_TYPE_DEBUG,
2260 "We received a sending delay of %s\n",
2261 GNUNET_STRINGS_relative_time_to_string (flow_delay,
2263 s->flow_delay_from_other_peer =
2264 GNUNET_TIME_relative_to_absolute (flow_delay);
2266 ack = (const struct GNUNET_MessageHeader *) &udp_ack[1];
2267 if (ntohs (ack->size) !=
2268 ntohs (msg->size) - sizeof (struct UDP_ACK_Message))
2270 GNUNET_break_op (0);
2274 if (0 != memcmp (&l_ctx.res->target, &udp_ack->sender, sizeof (struct GNUNET_PeerIdentity)))
2276 if (GNUNET_OK != GNUNET_FRAGMENT_process_ack (s->frag_ctx->frag, ack))
2278 LOG (GNUNET_ERROR_TYPE_DEBUG,
2279 "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
2280 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2281 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2282 /* Expect more ACKs to arrive */
2286 LOG (GNUNET_ERROR_TYPE_DEBUG,
2287 "Message full ACK'ed\n",
2288 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2289 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2291 /* Remove fragmented message after successful sending */
2292 fragmented_message_done (s->frag_ctx, GNUNET_OK);
2297 read_process_fragment (struct Plugin *plugin,
2298 const struct GNUNET_MessageHeader *msg,
2302 struct DefragContext *d_ctx;
2303 struct GNUNET_TIME_Absolute now;
2304 struct FindReceiveContext frc;
2307 frc.addr = (const struct sockaddr *) addr;
2308 frc.addr_len = fromlen;
2310 LOG (GNUNET_ERROR_TYPE_DEBUG, "UDP processes %u-byte fragment from `%s'\n",
2311 (unsigned int) ntohs (msg->size),
2312 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2313 /* Lookup existing receive context for this address */
2314 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
2315 &find_receive_context,
2317 now = GNUNET_TIME_absolute_get ();
2322 /* Create a new defragmentation context */
2323 d_ctx = GNUNET_malloc (sizeof (struct DefragContext) + fromlen);
2324 memcpy (&d_ctx[1], addr, fromlen);
2325 d_ctx->src_addr = (const struct sockaddr *) &d_ctx[1];
2326 d_ctx->addr_len = fromlen;
2327 d_ctx->plugin = plugin;
2329 GNUNET_DEFRAGMENT_context_create (plugin->env->stats, UDP_MTU,
2330 UDP_MAX_MESSAGES_IN_DEFRAG, d_ctx,
2331 &fragment_msg_proc, &ack_proc);
2333 GNUNET_CONTAINER_heap_insert (plugin->defrag_ctxs, d_ctx,
2334 (GNUNET_CONTAINER_HeapCostType)
2336 LOG (GNUNET_ERROR_TYPE_DEBUG,
2337 "Created new defragmentation context for %u-byte fragment from `%s'\n",
2338 (unsigned int) ntohs (msg->size),
2339 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2343 LOG (GNUNET_ERROR_TYPE_DEBUG,
2344 "Found existing defragmentation context for %u-byte fragment from `%s'\n",
2345 (unsigned int) ntohs (msg->size),
2346 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2349 if (GNUNET_OK == GNUNET_DEFRAGMENT_process_fragment (d_ctx->defrag, msg))
2351 /* keep this 'rc' from expiring */
2352 GNUNET_CONTAINER_heap_update_cost (plugin->defrag_ctxs, d_ctx->hnode,
2353 (GNUNET_CONTAINER_HeapCostType)
2356 if (GNUNET_CONTAINER_heap_get_size (plugin->defrag_ctxs) >
2357 UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
2359 /* remove 'rc' that was inactive the longest */
2360 d_ctx = GNUNET_CONTAINER_heap_remove_root (plugin->defrag_ctxs);
2361 GNUNET_assert (NULL != d_ctx);
2362 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
2363 GNUNET_free (d_ctx);
2369 * Read and process a message from the given socket.
