2 This file is part of GNUnet
3 (C) 2010-2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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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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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
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;
562 if (addrlen == sizeof (struct IPv6UdpAddress))
566 options = ntohl (t6->options);
567 port = ntohs (t6->u6_port);
568 memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
571 else if (addrlen == sizeof (struct IPv4UdpAddress))
575 options = ntohl (t4->options);
576 port = ntohs (t4->u4_port);
577 memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
580 else if (addrlen == 0)
582 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s", TRANSPORT_SESSION_INBOUND_STRING);
589 inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
591 GNUNET_snprintf (rbuf, sizeof (rbuf),
592 (af == AF_INET6) ? "%s.%u.[%s]:%u" : "%s.%u.%s:%u",
593 PLUGIN_NAME, options, buf, port);
599 * Function called to convert a string address to
602 * @param cls closure ('struct Plugin*')
603 * @param addr string address
604 * @param addrlen length of the address
605 * @param buf location to store the buffer
606 * @param added location to store the number of bytes in the buffer.
607 * If the function returns GNUNET_SYSERR, its contents are undefined.
608 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
611 udp_string_to_address (void *cls, const char *addr, uint16_t addrlen,
612 void **buf, size_t *added)
614 struct sockaddr_storage socket_address;
620 /* Format tcp.options.address:port */
625 if ((NULL == addr) || (addrlen == 0))
628 return GNUNET_SYSERR;
630 if ('\0' != addr[addrlen - 1])
633 return GNUNET_SYSERR;
635 if (strlen (addr) != addrlen - 1)
638 return GNUNET_SYSERR;
640 plugin = GNUNET_strdup (addr);
641 optionstr = strchr (plugin, '.');
642 if (NULL == optionstr)
645 GNUNET_free (plugin);
646 return GNUNET_SYSERR;
650 options = atol (optionstr);
651 address = strchr (optionstr, '.');
655 GNUNET_free (plugin);
656 return GNUNET_SYSERR;
662 GNUNET_STRINGS_to_address_ip (address, strlen (address),
666 GNUNET_free (plugin);
667 return GNUNET_SYSERR;
670 GNUNET_free (plugin);
672 switch (socket_address.ss_family)
676 struct IPv4UdpAddress *u4;
677 struct sockaddr_in *in4 = (struct sockaddr_in *) &socket_address;
678 u4 = GNUNET_malloc (sizeof (struct IPv4UdpAddress));
679 u4->options = htonl (options);
680 u4->ipv4_addr = in4->sin_addr.s_addr;
681 u4->u4_port = in4->sin_port;
683 *added = sizeof (struct IPv4UdpAddress);
688 struct IPv6UdpAddress *u6;
689 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &socket_address;
690 u6 = GNUNET_malloc (sizeof (struct IPv6UdpAddress));
691 u6->options = htonl (options);
692 u6->ipv6_addr = in6->sin6_addr;
693 u6->u6_port = in6->sin6_port;
695 *added = sizeof (struct IPv6UdpAddress);
700 return GNUNET_SYSERR;
706 ppc_cancel_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
708 struct PrettyPrinterContext *ppc = cls;
709 /* GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PPC %p was not removed!\n", ppc); */
710 ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
711 if (NULL != ppc->resolver_handle)
713 GNUNET_RESOLVER_request_cancel (ppc->resolver_handle);
714 ppc->resolver_handle = NULL;
717 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, ppc);
723 * Append our port and forward the result.
725 * @param cls a 'struct PrettyPrinterContext'
726 * @param hostname result from DNS resolver
729 append_port (void *cls, const char *hostname)
731 struct PrettyPrinterContext *ppc = cls;
732 struct PrettyPrinterContext *cur;
734 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "PPC callback: %p `%s'\n",ppc, hostname); */
735 if (hostname == NULL)
737 ppc->asc (ppc->asc_cls, NULL);
738 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, ppc);
739 GNUNET_SCHEDULER_cancel (ppc->timeout_task);
740 ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
741 ppc->resolver_handle = NULL;
742 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "PPC %p was removed!\n", ppc); */
746 for (cur = ppc_dll_head; (NULL != cur); cur = cur->next)
753 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid callback for PPC %p \n", ppc);
757 if (GNUNET_YES == ppc->ipv6)
758 GNUNET_asprintf (&ret, "%s.%u.[%s]:%d", PLUGIN_NAME, ppc->options, hostname, ppc->port);
760 GNUNET_asprintf (&ret, "%s.%u.%s:%d", PLUGIN_NAME, ppc->options, hostname, ppc->port);
761 ppc->asc (ppc->asc_cls, ret);
766 * Convert the transports address to a nice, human-readable
770 * @param type name of the transport that generated the address
771 * @param addr one of the addresses of the host, NULL for the last address
772 * the specific address format depends on the transport
773 * @param addrlen length of the address
774 * @param numeric should (IP) addresses be displayed in numeric form?
775 * @param timeout after how long should we give up?
776 * @param asc function to call on each string
777 * @param asc_cls closure for asc
780 udp_plugin_address_pretty_printer (void *cls, const char *type,
781 const void *addr, size_t addrlen,
783 struct GNUNET_TIME_Relative timeout,
784 GNUNET_TRANSPORT_AddressStringCallback asc,
787 struct PrettyPrinterContext *ppc;
790 struct sockaddr_in a4;
791 struct sockaddr_in6 a6;
792 const struct IPv4UdpAddress *u4;
793 const struct IPv6UdpAddress *u6;
797 if (addrlen == sizeof (struct IPv6UdpAddress))
800 memset (&a6, 0, sizeof (a6));
801 a6.sin6_family = AF_INET6;
802 #if HAVE_SOCKADDR_IN_SIN_LEN
803 a6.sin6_len = sizeof (a6);
805 a6.sin6_port = u6->u6_port;
806 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof (struct in6_addr));
807 port = ntohs (u6->u6_port);
808 options = ntohl (u6->options);
812 else if (addrlen == sizeof (struct IPv4UdpAddress))
815 memset (&a4, 0, sizeof (a4));
816 a4.sin_family = AF_INET;
817 #if HAVE_SOCKADDR_IN_SIN_LEN
818 a4.sin_len = sizeof (a4);
820 a4.sin_port = u4->u4_port;
821 a4.sin_addr.s_addr = u4->ipv4_addr;
822 port = ntohs (u4->u4_port);
823 options = ntohl (u4->options);
827 else if (0 == addrlen)
829 asc (asc_cls, TRANSPORT_SESSION_INBOUND_STRING);
835 /* invalid address */
840 ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
842 ppc->asc_cls = asc_cls;
844 ppc->options = options;
845 if (addrlen == sizeof (struct IPv6UdpAddress))
846 ppc->ipv6 = GNUNET_YES;
848 ppc->ipv6 = GNUNET_NO;
849 ppc->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply(timeout, 2),
850 &ppc_cancel_task, ppc);
851 GNUNET_CONTAINER_DLL_insert (ppc_dll_head, ppc_dll_tail, ppc);
852 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "PPC %p was created!\n", ppc); */
853 ppc->resolver_handle = GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric, timeout, &append_port, ppc);
859 call_continuation (struct UDP_MessageWrapper *udpw, int result)
863 LOG (GNUNET_ERROR_TYPE_DEBUG,
864 "Calling continuation for %u byte message to `%s' with result %s\n",
865 udpw->payload_size, GNUNET_i2s (&udpw->session->target),
866 (GNUNET_OK == result) ? "OK" : "SYSERR");
868 if (udpw->msg_size >= udpw->payload_size)
869 overhead = udpw->msg_size - udpw->payload_size;
871 overhead = udpw->msg_size;
875 switch (udpw->msg_type) {
876 case MSG_UNFRAGMENTED:
877 if (NULL != udpw->cont)
879 /* Transport continuation */
880 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
881 udpw->payload_size, udpw->msg_size);
883 GNUNET_STATISTICS_update (plugin->env->stats,
884 "# UDP, unfragmented msgs, messages, sent, success",
886 GNUNET_STATISTICS_update (plugin->env->stats,
887 "# UDP, unfragmented msgs, bytes payload, sent, success",
888 udpw->payload_size, GNUNET_NO);
889 GNUNET_STATISTICS_update (plugin->env->stats,
890 "# UDP, unfragmented msgs, bytes overhead, sent, success",
891 overhead, GNUNET_NO);
892 GNUNET_STATISTICS_update (plugin->env->stats,
893 "# UDP, total, bytes overhead, sent",
894 overhead, GNUNET_NO);
895 GNUNET_STATISTICS_update (plugin->env->stats,
896 "# UDP, total, bytes payload, sent",
897 udpw->payload_size, GNUNET_NO);
899 case MSG_FRAGMENTED_COMPLETE:
900 GNUNET_assert (NULL != udpw->frag_ctx);
901 if (udpw->frag_ctx->cont != NULL)
902 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_OK,