2371 * @param plugin the overall plugin
2372 * @param rsock socket to read from
2375 udp_select_read (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *rsock)
2379 char buf[65536] GNUNET_ALIGN;
2381 const struct GNUNET_MessageHeader *msg;
2383 fromlen = sizeof (addr);
2384 memset (&addr, 0, sizeof (addr));
2385 size = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof (buf),
2386 (struct sockaddr *) &addr, &fromlen);
2388 /* On SOCK_DGRAM UDP sockets recvfrom might fail with a
2389 * WSAECONNRESET error to indicate that previous sendto() (yes, sendto!)
2390 * on this socket has failed.
2392 * WSAECONNRESET - The virtual circuit was reset by the remote side
2393 * executing a hard or abortive close. The application should close
2394 * the socket; it is no longer usable. On a UDP-datagram socket this
2395 * error indicates a previous send operation resulted in an ICMP Port
2396 * Unreachable message.
2398 if ( (-1 == size) && (ECONNRESET == errno) )
2403 LOG (GNUNET_ERROR_TYPE_DEBUG,
2404 "UDP failed to receive data: %s\n", STRERROR (errno));
2405 /* Connection failure or something. Not a protocol violation. */
2408 if (size < sizeof (struct GNUNET_MessageHeader))
2410 LOG (GNUNET_ERROR_TYPE_WARNING,
2411 "UDP got %u bytes, which is not enough for a GNUnet message header\n",
2412 (unsigned int) size);
2413 /* _MAY_ be a connection failure (got partial message) */
2414 /* But it _MAY_ also be that the other side uses non-GNUnet protocol. */
2415 GNUNET_break_op (0);
2418 msg = (const struct GNUNET_MessageHeader *) buf;
2420 LOG (GNUNET_ERROR_TYPE_DEBUG,
2421 "UDP received %u-byte message from `%s' type %i\n", (unsigned int) size,
2422 GNUNET_a2s ((const struct sockaddr *) addr, fromlen), ntohs (msg->type));
2424 if (size != ntohs (msg->size))
2426 GNUNET_break_op (0);
2430 GNUNET_STATISTICS_update (plugin->env->stats,
2431 "# UDP, total, bytes, received",
2434 switch (ntohs (msg->type))
2436 case GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON:
2437 udp_broadcast_receive (plugin, &buf, size, addr, fromlen);
2440 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
2441 read_process_msg (plugin, msg, addr, fromlen);
2444 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
2445 read_process_ack (plugin, msg, addr, fromlen);
2448 case GNUNET_MESSAGE_TYPE_FRAGMENT:
2449 read_process_fragment (plugin, msg, addr, fromlen);
2453 GNUNET_break_op (0);
2459 static struct UDP_MessageWrapper *
2460 remove_timeout_messages_and_select (struct UDP_MessageWrapper *head,
2461 struct GNUNET_NETWORK_Handle *sock)
2463 struct UDP_MessageWrapper *udpw = NULL;
2464 struct GNUNET_TIME_Relative remaining;
2467 while (udpw != NULL)
2469 /* Find messages with timeout */
2470 remaining = GNUNET_TIME_absolute_get_remaining (udpw->timeout);
2471 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2473 /* Message timed out */
2474 switch (udpw->msg_type) {
2475 case MSG_UNFRAGMENTED:
2476 GNUNET_STATISTICS_update (plugin->env->stats,
2477 "# UDP, total, bytes, sent, timeout",
2478 udpw->msg_size, GNUNET_NO);
2479 GNUNET_STATISTICS_update (plugin->env->stats,
2480 "# UDP, total, messages, sent, timeout",
2482 GNUNET_STATISTICS_update (plugin->env->stats,
2483 "# UDP, unfragmented msgs, messages, sent, timeout",
2485 GNUNET_STATISTICS_update (plugin->env->stats,
2486 "# UDP, unfragmented msgs, bytes, sent, timeout",
2487 udpw->payload_size, GNUNET_NO);
2488 /* Not fragmented message */
2489 LOG (GNUNET_ERROR_TYPE_DEBUG,
2490 "Message for peer `%s' with size %u timed out\n",
2491 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2492 call_continuation (udpw, GNUNET_SYSERR);
2493 /* Remove message */
2494 dequeue (plugin, udpw);
2497 case MSG_FRAGMENTED:
2498 /* Fragmented message */
2499 GNUNET_STATISTICS_update (plugin->env->stats,
2500 "# UDP, total, bytes, sent, timeout",
2501 udpw->frag_ctx->on_wire_size, GNUNET_NO);
2502 GNUNET_STATISTICS_update (plugin->env->stats,
2503 "# UDP, total, messages, sent, timeout",
2505 call_continuation (udpw, GNUNET_SYSERR);
2506 LOG (GNUNET_ERROR_TYPE_DEBUG,
2507 "Fragment for message for peer `%s' with size %u timed out\n",
2508 GNUNET_i2s(&udpw->session->target), udpw->frag_ctx->payload_size);
2511 GNUNET_STATISTICS_update (plugin->env->stats,
2512 "# UDP, fragmented msgs, messages, sent, timeout",
2514 GNUNET_STATISTICS_update (plugin->env->stats,
2515 "# UDP, fragmented msgs, bytes, sent, timeout",
2516 udpw->frag_ctx->payload_size, GNUNET_NO);
2517 /* Remove fragmented message due to timeout */
2518 fragmented_message_done (udpw->frag_ctx, GNUNET_SYSERR);
2521 GNUNET_STATISTICS_update (plugin->env->stats,
2522 "# UDP, total, bytes, sent, timeout",
2523 udpw->msg_size, GNUNET_NO);
2524 GNUNET_STATISTICS_update (plugin->env->stats,
2525 "# UDP, total, messages, sent, timeout",
2527 LOG (GNUNET_ERROR_TYPE_DEBUG,
2528 "ACK Message for peer `%s' with size %u timed out\n",
2529 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2530 call_continuation (udpw, GNUNET_SYSERR);
2531 dequeue (plugin, udpw);
2537 if (sock == plugin->sockv4)
2538 udpw = plugin->ipv4_queue_head;
2539 else if (sock == plugin->sockv6)
2540 udpw = plugin->ipv6_queue_head;
2543 GNUNET_break (0); /* should never happen */
2546 GNUNET_STATISTICS_update (plugin->env->stats,
2547 "# messages dismissed due to timeout",
2552 /* Message did not time out, check flow delay */
2553 remaining = GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer);
2554 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2556 /* this message is not delayed */
2557 LOG (GNUNET_ERROR_TYPE_DEBUG,
2558 "Message for peer `%s' (%u bytes) is not delayed \n",
2559 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2560 break; /* Found message to send, break */
2564 /* Message is delayed, try next */
2565 LOG (GNUNET_ERROR_TYPE_DEBUG,
2566 "Message for peer `%s' (%u bytes) is delayed for %s\n",
2567 GNUNET_i2s(&udpw->session->target), udpw->payload_size,
2568 GNUNET_STRINGS_relative_time_to_string (remaining,
2579 analyze_send_error (struct Plugin *plugin,
2580 const struct sockaddr * sa,
2584 static int network_down_error;
2585 struct GNUNET_ATS_Information type;
2587 type = plugin->env->get_address_type (plugin->env->cls,sa, slen);
2588 if (((GNUNET_ATS_NET_LAN == ntohl(type.value)) || (GNUNET_ATS_NET_WAN == ntohl(type.value))) &&
2589 ((ENETUNREACH == errno) || (ENETDOWN == errno)))
2591 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in)))
2593 /* IPv4: "Network unreachable" or "Network down"
2595 * This indicates we do not have connectivity
2597 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2598 _("UDP could not transmit message to `%s': "
2599 "Network seems down, please check your network configuration\n"),
2600 GNUNET_a2s (sa, slen));