903 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
904 GNUNET_STATISTICS_update (plugin->env->stats,
905 "# UDP, fragmented msgs, messages, sent, success",
907 GNUNET_STATISTICS_update (plugin->env->stats,
908 "# UDP, fragmented msgs, bytes payload, sent, success",
909 udpw->payload_size, GNUNET_NO);
910 GNUNET_STATISTICS_update (plugin->env->stats,
911 "# UDP, fragmented msgs, bytes overhead, sent, success",
912 overhead, GNUNET_NO);
913 GNUNET_STATISTICS_update (plugin->env->stats,
914 "# UDP, total, bytes overhead, sent",
915 overhead, GNUNET_NO);
916 GNUNET_STATISTICS_update (plugin->env->stats,
917 "# UDP, total, bytes payload, sent",
918 udpw->payload_size, GNUNET_NO);
919 GNUNET_STATISTICS_update (plugin->env->stats,
920 "# UDP, fragmented msgs, messages, pending",
924 /* Fragmented message: enqueue next fragment */
925 if (NULL != udpw->cont)
926 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
927 udpw->payload_size, udpw->msg_size);
928 GNUNET_STATISTICS_update (plugin->env->stats,
929 "# UDP, fragmented msgs, fragments, sent, success",
931 GNUNET_STATISTICS_update (plugin->env->stats,
932 "# UDP, fragmented msgs, fragments bytes, sent, success",
933 udpw->msg_size, GNUNET_NO);
936 /* No continuation */
937 GNUNET_STATISTICS_update (plugin->env->stats,
938 "# UDP, ACK msgs, messages, sent, success",
940 GNUNET_STATISTICS_update (plugin->env->stats,
941 "# UDP, ACK msgs, bytes overhead, sent, success",
942 overhead, GNUNET_NO);
943 GNUNET_STATISTICS_update (plugin->env->stats,
944 "# UDP, total, bytes overhead, sent",
945 overhead, GNUNET_NO);
951 LOG (GNUNET_ERROR_TYPE_ERROR,
952 "ERROR: %u\n", udpw->msg_type);
958 switch (udpw->msg_type) {
959 case MSG_UNFRAGMENTED:
960 /* Unfragmented message: failed to send */
961 if (NULL != udpw->cont)
962 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
963 udpw->payload_size, overhead);
964 GNUNET_STATISTICS_update (plugin->env->stats,
965 "# UDP, unfragmented msgs, messages, sent, failure",
967 GNUNET_STATISTICS_update (plugin->env->stats,
968 "# UDP, unfragmented msgs, bytes payload, sent, failure",
969 udpw->payload_size, GNUNET_NO);
970 GNUNET_STATISTICS_update (plugin->env->stats,
971 "# UDP, unfragmented msgs, bytes overhead, sent, failure",
972 overhead, GNUNET_NO);
974 case MSG_FRAGMENTED_COMPLETE:
975 GNUNET_assert (NULL != udpw->frag_ctx);
976 if (udpw->frag_ctx->cont != NULL)
977 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_SYSERR,
978 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
979 GNUNET_STATISTICS_update (plugin->env->stats,
980 "# UDP, fragmented msgs, messages, sent, failure",
982 GNUNET_STATISTICS_update (plugin->env->stats,
983 "# UDP, fragmented msgs, bytes payload, sent, failure",
984 udpw->payload_size, GNUNET_NO);
985 GNUNET_STATISTICS_update (plugin->env->stats,
986 "# UDP, fragmented msgs, bytes payload, sent, failure",
987 overhead, GNUNET_NO);
988 GNUNET_STATISTICS_update (plugin->env->stats,
989 "# UDP, fragmented msgs, bytes payload, sent, failure",
990 overhead, GNUNET_NO);
991 GNUNET_STATISTICS_update (plugin->env->stats,
992 "# UDP, fragmented msgs, messages, pending",
996 GNUNET_assert (NULL != udpw->frag_ctx);
997 /* Fragmented message: failed to send */
998 GNUNET_STATISTICS_update (plugin->env->stats,
999 "# UDP, fragmented msgs, fragments, sent, failure",
1001 GNUNET_STATISTICS_update (plugin->env->stats,
1002 "# UDP, fragmented msgs, fragments bytes, sent, failure",
1003 udpw->msg_size, GNUNET_NO);
1006 /* ACK message: failed to send */
1007 GNUNET_STATISTICS_update (plugin->env->stats,
1008 "# UDP, ACK msgs, messages, sent, failure",
1012 /* Beacon message: failed to send */
1028 * Check if the given port is plausible (must be either our listen
1029 * port or our advertised port). If it is neither, we return
1032 * @param plugin global variables
1033 * @param in_port port number to check
1034 * @return GNUNET_OK if port is either open_port or adv_port
1037 check_port (struct Plugin *plugin, uint16_t in_port)
1039 if ((in_port == plugin->port) || (in_port == plugin->aport))
1041 return GNUNET_SYSERR;
1046 * Function that will be called to check if a binary address for this
1047 * plugin is well-formed and corresponds to an address for THIS peer
1048 * (as per our configuration). Naturally, if absolutely necessary,
1049 * plugins can be a bit conservative in their answer, but in general
1050 * plugins should make sure that the address does not redirect
1051 * traffic to a 3rd party that might try to man-in-the-middle our
1054 * @param cls closure, should be our handle to the Plugin
1055 * @param addr pointer to the address
1056 * @param addrlen length of addr
1057 * @return GNUNET_OK if this is a plausible address for this peer
1058 * and transport, GNUNET_SYSERR if not
1062 udp_plugin_check_address (void *cls, const void *addr, size_t addrlen)
1064 struct Plugin *plugin = cls;
1065 struct IPv4UdpAddress *v4;
1066 struct IPv6UdpAddress *v6;
1068 if ((addrlen != sizeof (struct IPv4UdpAddress)) &&
1069 (addrlen != sizeof (struct IPv6UdpAddress)))
1071 return GNUNET_SYSERR;
1073 if (addrlen == sizeof (struct IPv4UdpAddress))
1075 v4 = (struct IPv4UdpAddress *) addr;
1076 if (GNUNET_OK != check_port (plugin, ntohs (v4->u4_port)))
1077 return GNUNET_SYSERR;
1079 GNUNET_NAT_test_address (plugin->nat, &v4->ipv4_addr,
1080 sizeof (struct in_addr)))
1081 return GNUNET_SYSERR;
1085 v6 = (struct IPv6UdpAddress *) addr;
1086 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1088 GNUNET_break_op (0);
1089 return GNUNET_SYSERR;
1091 if (GNUNET_OK != check_port (plugin, ntohs (v6->u6_port)))
1092 return GNUNET_SYSERR;
1094 GNUNET_NAT_test_address (plugin->nat, &v6->ipv6_addr,
1095 sizeof (struct in6_addr)))
1096 return GNUNET_SYSERR;
1103 * Task to free resources associated with a session.
1105 * @param s session to free
1108 free_session (struct Session *s)
1110 if (NULL != s->frag_ctx)
1112 GNUNET_FRAGMENT_context_destroy(s->frag_ctx->frag, NULL, NULL);
1113 GNUNET_free (s->frag_ctx);
1121 dequeue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1123 if (plugin->bytes_in_buffer < udpw->msg_size)
1127 GNUNET_STATISTICS_update (plugin->env->stats,
1128 "# UDP, total, bytes in buffers",
1129 - (long long) udpw->msg_size, GNUNET_NO);
1130 plugin->bytes_in_buffer -= udpw->msg_size;
1132 GNUNET_STATISTICS_update (plugin->env->stats,
1133 "# UDP, total, msgs in buffers",
1135 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1136 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_queue_head,
1137 plugin->ipv4_queue_tail, udpw);
1138 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1139 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_queue_head,
1140 plugin->ipv6_queue_tail, udpw);
1145 fragmented_message_done (struct UDP_FragmentationContext *fc, int result)
1147 struct UDP_MessageWrapper *udpw;
1148 struct UDP_MessageWrapper *tmp;
1149 struct UDP_MessageWrapper dummy;
1150 struct Session *s = fc->session;
1152 LOG (GNUNET_ERROR_TYPE_DEBUG,
1153 "%p : Fragmented message removed with result %s\n",
1155 (result == GNUNET_SYSERR) ? "FAIL" : "SUCCESS");
1157 /* Call continuation for fragmented message */
1158 memset (&dummy, 0, sizeof (dummy));
1159 dummy.msg_type = MSG_FRAGMENTED_COMPLETE;
1160 dummy.msg_size = s->frag_ctx->on_wire_size;
1161 dummy.payload_size = s->frag_ctx->payload_size;
1162 dummy.frag_ctx = s->frag_ctx;
1164 dummy.cont_cls = NULL;
1167 call_continuation (&dummy, result);
1169 /* Remove leftover fragments from queue */
1170 if (s->addrlen == sizeof (struct sockaddr_in6))
1172 udpw = plugin->ipv6_queue_head;
1173 while (NULL != udpw)
1176 if ((udpw->frag_ctx != NULL) && (udpw->frag_ctx == s->frag_ctx))
1178 dequeue (plugin, udpw);
1179 call_continuation (udpw, GNUNET_SYSERR);
1185 if (s->addrlen == sizeof (struct sockaddr_in))
1187 udpw = plugin->ipv4_queue_head;
1191 if ((NULL != udpw->frag_ctx) && (udpw->frag_ctx == s->frag_ctx))
1193 dequeue (plugin, udpw);
1194 call_continuation (udpw, GNUNET_SYSERR);
1201 /* Destroy fragmentation context */
1202 GNUNET_FRAGMENT_context_destroy (fc->frag,
1203 &s->last_expected_msg_delay,
1204 &s->last_expected_ack_delay);
1210 * Functions with this signature are called whenever we need
1211 * to close a session due to a disconnect or failure to
1212 * establish a connection.