2602 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in6)))
2604 /* IPv6: "Network unreachable" or "Network down"
2606 * This indicates that this system is IPv6 enabled, but does not
2607 * have a valid global IPv6 address assigned or we do not have
2611 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2612 _("UDP could not transmit message to `%s': "
2613 "Please check your network configuration and disable IPv6 if your "
2614 "connection does not have a global IPv6 address\n"),
2615 GNUNET_a2s (sa, slen));
2620 LOG (GNUNET_ERROR_TYPE_WARNING,
2621 "UDP could not transmit message to `%s': `%s'\n",
2622 GNUNET_a2s (sa, slen), STRERROR (error));
2628 udp_select_send (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *sock)
2630 const struct sockaddr * sa;
2634 struct UDP_MessageWrapper *udpw = NULL;
2636 /* Find message to send */
2637 udpw = remove_timeout_messages_and_select ((sock == plugin->sockv4) ? plugin->ipv4_queue_head : plugin->ipv6_queue_head,
2640 return 0; /* No message to send */
2642 sa = udpw->session->sock_addr;
2643 slen = udpw->session->addrlen;
2645 sent = GNUNET_NETWORK_socket_sendto (sock, udpw->msg_buf, udpw->msg_size, sa, slen);
2647 if (GNUNET_SYSERR == sent)
2650 analyze_send_error (plugin, sa, slen, errno);
2651 call_continuation(udpw, GNUNET_SYSERR);
2652 GNUNET_STATISTICS_update (plugin->env->stats,
2653 "# UDP, total, bytes, sent, failure",
2655 GNUNET_STATISTICS_update (plugin->env->stats,
2656 "# UDP, total, messages, sent, failure",
2662 LOG (GNUNET_ERROR_TYPE_DEBUG,
2663 "UDP transmitted %u-byte message to `%s' `%s' (%d: %s)\n",
2664 (unsigned int) (udpw->msg_size), GNUNET_i2s(&udpw->session->target) ,GNUNET_a2s (sa, slen), (int) sent,
2665 (sent < 0) ? STRERROR (errno) : "ok");
2666 GNUNET_STATISTICS_update (plugin->env->stats,
2667 "# UDP, total, bytes, sent, success",
2669 GNUNET_STATISTICS_update (plugin->env->stats,
2670 "# UDP, total, messages, sent, success",
2672 if (NULL != udpw->frag_ctx)
2673 udpw->frag_ctx->on_wire_size += udpw->msg_size;
2674 call_continuation (udpw, GNUNET_OK);
2676 dequeue (plugin, udpw);
2685 * We have been notified that our readset has something to read. We don't
2686 * know which socket needs to be read, so we have to check each one
2687 * Then reschedule this function to be called again once more is available.
2689 * @param cls the plugin handle
2690 * @param tc the scheduling context (for rescheduling this function again)
2693 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2695 struct Plugin *plugin = cls;
2697 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
2698 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2700 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
2701 (NULL != plugin->sockv4) &&
2702 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv4)) )
2703 udp_select_read (plugin, plugin->sockv4);
2704 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2705 (NULL != plugin->sockv4) &&
2706 (NULL != plugin->ipv4_queue_head) &&
2707 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv4)) )
2708 udp_select_send (plugin, plugin->sockv4);
2709 schedule_select (plugin);
2714 * We have been notified that our readset has something to read. We don't
2715 * know which socket needs to be read, so we have to check each one
2716 * Then reschedule this function to be called again once more is available.