1214 * @param s session to close down
1217 disconnect_session (struct Session *s)
1219 struct UDP_MessageWrapper *udpw;
1220 struct UDP_MessageWrapper *next;
1222 GNUNET_assert (GNUNET_YES != s->in_destroy);
1223 LOG (GNUNET_ERROR_TYPE_DEBUG,
1224 "Session %p to peer `%s' address ended \n",
1226 GNUNET_i2s (&s->target),
1227 GNUNET_a2s (s->sock_addr, s->addrlen));
1228 stop_session_timeout (s);
1230 if (NULL != s->frag_ctx)
1232 /* Remove fragmented message due to disconnect */
1233 fragmented_message_done (s->frag_ctx, GNUNET_SYSERR);
1236 next = plugin->ipv4_queue_head;
1237 while (NULL != (udpw = next))
1240 if (udpw->session == s)
1242 dequeue (plugin, udpw);
1243 call_continuation(udpw, GNUNET_SYSERR);
1247 next = plugin->ipv6_queue_head;
1248 while (NULL != (udpw = next))
1251 if (udpw->session == s)
1253 dequeue (plugin, udpw);
1254 call_continuation(udpw, GNUNET_SYSERR);
1258 plugin->env->session_end (plugin->env->cls, &s->target, s);
1260 if (NULL != s->frag_ctx)
1262 if (NULL != s->frag_ctx->cont)
1264 s->frag_ctx->cont (s->frag_ctx->cont_cls, &s->target, GNUNET_SYSERR,
1265 s->frag_ctx->payload_size, s->frag_ctx->on_wire_size);
1266 LOG (GNUNET_ERROR_TYPE_DEBUG,
1267 "Calling continuation for fragemented message to `%s' with result SYSERR\n",
1268 GNUNET_i2s (&s->target));
1272 GNUNET_assert (GNUNET_YES ==
1273 GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
1274 &s->target.hashPubKey,
1276 GNUNET_STATISTICS_set(plugin->env->stats,
1277 "# UDP, sessions active",
1278 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1281 s->in_destroy = GNUNET_YES;
1287 * Destroy a session, plugin is being unloaded.
1290 * @param key hash of public key of target peer
1291 * @param value a 'struct PeerSession*' to clean up
1292 * @return GNUNET_OK (continue to iterate)
1295 disconnect_and_free_it (void *cls, const struct GNUNET_HashCode * key, void *value)
1297 disconnect_session(value);
1303 * Disconnect from a remote node. Clean up session if we have one for this peer
1305 * @param cls closure for this call (should be handle to Plugin)
1306 * @param target the peeridentity of the peer to disconnect
1307 * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
1310 udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
1312 struct Plugin *plugin = cls;
1313 GNUNET_assert (plugin != NULL);
1315 GNUNET_assert (target != NULL);
1316 LOG (GNUNET_ERROR_TYPE_DEBUG,
1317 "Disconnecting from peer `%s'\n", GNUNET_i2s (target));
1318 /* Clean up sessions */
1319 GNUNET_CONTAINER_multihashmap_get_multiple (plugin->sessions, &target->hashPubKey, &disconnect_and_free_it, plugin);
1324 * Session was idle, so disconnect it
1327 session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1329 GNUNET_assert (NULL != cls);
1330 struct Session *s = cls;
1332 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1334 "Session %p was idle for %s, disconnecting\n",
1336 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1338 /* call session destroy function */
1339 disconnect_session (s);
1344 * Start session timeout
1347 start_session_timeout (struct Session *s)
1349 GNUNET_assert (NULL != s);
1350 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s->timeout_task);
1351 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1354 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1355 "Timeout for session %p set to %s\n",
1357 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1363 * Increment session timeout due to activity
1366 reschedule_session_timeout (struct Session *s)
1368 GNUNET_assert (NULL != s);
1369 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
1371 GNUNET_SCHEDULER_cancel (s->timeout_task);
1372 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1375 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1376 "Timeout rescheduled for session %p set to %s\n",
1378 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1383 static struct Session *
1384 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
1385 const void *addr, size_t addrlen,
1386 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1389 const struct IPv4UdpAddress *t4;
1390 const struct IPv6UdpAddress *t6;
1391 struct sockaddr_in *v4;
1392 struct sockaddr_in6 *v6;
1397 case sizeof (struct IPv4UdpAddress):
1398 if (NULL == plugin->sockv4)
1400 LOG (GNUNET_ERROR_TYPE_DEBUG,
1401 "Could not create session for peer `%s' address `%s': IPv4 is not enabled\n",
1403 udp_address_to_string(NULL, addr, addrlen));
1407 s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in));
1408 len = sizeof (struct sockaddr_in);
1409 v4 = (struct sockaddr_in *) &s[1];
1410 v4->sin_family = AF_INET;
1411 #if HAVE_SOCKADDR_IN_SIN_LEN
1412 v4->sin_len = sizeof (struct sockaddr_in);
1414 v4->sin_port = t4->u4_port;
1415 v4->sin_addr.s_addr = t4->ipv4_addr;
1416 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v4, sizeof (struct sockaddr_in));
1418 case sizeof (struct IPv6UdpAddress):
1419 if (NULL == plugin->sockv6)
1421 LOG (GNUNET_ERROR_TYPE_INFO,
1422 "Could not create session for peer `%s' address `%s': IPv6 is not enabled\n",
1424 udp_address_to_string(NULL, addr, addrlen));
1428 s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in6));
1429 len = sizeof (struct sockaddr_in6);
1430 v6 = (struct sockaddr_in6 *) &s[1];
1431 v6->sin6_family = AF_INET6;
1432 #if HAVE_SOCKADDR_IN_SIN_LEN
1433 v6->sin6_len = sizeof (struct sockaddr_in6);
1435 v6->sin6_port = t6->u6_port;
1436 v6->sin6_addr = t6->ipv6_addr;
1437 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v6, sizeof (struct sockaddr_in6));
1440 /* Must have a valid address to send to */
1441 GNUNET_STATISTICS_update (plugin->env->stats,
1443 ("# requests to create session with invalid address"),
1448 s->target = *target;
1449 s->sock_addr = (const struct sockaddr *) &s[1];
1450 s->last_expected_ack_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 250);
1451 s->last_expected_msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
1452 s->flow_delay_from_other_peer = GNUNET_TIME_UNIT_ZERO_ABS;
1453 s->flow_delay_for_other_peer = GNUNET_TIME_UNIT_ZERO;
1454 s->inbound = GNUNET_NO;
1455 start_session_timeout (s);
1461 session_cmp_it (void *cls,
1462 const struct GNUNET_HashCode * key,
1465 struct SessionCompareContext * cctx = cls;
1466 const struct GNUNET_HELLO_Address *address = cctx->addr;
1467 struct Session *s = value;
1469 socklen_t s_addrlen = s->addrlen;
1471 LOG (GNUNET_ERROR_TYPE_DEBUG,
1472 "Comparing address %s <-> %s\n",
1473 udp_address_to_string (NULL, (void *) address->address,
1474 address->address_length),
1475 GNUNET_a2s (s->sock_addr, s->addrlen));
1476 if ((address->address_length == sizeof (struct IPv4UdpAddress)) &&
1477 (s_addrlen == sizeof (struct sockaddr_in)))
1479 struct IPv4UdpAddress * u4 = NULL;
1480 u4 = (struct IPv4UdpAddress *) address->address;
1481 const struct sockaddr_in *s4 = (const struct sockaddr_in *) s->sock_addr;
1482 if ((0 == memcmp ((const void *) &u4->ipv4_addr,(const void *) &s4->sin_addr, sizeof (struct in_addr))) &&
1483 (u4->u4_port == s4->sin_port))
1490 if ((address->address_length == sizeof (struct IPv6UdpAddress)) &&
1491 (s_addrlen == sizeof (struct sockaddr_in6)))
1493 struct IPv6UdpAddress * u6 = NULL;
1494 u6 = (struct IPv6UdpAddress *) address->address;
1495 const struct sockaddr_in6 *s6 = (const struct sockaddr_in6 *) s->sock_addr;
1496 if ((0 == memcmp (&u6->ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr))) &&
1497 (u6->u6_port == s6->sin6_port))
1508 * Function obtain the network type for a session
1510 * @param cls closure ('struct Plugin*')
1511 * @param session the session
1512 * @return the network type in HBO or GNUNET_SYSERR
1514 static enum GNUNET_ATS_Network_Type
1515 udp_get_network (void *cls,
1516 struct Session *session)
1518 return ntohl (session->ats.value);
1523 * Creates a new outbound session the transport service will use to send data to the
1526 * @param cls the plugin
1527 * @param address the address
1528 * @return the session or NULL of max connections exceeded
1530 static struct Session *
1531 udp_plugin_lookup_session (void *cls,
1532 const struct GNUNET_HELLO_Address *address)
1534 struct Plugin * plugin = cls;
1535 struct IPv6UdpAddress * udp_a6;
1536 struct IPv4UdpAddress * udp_a4;
1538 GNUNET_assert (plugin != NULL);
1539 GNUNET_assert (address != NULL);
1542 if ((address->address == NULL) ||
1543 ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1544 (address->address_length != sizeof (struct IPv6UdpAddress))))
1546 LOG (GNUNET_ERROR_TYPE_WARNING,
1547 _("Trying to create session for address of unexpected length %u (should be %u or %u)\n"),
1548 address->address_length,
1549 sizeof (struct IPv4UdpAddress),
1550 sizeof (struct IPv6UdpAddress));
1554 if (address->address_length == sizeof (struct IPv4UdpAddress))
1556 if (plugin->sockv4 == NULL)
1558 udp_a4 = (struct IPv4UdpAddress *) address->address;
1559 if (udp_a4->u4_port == 0)
1563 if (address->address_length == sizeof (struct IPv6UdpAddress))
1565 if (plugin->sockv6 == NULL)
1567 udp_a6 = (struct IPv6UdpAddress *) address->address;
1568 if (udp_a6->u6_port == 0)
1572 /* check if session already exists */
1573 struct SessionCompareContext cctx;
1574 cctx.addr = address;
1576 LOG (GNUNET_ERROR_TYPE_DEBUG,
1577 "Looking for existing session for peer `%s' `%s' \n",
1578 GNUNET_i2s (&address->peer),
1579 udp_address_to_string(NULL, address->address, address->address_length));
1580 GNUNET_CONTAINER_multihashmap_get_multiple(plugin->sessions, &address->peer.hashPubKey, session_cmp_it, &cctx);
1581 if (cctx.res != NULL)
1583 LOG (GNUNET_ERROR_TYPE_DEBUG, "Found existing session %p\n", cctx.res);
1590 static struct Session *
1591 udp_plugin_create_session (void *cls,
1592 const struct GNUNET_HELLO_Address *address)
1596 s = create_session (plugin,
1599 address->address_length,
1602 return NULL; /* protocol not supported or address invalid */
1603 LOG (GNUNET_ERROR_TYPE_DEBUG,
1604 "Creating new session %p for peer `%s' address `%s'\n",
1606 GNUNET_i2s(&address->peer),
1607 udp_address_to_string(NULL,address->address,address->address_length));
1608 GNUNET_assert (GNUNET_OK ==
1609 GNUNET_CONTAINER_multihashmap_put (plugin->sessions,
1610 &s->target.hashPubKey,
1612 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1613 GNUNET_STATISTICS_set(plugin->env->stats,
1614 "# UDP, sessions active",
1615 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1622 * Creates a new outbound session the transport service will use to send data to the
1625 * @param cls the plugin
1626 * @param address the address
1627 * @return the session or NULL of max connections exceeded
1629 static struct Session *
1630 udp_plugin_get_session (void *cls,
1631 const struct GNUNET_HELLO_Address *address)
1635 if (NULL == address)
1640 if ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1641 (address->address_length != sizeof (struct IPv6UdpAddress)))
1644 /* otherwise create new */
1645 if (NULL != (s = udp_plugin_lookup_session (cls, address)))
1647 return udp_plugin_create_session (cls, address);
1652 enqueue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1654 if (plugin->bytes_in_buffer + udpw->msg_size > INT64_MAX)
1658 GNUNET_STATISTICS_update (plugin->env->stats,
1659 "# UDP, total, bytes in buffers",
1660 udpw->msg_size, GNUNET_NO);
1661 plugin->bytes_in_buffer += udpw->msg_size;
1663 GNUNET_STATISTICS_update (plugin->env->stats,
1664 "# UDP, total, msgs in buffers",
1666 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1667 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_queue_head,
1668 plugin->ipv4_queue_tail, udpw);
1669 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1670 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_queue_head,
1671 plugin->ipv6_queue_tail, udpw);
1677 * Fragment message was transmitted via UDP, let fragmentation know
1678 * to send the next fragment now.
1680 * @param cls the 'struct UDPMessageWrapper' of the fragment
1681 * @param target destination peer (ignored)
1682 * @param result GNUNET_OK on success (ignored)
1683 * @param payload bytes payload sent
1684 * @param physical bytes physical sent
1687 send_next_fragment (void *cls,
1688 const struct GNUNET_PeerIdentity *target,
1689 int result, size_t payload, size_t physical)
1691 struct UDP_MessageWrapper *udpw = cls;
1693 GNUNET_FRAGMENT_context_transmission_done (udpw->frag_ctx->frag);
1698 * Function that is called with messages created by the fragmentation
1699 * module. In the case of the 'proc' callback of the
1700 * GNUNET_FRAGMENT_context_create function, this function must
1701 * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
1703 * @param cls closure, the 'struct FragmentationContext'
1704 * @param msg the message that was created
1707 enqueue_fragment (void *cls, const struct GNUNET_MessageHeader *msg)
1709 struct UDP_FragmentationContext *frag_ctx = cls;
1710 struct Plugin *plugin = frag_ctx->plugin;
1711 struct UDP_MessageWrapper * udpw;
1712 size_t msg_len = ntohs (msg->size);
1714 LOG (GNUNET_ERROR_TYPE_DEBUG,
1715 "Enqueuing fragment with %u bytes\n", msg_len);
1716 frag_ctx->fragments_used ++;
1717 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msg_len);
1718 udpw->session = frag_ctx->session;
1719 udpw->msg_buf = (char *) &udpw[1];
1720 udpw->msg_size = msg_len;
1721 udpw->payload_size = msg_len; /*FIXME: minus fragment overhead */
1722 udpw->cont = &send_next_fragment;
1723 udpw->cont_cls = udpw;
1724 udpw->timeout = frag_ctx->timeout;
1725 udpw->frag_ctx = frag_ctx;
1726 udpw->msg_type = MSG_FRAGMENTED;
1727 memcpy (udpw->msg_buf, msg, msg_len);
1728 enqueue (plugin, udpw);
1729 schedule_select (plugin);
1734 * Function that can be used by the transport service to transmit
1735 * a message using the plugin. Note that in the case of a
1736 * peer disconnecting, the continuation MUST be called
1737 * prior to the disconnect notification itself. This function
1738 * will be called with this peer's HELLO message to initiate
1739 * a fresh connection to another peer.
1741 * @param cls closure
1742 * @param s which session must be used
1743 * @param msgbuf the message to transmit
1744 * @param msgbuf_size number of bytes in 'msgbuf'
1745 * @param priority how important is the message (most plugins will
1746 * ignore message priority and just FIFO)
1747 * @param to how long to wait at most for the transmission (does not
1748 * require plugins to discard the message after the timeout,
1749 * just advisory for the desired delay; most plugins will ignore
1751 * @param cont continuation to call once the message has
1752 * been transmitted (or if the transport is ready
1753 * for the next transmission call; or if the
1754 * peer disconnected...); can be NULL
1755 * @param cont_cls closure for cont
1756 * @return number of bytes used (on the physical network, with overheads);
1757 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1758 * and does NOT mean that the message was not transmitted (DV)
1761 udp_plugin_send (void *cls,
1763 const char *msgbuf, size_t msgbuf_size,
1764 unsigned int priority,
1765 struct GNUNET_TIME_Relative to,
1766 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1768 struct Plugin *plugin = cls;
1769 size_t udpmlen = msgbuf_size + sizeof (struct UDPMessage);
1770 struct UDP_FragmentationContext * frag_ctx;
1771 struct UDP_MessageWrapper * udpw;
1772 struct UDPMessage *udp;
1774 GNUNET_assert (plugin != NULL);
1775 GNUNET_assert (s != NULL);
1777 if ((s->addrlen == sizeof (struct sockaddr_in6)) && (plugin->sockv6 == NULL))
1778 return GNUNET_SYSERR;
1779 if ((s->addrlen == sizeof (struct sockaddr_in)) && (plugin->sockv4 == NULL))
1780 return GNUNET_SYSERR;
1781 if (udpmlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1784 return GNUNET_SYSERR;
1786 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains_value(plugin->sessions, &s->target.hashPubKey, s))
1789 return GNUNET_SYSERR;
1791 LOG (GNUNET_ERROR_TYPE_DEBUG,
1792 "UDP transmits %u-byte message to `%s' using address `%s'\n",
1794 GNUNET_i2s (&s->target),
1795 GNUNET_a2s(s->sock_addr, s->addrlen));
1799 udp = (struct UDPMessage *) mbuf;
1800 udp->header.size = htons (udpmlen);
1801 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
1802 udp->reserved = htonl (0);
1803 udp->sender = *plugin->env->my_identity;
1805 reschedule_session_timeout(s);
1806 if (udpmlen <= UDP_MTU)
1808 /* unfragmented message */
1809 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + udpmlen);
1811 udpw->msg_buf = (char *) &udpw[1];
1812 udpw->msg_size = udpmlen; /* message size with UDP overhead */
1813 udpw->payload_size = msgbuf_size; /* message size without UDP overhead */
1814 udpw->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1816 udpw->cont_cls = cont_cls;
1817 udpw->frag_ctx = NULL;
1818 udpw->msg_type = MSG_UNFRAGMENTED;
1819 memcpy (udpw->msg_buf, udp, sizeof (struct UDPMessage));
1820 memcpy (&udpw->msg_buf[sizeof (struct UDPMessage)], msgbuf, msgbuf_size);
1821 enqueue (plugin, udpw);
1823 GNUNET_STATISTICS_update (plugin->env->stats,
1824 "# UDP, unfragmented msgs, messages, attempt",
1826 GNUNET_STATISTICS_update (plugin->env->stats,
1827 "# UDP, unfragmented msgs, bytes payload, attempt",
1828 udpw->payload_size, GNUNET_NO);
1832 /* fragmented message */
1833 if (s->frag_ctx != NULL)
1834 return GNUNET_SYSERR;
1835 memcpy (&udp[1], msgbuf, msgbuf_size);
1836 frag_ctx = GNUNET_malloc (sizeof (struct UDP_FragmentationContext));
1837 frag_ctx->plugin = plugin;
1838 frag_ctx->session = s;
1839 frag_ctx->cont = cont;
1840 frag_ctx->cont_cls = cont_cls;
1841 frag_ctx->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1842 frag_ctx->payload_size = msgbuf_size; /* unfragmented message size without UDP overhead */
1843 frag_ctx->on_wire_size = 0; /* bytes with UDP and fragmentation overhead */
1844 frag_ctx->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
1847 s->last_expected_msg_delay,
1848 s->last_expected_ack_delay,
1852 s->frag_ctx = frag_ctx;
1853 GNUNET_STATISTICS_update (plugin->env->stats,
1854 "# UDP, fragmented msgs, messages, pending",
1856 GNUNET_STATISTICS_update (plugin->env->stats,
1857 "# UDP, fragmented msgs, messages, attempt",
1859 GNUNET_STATISTICS_update (plugin->env->stats,
1860 "# UDP, fragmented msgs, bytes payload, attempt",
1861 frag_ctx->payload_size, GNUNET_NO);
1863 schedule_select (plugin);
1869 * Our external IP address/port mapping has changed.