2718 * @param cls the plugin handle
2719 * @param tc the scheduling context (for rescheduling this function again)
2722 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2724 struct Plugin *plugin = cls;
2726 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2727 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2729 if ( ((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0) &&
2730 (NULL != plugin->sockv6) &&
2731 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv6)) )
2732 udp_select_read (plugin, plugin->sockv6);
2733 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2734 (NULL != plugin->sockv6) && (plugin->ipv6_queue_head != NULL) &&
2735 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv6)) )
2736 udp_select_send (plugin, plugin->sockv6);
2737 schedule_select (plugin);
2743 * @return number of sockets that were successfully bound
2746 setup_sockets (struct Plugin *plugin,
2747 const struct sockaddr_in6 *bind_v6,
2748 const struct sockaddr_in *bind_v4)
2751 int sockets_created = 0;
2752 struct sockaddr_in6 serverAddrv6;
2753 struct sockaddr_in serverAddrv4;
2754 struct sockaddr *serverAddr;
2755 struct sockaddr *addrs[2];
2756 socklen_t addrlens[2];
2760 /* Create IPv6 socket */
2762 if (plugin->enable_ipv6 == GNUNET_YES)
2764 plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
2765 if (NULL == plugin->sockv6)
2767 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2768 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv6 since it is not supported on this system!\n");
2769 plugin->enable_ipv6 = GNUNET_NO;
2773 memset (&serverAddrv6, '\0', sizeof (struct sockaddr_in6));
2774 #if HAVE_SOCKADDR_IN_SIN_LEN
2775 serverAddrv6.sin6_len = sizeof (struct sockaddr_in6);
2777 serverAddrv6.sin6_family = AF_INET6;
2778 if (NULL != bind_v6)
2779 serverAddrv6.sin6_addr = bind_v6->sin6_addr;
2781 serverAddrv6.sin6_addr = in6addr_any;
2783 if (0 == plugin->port) /* autodetect */
2784 serverAddrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2786 serverAddrv6.sin6_port = htons (plugin->port);
2787 addrlen = sizeof (struct sockaddr_in6);
2788 serverAddr = (struct sockaddr *) &serverAddrv6;
2793 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv6 `%s'\n",
2794 GNUNET_a2s (serverAddr, addrlen));
2796 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv6,
2797 serverAddr, addrlen, 0))
2800 if (0 != plugin->port)
2802 tries = 10; /* fail */
2803 break; /* bind failed on specific port */
2806 serverAddrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2811 GNUNET_NETWORK_socket_close (plugin->sockv6);
2812 plugin->enable_ipv6 = GNUNET_NO;
2813 plugin->sockv6 = NULL;
2816 if (plugin->sockv6 != NULL)
2818 LOG (GNUNET_ERROR_TYPE_DEBUG,
2819 "IPv6 socket created on port %s\n",
2820 GNUNET_a2s (serverAddr, addrlen));
2821 addrs[sockets_created] = (struct sockaddr *) &serverAddrv6;
2822 addrlens[sockets_created] = sizeof (struct sockaddr_in6);
2827 LOG (GNUNET_ERROR_TYPE_ERROR,
2828 "Failed to bind UDP socket to %s: %s\n",
2829 GNUNET_a2s (serverAddr, addrlen),
2835 /* Create IPv4 socket */
2837 plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
2838 if (NULL == plugin->sockv4)
2840 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2841 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv4 since it is not supported on this system!\n");
2842 plugin->enable_ipv4 = GNUNET_NO;
2846 memset (&serverAddrv4, '\0', sizeof (struct sockaddr_in));
2847 #if HAVE_SOCKADDR_IN_SIN_LEN
2848 serverAddrv4.sin_len = sizeof (struct sockaddr_in);
2850 serverAddrv4.sin_family = AF_INET;
2851 if (NULL != bind_v4)
2852 serverAddrv4.sin_addr = bind_v4->sin_addr;
2854 serverAddrv4.sin_addr.s_addr = INADDR_ANY;
2856 if (0 == plugin->port)
2858 serverAddrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2860 serverAddrv4.sin_port = htons (plugin->port);