1871 * @param cls closure, the 'struct LocalAddrList'
1872 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1873 * the previous (now invalid) one
1874 * @param addr either the previous or the new public IP address
1875 * @param addrlen actual lenght of the address
1878 udp_nat_port_map_callback (void *cls, int add_remove,
1879 const struct sockaddr *addr, socklen_t addrlen)
1881 struct Plugin *plugin = cls;
1882 struct IPv4UdpAddress u4;
1883 struct IPv6UdpAddress u6;
1887 LOG (GNUNET_ERROR_TYPE_INFO,
1888 "NAT notification to %s address `%s'\n",
1889 (GNUNET_YES == add_remove) ? "add" : "remove",
1890 GNUNET_a2s (addr, addrlen));
1892 /* convert 'addr' to our internal format */
1893 switch (addr->sa_family)
1896 GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
1897 memset (&u4, 0, sizeof (u4));
1898 u4.options = htonl(myoptions);
1899 u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1900 u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
1901 if (0 == ((struct sockaddr_in *) addr)->sin_port)
1904 args = sizeof (struct IPv4UdpAddress);
1907 GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
1908 memset (&u4, 0, sizeof (u4));
1909 u6.options = htonl(myoptions);
1910 if (0 == ((struct sockaddr_in6 *) addr)->sin6_port)
1912 memcpy (&u6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
1913 sizeof (struct in6_addr));
1914 u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
1916 args = sizeof (struct IPv6UdpAddress);
1922 /* modify our published address list */
1923 plugin->env->notify_address (plugin->env->cls, add_remove, arg, args, "udp");
1929 * Message tokenizer has broken up an incomming message. Pass it on
1932 * @param cls the 'struct Plugin'
1933 * @param client the 'struct SourceInformation'
1934 * @param hdr the actual message
1937 process_inbound_tokenized_messages (void *cls, void *client,
1938 const struct GNUNET_MessageHeader *hdr)
1940 struct Plugin *plugin = cls;
1941 struct SourceInformation *si = client;
1942 struct GNUNET_TIME_Relative delay;
1944 GNUNET_assert (si->session != NULL);
1945 if (GNUNET_YES == si->session->in_destroy)
1948 GNUNET_break (ntohl(si->session->ats.value) != GNUNET_ATS_NET_UNSPECIFIED);
1949 delay = plugin->env->receive (plugin->env->cls,
1953 (GNUNET_YES == si->session->inbound) ? NULL : si->arg,
1954 (GNUNET_YES == si->session->inbound) ? 0 : si->args);
1956 plugin->env->update_address_metrics (plugin->env->cls,
1958 (GNUNET_YES == si->session->inbound) ? NULL : si->arg,
1959 (GNUNET_YES == si->session->inbound) ? 0 : si->args,
1961 &si->session->ats, 1);
1963 si->session->flow_delay_for_other_peer = delay;
1964 reschedule_session_timeout(si->session);
1970 * We've received a UDP Message. Process it (pass contents to main service).
1972 * @param plugin plugin context
1973 * @param msg the message
1974 * @param sender_addr sender address
1975 * @param sender_addr_len number of bytes in sender_addr
1978 process_udp_message (struct Plugin *plugin, const struct UDPMessage *msg,
1979 const struct sockaddr *sender_addr,
1980 socklen_t sender_addr_len)
1982 struct SourceInformation si;
1984 struct IPv4UdpAddress u4;
1985 struct IPv6UdpAddress u6;
1989 if (0 != ntohl (msg->reserved))
1991 GNUNET_break_op (0);
1994 if (ntohs (msg->header.size) <
1995 sizeof (struct GNUNET_MessageHeader) + sizeof (struct UDPMessage))
1997 GNUNET_break_op (0);
2001 /* convert address */
2002 switch (sender_addr->sa_family)
2005 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in));
2006 memset (&u4, 0, sizeof (u4));
2007 u6.options = htonl (0);
2008 u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
2009 u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
2014 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in6));
2015 memset (&u6, 0, sizeof (u6));
2016 u6.options = htonl (0);
2017 u6.ipv6_addr = ((struct sockaddr_in6 *) sender_addr)->sin6_addr;
2018 u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
2026 LOG (GNUNET_ERROR_TYPE_DEBUG,
2027 "Received message with %u bytes from peer `%s' at `%s'\n",
2028 (unsigned int) ntohs (msg->header.size), GNUNET_i2s (&msg->sender),
2029 GNUNET_a2s (sender_addr, sender_addr_len));
2031 struct GNUNET_HELLO_Address * address = GNUNET_HELLO_address_allocate(&msg->sender, "udp", arg, args);
2032 if (NULL == (s = udp_plugin_lookup_session (plugin, address)))
2034 s = udp_plugin_create_session(plugin, address);
2035 s->inbound = GNUNET_YES;
2036 plugin->env->session_start (NULL, &address->peer, PLUGIN_NAME,
2037 (GNUNET_YES == s->inbound) ? NULL : address->address,
2038 (GNUNET_YES == s->inbound) ? 0 : address->address_length,
2041 GNUNET_free (address);
2043 /* iterate over all embedded messages */
2045 si.sender = msg->sender;
2049 GNUNET_SERVER_mst_receive (plugin->mst, &si, (const char *) &msg[1],
2050 ntohs (msg->header.size) -
2051 sizeof (struct UDPMessage), GNUNET_YES, GNUNET_NO);
2053 if ( (0 == s->rc) && (GNUNET_YES == s->in_destroy))
2059 * Scan the heap for a receive context with the given address.
2061 * @param cls the 'struct FindReceiveContext'
2062 * @param node internal node of the heap
2063 * @param element value stored at the node (a 'struct ReceiveContext')
2064 * @param cost cost associated with the node
2065 * @return GNUNET_YES if we should continue to iterate,
2069 find_receive_context (void *cls, struct GNUNET_CONTAINER_HeapNode *node,
2070 void *element, GNUNET_CONTAINER_HeapCostType cost)
2072 struct FindReceiveContext *frc = cls;
2073 struct DefragContext *e = element;
2075 if ((frc->addr_len == e->addr_len) &&
2076 (0 == memcmp (frc->addr, e->src_addr, frc->addr_len)))
2086 * Process a defragmented message.
2088 * @param cls the 'struct ReceiveContext'
2089 * @param msg the message
2092 fragment_msg_proc (void *cls, const struct GNUNET_MessageHeader *msg)
2094 struct DefragContext *rc = cls;
2096 if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
2101 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2106 process_udp_message (rc->plugin, (const struct UDPMessage *) msg,
2107 rc->src_addr, rc->addr_len);
2111 struct LookupContext
2113 const struct sockaddr * addr;
2115 struct Session *res;
2122 lookup_session_by_addr_it (void *cls, const struct GNUNET_HashCode * key, void *value)
2124 struct LookupContext *l_ctx = cls;
2125 struct Session * s = value;
2127 if ((s->addrlen == l_ctx->addrlen) &&
2128 (0 == memcmp (s->sock_addr, l_ctx->addr, s->addrlen)))
2138 * Transmit an acknowledgement.