2863 addrlen = sizeof (struct sockaddr_in);
2864 serverAddr = (struct sockaddr *) &serverAddrv4;
2869 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv4 `%s'\n",
2870 GNUNET_a2s (serverAddr, addrlen));
2873 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv4,
2874 serverAddr, addrlen, 0))
2877 if (0 != plugin->port)
2879 tries = 10; /* fail */
2880 break; /* bind failed on specific port */
2884 serverAddrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2890 GNUNET_NETWORK_socket_close (plugin->sockv4);
2891 plugin->enable_ipv4 = GNUNET_NO;
2892 plugin->sockv4 = NULL;
2895 if (plugin->sockv4 != NULL)
2897 LOG (GNUNET_ERROR_TYPE_DEBUG,
2898 "IPv4 socket created on port %s\n", GNUNET_a2s (serverAddr, addrlen));
2899 addrs[sockets_created] = (struct sockaddr *) &serverAddrv4;
2900 addrlens[sockets_created] = sizeof (struct sockaddr_in);
2905 LOG (GNUNET_ERROR_TYPE_ERROR,
2906 "Failed to bind UDP socket to %s: %s\n",
2907 GNUNET_a2s (serverAddr, addrlen), STRERROR (eno));
2911 if (0 == sockets_created)
2913 LOG (GNUNET_ERROR_TYPE_WARNING, _("Failed to open UDP sockets\n"));
2914 return 0; /* No sockets created, return */
2917 /* Create file descriptors */
2918 if (plugin->enable_ipv4 == GNUNET_YES)
2920 plugin->rs_v4 = GNUNET_NETWORK_fdset_create ();
2921 plugin->ws_v4 = GNUNET_NETWORK_fdset_create ();
2922 GNUNET_NETWORK_fdset_zero (plugin->rs_v4);
2923 GNUNET_NETWORK_fdset_zero (plugin->ws_v4);
2924 if (NULL != plugin->sockv4)
2926 GNUNET_NETWORK_fdset_set (plugin->rs_v4, plugin->sockv4);
2927 GNUNET_NETWORK_fdset_set (plugin->ws_v4, plugin->sockv4);
2931 if (plugin->enable_ipv6 == GNUNET_YES)
2933 plugin->rs_v6 = GNUNET_NETWORK_fdset_create ();
2934 plugin->ws_v6 = GNUNET_NETWORK_fdset_create ();
2935 GNUNET_NETWORK_fdset_zero (plugin->rs_v6);
2936 GNUNET_NETWORK_fdset_zero (plugin->ws_v6);
2937 if (NULL != plugin->sockv6)
2939 GNUNET_NETWORK_fdset_set (plugin->rs_v6, plugin->sockv6);
2940 GNUNET_NETWORK_fdset_set (plugin->ws_v6, plugin->sockv6);
2944 schedule_select (plugin);
2945 plugin->nat = GNUNET_NAT_register (plugin->env->cfg,
2946 GNUNET_NO, plugin->port,
2948 (const struct sockaddr **) addrs, addrlens,
2949 &udp_nat_port_map_callback, NULL, plugin);
2951 return sockets_created;
2956 * The exported method. Makes the core api available via a global and
2957 * returns the udp transport API.
2959 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
2960 * @return our 'struct GNUNET_TRANSPORT_PluginFunctions'
2963 libgnunet_plugin_transport_udp_init (void *cls)
2965 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2966 struct GNUNET_TRANSPORT_PluginFunctions *api;
2968 unsigned long long port;
2969 unsigned long long aport;
2970 unsigned long long broadcast;
2971 unsigned long long udp_max_bps;
2972 unsigned long long enable_v6;
2973 char * bind4_address;
2974 char * bind6_address;
2975 char * fancy_interval;
2976 struct GNUNET_TIME_Relative interval;
2977 struct sockaddr_in serverAddrv4;
2978 struct sockaddr_in6 serverAddrv6;
2983 if (NULL == env->receive)
2985 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
2986 initialze the plugin or the API */
2987 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
2989 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
2990 api->address_to_string = &udp_address_to_string;
2991 api->string_to_address = &udp_string_to_address;
2995 GNUNET_assert (NULL != env->stats);
2997 /* Get port number: port == 0 : autodetect a port,
2998 * > 0 : use this port,
2999 * not given : 2086 default */
3001 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp", "PORT",
3005 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3006 "ADVERTISED_PORT", &aport))
3010 LOG (GNUNET_ERROR_TYPE_WARNING,
3011 _("Given `%s' option is out of range: %llu > %u\n"), "PORT", port,
3018 GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "nat",