2140 * @param cls the 'struct ReceiveContext'
2141 * @param id message ID (unused)
2142 * @param msg ack to transmit
2145 ack_proc (void *cls, uint32_t id, const struct GNUNET_MessageHeader *msg)
2147 struct DefragContext *rc = cls;
2148 size_t msize = sizeof (struct UDP_ACK_Message) + ntohs (msg->size);
2149 struct UDP_ACK_Message *udp_ack;
2151 struct UDP_MessageWrapper *udpw;
2153 struct LookupContext l_ctx;
2155 l_ctx.addr = rc->src_addr;
2156 l_ctx.addrlen = rc->addr_len;
2158 GNUNET_CONTAINER_multihashmap_iterate (rc->plugin->sessions,
2159 &lookup_session_by_addr_it,
2166 if (s->flow_delay_for_other_peer.rel_value_us <= UINT32_MAX)
2167 delay = s->flow_delay_for_other_peer.rel_value_us;
2169 LOG (GNUNET_ERROR_TYPE_DEBUG,
2170 "Sending ACK to `%s' including delay of %s\n",
2171 GNUNET_a2s (rc->src_addr,
2172 (rc->src_addr->sa_family ==
2173 AF_INET) ? sizeof (struct sockaddr_in) : sizeof (struct
2175 GNUNET_STRINGS_relative_time_to_string (s->flow_delay_for_other_peer,
2177 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msize);
2178 udpw->msg_size = msize;
2179 udpw->payload_size = 0;
2181 udpw->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
2182 udpw->msg_buf = (char *)&udpw[1];
2183 udpw->msg_type = MSG_ACK;
2184 udp_ack = (struct UDP_ACK_Message *) udpw->msg_buf;
2185 udp_ack->header.size = htons ((uint16_t) msize);
2186 udp_ack->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
2187 udp_ack->delay = htonl (delay);
2188 udp_ack->sender = *rc->plugin->env->my_identity;
2189 memcpy (&udp_ack[1], msg, ntohs (msg->size));
2190 enqueue (rc->plugin, udpw);
2195 read_process_msg (struct Plugin *plugin,
2196 const struct GNUNET_MessageHeader *msg,
2200 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2202 GNUNET_break_op (0);
2205 process_udp_message (plugin, (const struct UDPMessage *) msg,
2206 (const struct sockaddr *) addr, fromlen);
2211 read_process_ack (struct Plugin *plugin,
2212 const struct GNUNET_MessageHeader *msg,
2216 const struct GNUNET_MessageHeader *ack;
2217 const struct UDP_ACK_Message *udp_ack;
2218 struct LookupContext l_ctx;
2220 struct GNUNET_TIME_Relative flow_delay;
2222 if (ntohs (msg->size) <
2223 sizeof (struct UDP_ACK_Message) + sizeof (struct GNUNET_MessageHeader))
2225 GNUNET_break_op (0);
2228 udp_ack = (const struct UDP_ACK_Message *) msg;
2229 l_ctx.addr = (const struct sockaddr *) addr;
2230 l_ctx.addrlen = fromlen;
2232 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions,
2233 &lookup_session_by_addr_it,
2237 if ((NULL == s) || (NULL == s->frag_ctx))
2242 flow_delay.rel_value_us = (uint64_t) ntohl (udp_ack->delay);
2243 LOG (GNUNET_ERROR_TYPE_DEBUG,
2244 "We received a sending delay of %s\n",
2245 GNUNET_STRINGS_relative_time_to_string (flow_delay,
2247 s->flow_delay_from_other_peer =
2248 GNUNET_TIME_relative_to_absolute (flow_delay);
2250 ack = (const struct GNUNET_MessageHeader *) &udp_ack[1];
2251 if (ntohs (ack->size) !=
2252 ntohs (msg->size) - sizeof (struct UDP_ACK_Message))
2254 GNUNET_break_op (0);
2258 if (0 != memcmp (&l_ctx.res->target, &udp_ack->sender, sizeof (struct GNUNET_PeerIdentity)))
2260 if (GNUNET_OK != GNUNET_FRAGMENT_process_ack (s->frag_ctx->frag, ack))
2262 LOG (GNUNET_ERROR_TYPE_DEBUG,
2263 "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
2264 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2265 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2266 /* Expect more ACKs to arrive */
2270 LOG (GNUNET_ERROR_TYPE_DEBUG,
2271 "Message full ACK'ed\n",
2272 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2273 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2275 /* Remove fragmented message after successful sending */
2276 fragmented_message_done (s->frag_ctx, GNUNET_OK);
2281 read_process_fragment (struct Plugin *plugin,
2282 const struct GNUNET_MessageHeader *msg,
2286 struct DefragContext *d_ctx;
2287 struct GNUNET_TIME_Absolute now;
2288 struct FindReceiveContext frc;
2291 frc.addr = (const struct sockaddr *) addr;
2292 frc.addr_len = fromlen;
2294 LOG (GNUNET_ERROR_TYPE_DEBUG, "UDP processes %u-byte fragment from `%s'\n",
2295 (unsigned int) ntohs (msg->size),
2296 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2297 /* Lookup existing receive context for this address */
2298 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
2299 &find_receive_context,
2301 now = GNUNET_TIME_absolute_get ();
2306 /* Create a new defragmentation context */
2307 d_ctx = GNUNET_malloc (sizeof (struct DefragContext) + fromlen);
2308 memcpy (&d_ctx[1], addr, fromlen);
2309 d_ctx->src_addr = (const struct sockaddr *) &d_ctx[1];
2310 d_ctx->addr_len = fromlen;
2311 d_ctx->plugin = plugin;
2313 GNUNET_DEFRAGMENT_context_create (plugin->env->stats, UDP_MTU,
2314 UDP_MAX_MESSAGES_IN_DEFRAG, d_ctx,
2315 &fragment_msg_proc, &ack_proc);
2317 GNUNET_CONTAINER_heap_insert (plugin->defrag_ctxs, d_ctx,
2318 (GNUNET_CONTAINER_HeapCostType)
2320 LOG (GNUNET_ERROR_TYPE_DEBUG,
2321 "Created new defragmentation context for %u-byte fragment from `%s'\n",
2322 (unsigned int) ntohs (msg->size),
2323 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2327 LOG (GNUNET_ERROR_TYPE_DEBUG,
2328 "Found existing defragmentation context for %u-byte fragment from `%s'\n",
2329 (unsigned int) ntohs (msg->size),
2330 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2333 if (GNUNET_OK == GNUNET_DEFRAGMENT_process_fragment (d_ctx->defrag, msg))
2335 /* keep this 'rc' from expiring */
2336 GNUNET_CONTAINER_heap_update_cost (plugin->defrag_ctxs, d_ctx->hnode,
2337 (GNUNET_CONTAINER_HeapCostType)
2340 if (GNUNET_CONTAINER_heap_get_size (plugin->defrag_ctxs) >
2341 UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
2343 /* remove 'rc' that was inactive the longest */
2344 d_ctx = GNUNET_CONTAINER_heap_remove_root (plugin->defrag_ctxs);
2345 GNUNET_assert (NULL != d_ctx);
2346 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
2347 GNUNET_free (d_ctx);
2353 * Read and process a message from the given socket.
2355 * @param plugin the overall plugin
2356 * @param rsock socket to read from
2359 udp_select_read (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *rsock)
2363 char buf[65536] GNUNET_ALIGN;
2365 const struct GNUNET_MessageHeader *msg;
2367 fromlen = sizeof (addr);
2368 memset (&addr, 0, sizeof (addr));
2369 size = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof (buf),
2370 (struct sockaddr *) &addr, &fromlen);
2372 /* On SOCK_DGRAM UDP sockets recvfrom might fail with a
2373 * WSAECONNRESET error to indicate that previous sendto() (yes, sendto!)
2374 * on this socket has failed.
2376 * WSAECONNRESET - The virtual circuit was reset by the remote side
2377 * executing a hard or abortive close. The application should close
2378 * the socket; it is no longer usable. On a UDP-datagram socket this
2379 * error indicates a previous send operation resulted in an ICMP Port
2380 * Unreachable message.