3020 enable_v6 = GNUNET_NO;
3022 enable_v6 = GNUNET_YES;
3025 have_bind4 = GNUNET_NO;
3026 memset (&serverAddrv4, 0, sizeof (serverAddrv4));
3028 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3029 "BINDTO", &bind4_address))
3031 LOG (GNUNET_ERROR_TYPE_DEBUG,
3032 "Binding udp plugin to specific address: `%s'\n",
3034 if (1 != inet_pton (AF_INET, bind4_address, &serverAddrv4.sin_addr))
3036 GNUNET_free (bind4_address);
3039 have_bind4 = GNUNET_YES;
3041 GNUNET_free_non_null (bind4_address);
3042 have_bind6 = GNUNET_NO;
3043 memset (&serverAddrv6, 0, sizeof (serverAddrv6));
3045 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3046 "BINDTO6", &bind6_address))
3048 LOG (GNUNET_ERROR_TYPE_DEBUG,
3049 "Binding udp plugin to specific address: `%s'\n",
3052 inet_pton (AF_INET6, bind6_address, &serverAddrv6.sin6_addr))
3054 LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid IPv6 address: `%s'\n"),
3056 GNUNET_free (bind6_address);
3059 have_bind6 = GNUNET_YES;
3061 GNUNET_free_non_null (bind6_address);
3063 /* Initialize my flags */
3066 /* Enable neighbour discovery */
3067 broadcast = GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "transport-udp",
3069 if (broadcast == GNUNET_SYSERR)
3070 broadcast = GNUNET_NO;
3072 if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3073 "BROADCAST_INTERVAL", &fancy_interval))
3075 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
3079 if (GNUNET_SYSERR == GNUNET_STRINGS_fancy_time_to_relative(fancy_interval, &interval))
3081 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30);
3083 GNUNET_free (fancy_interval);
3086 /* Maximum datarate */
3087 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3088 "MAX_BPS", &udp_max_bps))
3090 udp_max_bps = 1024 * 1024 * 50; /* 50 MB/s == infinity for practical purposes */
3093 p = GNUNET_malloc (sizeof (struct Plugin));
3096 p->broadcast_interval = interval;
3097 p->enable_ipv6 = enable_v6;
3098 p->enable_ipv4 = GNUNET_YES; /* default */
3100 p->sessions = GNUNET_CONTAINER_multihashmap_create (10, GNUNET_NO);
3101 p->defrag_ctxs = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
3102 p->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages, p);
3103 GNUNET_BANDWIDTH_tracker_init (&p->tracker,
3104 GNUNET_BANDWIDTH_value_init ((uint32_t)udp_max_bps), 30);
3107 LOG (GNUNET_ERROR_TYPE_DEBUG, "Setting up sockets\n");
3108 res = setup_sockets (p, (GNUNET_YES == have_bind6) ? &serverAddrv6 : NULL,
3109 (GNUNET_YES == have_bind4) ? &serverAddrv4 : NULL);
3110 if ((res == 0) || ((p->sockv4 == NULL) && (p->sockv6 == NULL)))
3112 LOG (GNUNET_ERROR_TYPE_ERROR,
3113 _("Failed to create network sockets, plugin failed\n"));
3114 GNUNET_CONTAINER_multihashmap_destroy (p->sessions);
3115 GNUNET_CONTAINER_heap_destroy (p->defrag_ctxs);
3116 GNUNET_SERVER_mst_destroy (p->mst);
3120 else if (broadcast == GNUNET_YES)
3122 LOG (GNUNET_ERROR_TYPE_DEBUG, "Starting broadcasting\n");
3123 setup_broadcast (p, &serverAddrv6, &serverAddrv4);
3126 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
3129 api->disconnect = &udp_disconnect;
3130 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3131 api->address_to_string = &udp_address_to_string;
3132 api->string_to_address = &udp_string_to_address;
3133 api->check_address = &udp_plugin_check_address;
3134 api->get_session = &udp_plugin_get_session;
3135 api->send = &udp_plugin_send;
3136 api->get_network = &udp_get_network;
3143 heap_cleanup_iterator (void *cls,
3144 struct GNUNET_CONTAINER_HeapNode *
3145 node, void *element,
3146 GNUNET_CONTAINER_HeapCostType
3149 struct DefragContext * d_ctx = element;
3151 GNUNET_CONTAINER_heap_remove_node (node);
3152 GNUNET_DEFRAGMENT_context_destroy(d_ctx->defrag);
3153 GNUNET_free (d_ctx);
3160 * The exported method. Makes the core api available via a global and
3161 * returns the udp transport API.