2382 if ( (-1 == size) && (ECONNRESET == errno) )
2387 LOG (GNUNET_ERROR_TYPE_DEBUG,
2388 "UDP failed to receive data: %s\n", STRERROR (errno));
2389 /* Connection failure or something. Not a protocol violation. */
2392 if (size < sizeof (struct GNUNET_MessageHeader))
2394 LOG (GNUNET_ERROR_TYPE_WARNING,
2395 "UDP got %u bytes, which is not enough for a GNUnet message header\n",
2396 (unsigned int) size);
2397 /* _MAY_ be a connection failure (got partial message) */
2398 /* But it _MAY_ also be that the other side uses non-GNUnet protocol. */
2399 GNUNET_break_op (0);
2402 msg = (const struct GNUNET_MessageHeader *) buf;
2404 LOG (GNUNET_ERROR_TYPE_DEBUG,
2405 "UDP received %u-byte message from `%s' type %i\n", (unsigned int) size,
2406 GNUNET_a2s ((const struct sockaddr *) addr, fromlen), ntohs (msg->type));
2408 if (size != ntohs (msg->size))
2410 GNUNET_break_op (0);
2414 GNUNET_STATISTICS_update (plugin->env->stats,
2415 "# UDP, total, bytes, received",
2418 switch (ntohs (msg->type))
2420 case GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON:
2421 udp_broadcast_receive (plugin, &buf, size, addr, fromlen);
2424 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
2425 read_process_msg (plugin, msg, addr, fromlen);
2428 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
2429 read_process_ack (plugin, msg, addr, fromlen);
2432 case GNUNET_MESSAGE_TYPE_FRAGMENT:
2433 read_process_fragment (plugin, msg, addr, fromlen);
2437 GNUNET_break_op (0);
2443 static struct UDP_MessageWrapper *
2444 remove_timeout_messages_and_select (struct UDP_MessageWrapper *head,
2445 struct GNUNET_NETWORK_Handle *sock)
2447 struct UDP_MessageWrapper *udpw = NULL;
2448 struct GNUNET_TIME_Relative remaining;
2451 while (udpw != NULL)
2453 /* Find messages with timeout */
2454 remaining = GNUNET_TIME_absolute_get_remaining (udpw->timeout);
2455 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2457 /* Message timed out */
2458 switch (udpw->msg_type) {
2459 case MSG_UNFRAGMENTED:
2460 GNUNET_STATISTICS_update (plugin->env->stats,
2461 "# UDP, total, bytes, sent, timeout",
2462 udpw->msg_size, GNUNET_NO);
2463 GNUNET_STATISTICS_update (plugin->env->stats,
2464 "# UDP, total, messages, sent, timeout",
2466 GNUNET_STATISTICS_update (plugin->env->stats,
2467 "# UDP, unfragmented msgs, messages, sent, timeout",
2469 GNUNET_STATISTICS_update (plugin->env->stats,
2470 "# UDP, unfragmented msgs, bytes, sent, timeout",
2471 udpw->payload_size, GNUNET_NO);
2472 /* Not fragmented message */
2473 LOG (GNUNET_ERROR_TYPE_DEBUG,
2474 "Message for peer `%s' with size %u timed out\n",
2475 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2476 call_continuation (udpw, GNUNET_SYSERR);
2477 /* Remove message */
2478 dequeue (plugin, udpw);
2481 case MSG_FRAGMENTED:
2482 /* Fragmented message */
2483 GNUNET_STATISTICS_update (plugin->env->stats,
2484 "# UDP, total, bytes, sent, timeout",
2485 udpw->frag_ctx->on_wire_size, GNUNET_NO);
2486 GNUNET_STATISTICS_update (plugin->env->stats,
2487 "# UDP, total, messages, sent, timeout",
2489 call_continuation (udpw, GNUNET_SYSERR);
2490 LOG (GNUNET_ERROR_TYPE_DEBUG,
2491 "Fragment for message for peer `%s' with size %u timed out\n",
2492 GNUNET_i2s(&udpw->session->target), udpw->frag_ctx->payload_size);
2495 GNUNET_STATISTICS_update (plugin->env->stats,
2496 "# UDP, fragmented msgs, messages, sent, timeout",
2498 GNUNET_STATISTICS_update (plugin->env->stats,
2499 "# UDP, fragmented msgs, bytes, sent, timeout",
2500 udpw->frag_ctx->payload_size, GNUNET_NO);
2501 /* Remove fragmented message due to timeout */
2502 fragmented_message_done (udpw->frag_ctx, GNUNET_SYSERR);
2505 GNUNET_STATISTICS_update (plugin->env->stats,
2506 "# UDP, total, bytes, sent, timeout",
2507 udpw->msg_size, GNUNET_NO);
2508 GNUNET_STATISTICS_update (plugin->env->stats,
2509 "# UDP, total, messages, sent, timeout",
2511 LOG (GNUNET_ERROR_TYPE_DEBUG,
2512 "ACK Message for peer `%s' with size %u timed out\n",
2513 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2514 call_continuation (udpw, GNUNET_SYSERR);
2515 dequeue (plugin, udpw);
2521 if (sock == plugin->sockv4)
2522 udpw = plugin->ipv4_queue_head;
2523 else if (sock == plugin->sockv6)
2524 udpw = plugin->ipv6_queue_head;
2527 GNUNET_break (0); /* should never happen */
2530 GNUNET_STATISTICS_update (plugin->env->stats,
2531 "# messages dismissed due to timeout",
2536 /* Message did not time out, check flow delay */
2537 remaining = GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer);
2538 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2540 /* this message is not delayed */
2541 LOG (GNUNET_ERROR_TYPE_DEBUG,
2542 "Message for peer `%s' (%u bytes) is not delayed \n",
2543 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2544 break; /* Found message to send, break */
2548 /* Message is delayed, try next */
2549 LOG (GNUNET_ERROR_TYPE_DEBUG,
2550 "Message for peer `%s' (%u bytes) is delayed for %s\n",
2551 GNUNET_i2s(&udpw->session->target), udpw->payload_size,
2552 GNUNET_STRINGS_relative_time_to_string (remaining,
2563 analyze_send_error (struct Plugin *plugin,
2564 const struct sockaddr * sa,
2568 static int network_down_error;
2569 struct GNUNET_ATS_Information type;
2571 type = plugin->env->get_address_type (plugin->env->cls,sa, slen);
2572 if (((GNUNET_ATS_NET_LAN == ntohl(type.value)) || (GNUNET_ATS_NET_WAN == ntohl(type.value))) &&
2573 ((ENETUNREACH == errno) || (ENETDOWN == errno)))
2575 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in)))
2577 /* IPv4: "Network unreachable" or "Network down"
2579 * This indicates we do not have connectivity
2581 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2582 _("UDP could not transmit message to `%s': "
2583 "Network seems down, please check your network configuration\n"),
2584 GNUNET_a2s (sa, slen));
2586 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in6)))
2588 /* IPv6: "Network unreachable" or "Network down"
2590 * This indicates that this system is IPv6 enabled, but does not
2591 * have a valid global IPv6 address assigned or we do not have
2595 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2596 _("UDP could not transmit message to `%s': "
2597 "Please check your network configuration and disable IPv6 if your "
2598 "connection does not have a global IPv6 address\n"),
2599 GNUNET_a2s (sa, slen));
2604 LOG (GNUNET_ERROR_TYPE_WARNING,
2605 "UDP could not transmit message to `%s': `%s'\n",
2606 GNUNET_a2s (sa, slen), STRERROR (error));
2612 udp_select_send (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *sock)
2614 const struct sockaddr * sa;
2618 struct UDP_MessageWrapper *udpw = NULL;
2620 /* Find message to send */
2621 udpw = remove_timeout_messages_and_select ((sock == plugin->sockv4) ? plugin->ipv4_queue_head : plugin->ipv6_queue_head,
2624 return 0; /* No message to send */
2626 sa = udpw->session->sock_addr;
2627 slen = udpw->session->addrlen;
2629 sent = GNUNET_NETWORK_socket_sendto (sock, udpw->msg_buf, udpw->msg_size, sa, slen);
2631 if (GNUNET_SYSERR == sent)
2634 analyze_send_error (plugin, sa, slen, errno);
2635 call_continuation(udpw, GNUNET_SYSERR);
2636 GNUNET_STATISTICS_update (plugin->env->stats,
2637 "# UDP, total, bytes, sent, failure",
2639 GNUNET_STATISTICS_update (plugin->env->stats,
2640 "# UDP, total, messages, sent, failure",
2646 LOG (GNUNET_ERROR_TYPE_DEBUG,
2647 "UDP transmitted %u-byte message to `%s' `%s' (%d: %s)\n",
2648 (unsigned int) (udpw->msg_size), GNUNET_i2s(&udpw->session->target) ,GNUNET_a2s (sa, slen), (int) sent,
2649 (sent < 0) ? STRERROR (errno) : "ok");
2650 GNUNET_STATISTICS_update (plugin->env->stats,
2651 "# UDP, total, bytes, sent, success",
2653 GNUNET_STATISTICS_update (plugin->env->stats,
2654 "# UDP, total, messages, sent, success",
2656 if (NULL != udpw->frag_ctx)
2657 udpw->frag_ctx->on_wire_size += udpw->msg_size;
2658 call_continuation (udpw, GNUNET_OK);
2660 dequeue (plugin, udpw);
2669 * We have been notified that our readset has something to read. We don't
2670 * know which socket needs to be read, so we have to check each one
2671 * Then reschedule this function to be called again once more is available.
2673 * @param cls the plugin handle
2674 * @param tc the scheduling context (for rescheduling this function again)
2677 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2679 struct Plugin *plugin = cls;
2681 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
2682 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2684 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
2685 (NULL != plugin->sockv4) &&
2686 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv4)) )
2687 udp_select_read (plugin, plugin->sockv4);
2688 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2689 (NULL != plugin->sockv4) &&
2690 (NULL != plugin->ipv4_queue_head) &&
2691 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv4)) )
2692 udp_select_send (plugin, plugin->sockv4);
2693 schedule_select (plugin);
2698 * We have been notified that our readset has something to read. We don't
2699 * know which socket needs to be read, so we have to check each one
2700 * Then reschedule this function to be called again once more is available.