3163 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
3167 libgnunet_plugin_transport_udp_done (void *cls)
3169 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
3170 struct Plugin *plugin = api->cls;
3171 struct PrettyPrinterContext *cur;
3172 struct PrettyPrinterContext *next;
3180 stop_broadcast (plugin);
3181 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
3183 GNUNET_SCHEDULER_cancel (plugin->select_task);
3184 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
3186 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK)
3188 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
3189 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
3192 /* Closing sockets */
3193 if (GNUNET_YES ==plugin->enable_ipv4)
3195 if (plugin->sockv4 != NULL)
3197 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
3198 plugin->sockv4 = NULL;
3200 GNUNET_NETWORK_fdset_destroy (plugin->rs_v4);
3201 GNUNET_NETWORK_fdset_destroy (plugin->ws_v4);
3203 if (GNUNET_YES ==plugin->enable_ipv6)
3205 if (plugin->sockv6 != NULL)
3207 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
3208 plugin->sockv6 = NULL;
3210 GNUNET_NETWORK_fdset_destroy (plugin->rs_v6);
3211 GNUNET_NETWORK_fdset_destroy (plugin->ws_v6);
3214 if (NULL != plugin->nat)
3215 GNUNET_NAT_unregister (plugin->nat);
3217 if (plugin->defrag_ctxs != NULL)
3219 GNUNET_CONTAINER_heap_iterate(plugin->defrag_ctxs,
3220 heap_cleanup_iterator, NULL);
3221 GNUNET_CONTAINER_heap_destroy(plugin->defrag_ctxs);
3222 plugin->defrag_ctxs = NULL;
3224 if (plugin->mst != NULL)
3226 GNUNET_SERVER_mst_destroy(plugin->mst);
3230 /* Clean up leftover messages */
3231 struct UDP_MessageWrapper * udpw;
3232 udpw = plugin->ipv4_queue_head;
3233 while (udpw != NULL)
3235 struct UDP_MessageWrapper *tmp = udpw->next;
3236 dequeue (plugin, udpw);
3237 call_continuation(udpw, GNUNET_SYSERR);
3242 udpw = plugin->ipv6_queue_head;
3243 while (udpw != NULL)
3245 struct UDP_MessageWrapper *tmp = udpw->next;
3246 dequeue (plugin, udpw);
3247 call_continuation(udpw, GNUNET_SYSERR);
3253 /* Clean up sessions */
3254 LOG (GNUNET_ERROR_TYPE_DEBUG,
3255 "Cleaning up sessions\n");
3256 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions, &disconnect_and_free_it, plugin);
3257 GNUNET_CONTAINER_multihashmap_destroy (plugin->sessions);
3259 next = ppc_dll_head;
3260 for (cur = next; NULL != cur; cur = next)
3263 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, cur);
3264 GNUNET_RESOLVER_request_cancel (cur->resolver_handle);
3265 GNUNET_SCHEDULER_cancel (cur->timeout_task);
3271 GNUNET_free (plugin);
3274 struct Allocation *allocation;
3275 while (NULL != ahead)
3278 GNUNET_CONTAINER_DLL_remove (ahead, atail, allocation);
3279 GNUNET_free (allocation);
3281 struct Allocator *allocator;
3282 while (NULL != aehead)
3285 GNUNET_CONTAINER_DLL_remove (aehead, aetail, allocator);
3286 GNUNET_free (allocator);
3293 /* end of plugin_transport_udp.c */