2702 * @param cls the plugin handle
2703 * @param tc the scheduling context (for rescheduling this function again)
2706 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2708 struct Plugin *plugin = cls;
2710 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2711 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2713 if ( ((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0) &&
2714 (NULL != plugin->sockv6) &&
2715 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv6)) )
2716 udp_select_read (plugin, plugin->sockv6);
2717 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2718 (NULL != plugin->sockv6) && (plugin->ipv6_queue_head != NULL) &&
2719 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv6)) )
2720 udp_select_send (plugin, plugin->sockv6);
2721 schedule_select (plugin);
2727 * @return number of sockets that were successfully bound
2730 setup_sockets (struct Plugin *plugin,
2731 const struct sockaddr_in6 *bind_v6,
2732 const struct sockaddr_in *bind_v4)
2735 int sockets_created = 0;
2736 struct sockaddr_in6 serverAddrv6;
2737 struct sockaddr_in serverAddrv4;
2738 struct sockaddr *serverAddr;
2739 struct sockaddr *addrs[2];
2740 socklen_t addrlens[2];
2744 /* Create IPv6 socket */
2746 if (plugin->enable_ipv6 == GNUNET_YES)
2748 plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
2749 if (NULL == plugin->sockv6)
2751 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2752 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv6 since it is not supported on this system!\n");
2753 plugin->enable_ipv6 = GNUNET_NO;
2757 memset (&serverAddrv6, '\0', sizeof (struct sockaddr_in6));
2758 #if HAVE_SOCKADDR_IN_SIN_LEN
2759 serverAddrv6.sin6_len = sizeof (struct sockaddr_in6);
2761 serverAddrv6.sin6_family = AF_INET6;
2762 if (NULL != bind_v6)
2763 serverAddrv6.sin6_addr = bind_v6->sin6_addr;
2765 serverAddrv6.sin6_addr = in6addr_any;
2767 if (0 == plugin->port) /* autodetect */
2768 serverAddrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2770 serverAddrv6.sin6_port = htons (plugin->port);
2771 addrlen = sizeof (struct sockaddr_in6);
2772 serverAddr = (struct sockaddr *) &serverAddrv6;
2777 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv6 `%s'\n",
2778 GNUNET_a2s (serverAddr, addrlen));
2780 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv6,
2781 serverAddr, addrlen, 0))
2784 if (0 != plugin->port)
2786 tries = 10; /* fail */
2787 break; /* bind failed on specific port */
2790 serverAddrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2795 GNUNET_NETWORK_socket_close (plugin->sockv6);
2796 plugin->enable_ipv6 = GNUNET_NO;
2797 plugin->sockv6 = NULL;
2800 if (plugin->sockv6 != NULL)
2802 LOG (GNUNET_ERROR_TYPE_DEBUG,
2803 "IPv6 socket created on port %s\n",
2804 GNUNET_a2s (serverAddr, addrlen));
2805 addrs[sockets_created] = (struct sockaddr *) &serverAddrv6;
2806 addrlens[sockets_created] = sizeof (struct sockaddr_in6);
2811 LOG (GNUNET_ERROR_TYPE_ERROR,
2812 "Failed to bind UDP socket to %s: %s\n",
2813 GNUNET_a2s (serverAddr, addrlen),
2819 /* Create IPv4 socket */
2821 plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
2822 if (NULL == plugin->sockv4)
2824 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2825 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv4 since it is not supported on this system!\n");
2826 plugin->enable_ipv4 = GNUNET_NO;
2830 memset (&serverAddrv4, '\0', sizeof (struct sockaddr_in));
2831 #if HAVE_SOCKADDR_IN_SIN_LEN
2832 serverAddrv4.sin_len = sizeof (struct sockaddr_in);
2834 serverAddrv4.sin_family = AF_INET;
2835 if (NULL != bind_v4)
2836 serverAddrv4.sin_addr = bind_v4->sin_addr;
2838 serverAddrv4.sin_addr.s_addr = INADDR_ANY;
2840 if (0 == plugin->port)
2842 serverAddrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2844 serverAddrv4.sin_port = htons (plugin->port);
2847 addrlen = sizeof (struct sockaddr_in);
2848 serverAddr = (struct sockaddr *) &serverAddrv4;
2853 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv4 `%s'\n",
2854 GNUNET_a2s (serverAddr, addrlen));
2857 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv4,
2858 serverAddr, addrlen, 0))
2861 if (0 != plugin->port)
2863 tries = 10; /* fail */
2864 break; /* bind failed on specific port */
2868 serverAddrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2874 GNUNET_NETWORK_socket_close (plugin->sockv4);
2875 plugin->enable_ipv4 = GNUNET_NO;
2876 plugin->sockv4 = NULL;
2879 if (plugin->sockv4 != NULL)
2881 LOG (GNUNET_ERROR_TYPE_DEBUG,
2882 "IPv4 socket created on port %s\n", GNUNET_a2s (serverAddr, addrlen));
2883 addrs[sockets_created] = (struct sockaddr *) &serverAddrv4;
2884 addrlens[sockets_created] = sizeof (struct sockaddr_in);
2889 LOG (GNUNET_ERROR_TYPE_ERROR,
2890 "Failed to bind UDP socket to %s: %s\n",
2891 GNUNET_a2s (serverAddr, addrlen), STRERROR (eno));
2895 if (0 == sockets_created)
2897 LOG (GNUNET_ERROR_TYPE_WARNING, _("Failed to open UDP sockets\n"));
2898 return 0; /* No sockets created, return */
2901 /* Create file descriptors */
2902 if (plugin->enable_ipv4 == GNUNET_YES)
2904 plugin->rs_v4 = GNUNET_NETWORK_fdset_create ();
2905 plugin->ws_v4 = GNUNET_NETWORK_fdset_create ();
2906 GNUNET_NETWORK_fdset_zero (plugin->rs_v4);
2907 GNUNET_NETWORK_fdset_zero (plugin->ws_v4);
2908 if (NULL != plugin->sockv4)
2910 GNUNET_NETWORK_fdset_set (plugin->rs_v4, plugin->sockv4);
2911 GNUNET_NETWORK_fdset_set (plugin->ws_v4, plugin->sockv4);
2915 if (plugin->enable_ipv6 == GNUNET_YES)
2917 plugin->rs_v6 = GNUNET_NETWORK_fdset_create ();
2918 plugin->ws_v6 = GNUNET_NETWORK_fdset_create ();
2919 GNUNET_NETWORK_fdset_zero (plugin->rs_v6);
2920 GNUNET_NETWORK_fdset_zero (plugin->ws_v6);
2921 if (NULL != plugin->sockv6)
2923 GNUNET_NETWORK_fdset_set (plugin->rs_v6, plugin->sockv6);
2924 GNUNET_NETWORK_fdset_set (plugin->ws_v6, plugin->sockv6);
2928 schedule_select (plugin);
2929 plugin->nat = GNUNET_NAT_register (plugin->env->cfg,
2930 GNUNET_NO, plugin->port,
2932 (const struct sockaddr **) addrs, addrlens,
2933 &udp_nat_port_map_callback, NULL, plugin);
2935 return sockets_created;
2940 * The exported method. Makes the core api available via a global and
2941 * returns the udp transport API.
2943 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
2944 * @return our 'struct GNUNET_TRANSPORT_PluginFunctions'
2947 libgnunet_plugin_transport_udp_init (void *cls)
2949 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2950 struct GNUNET_TRANSPORT_PluginFunctions *api;
2952 unsigned long long port;
2953 unsigned long long aport;
2954 unsigned long long broadcast;
2955 unsigned long long udp_max_bps;
2956 unsigned long long enable_v6;
2957 char * bind4_address;
2958 char * bind6_address;
2959 char * fancy_interval;
2960 struct GNUNET_TIME_Relative interval;
2961 struct sockaddr_in serverAddrv4;
2962 struct sockaddr_in6 serverAddrv6;
2967 if (NULL == env->receive)
2969 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
2970 initialze the plugin or the API */
2971 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
2973 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
2974 api->address_to_string = &udp_address_to_string;
2975 api->string_to_address = &udp_string_to_address;
2979 GNUNET_assert (NULL != env->stats);
2981 /* Get port number: port == 0 : autodetect a port,
2982 * > 0 : use this port,
2983 * not given : 2086 default */
2985 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp", "PORT",
2989 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
2990 "ADVERTISED_PORT", &aport))
2994 LOG (GNUNET_ERROR_TYPE_WARNING,
2995 _("Given `%s' option is out of range: %llu > %u\n"), "PORT", port,
3002 GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "nat",
3004 enable_v6 = GNUNET_NO;
3006 enable_v6 = GNUNET_YES;
3009 have_bind4 = GNUNET_NO;
3010 memset (&serverAddrv4, 0, sizeof (serverAddrv4));
3012 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3013 "BINDTO", &bind4_address))
3015 LOG (GNUNET_ERROR_TYPE_DEBUG,
3016 "Binding udp plugin to specific address: `%s'\n",
3018 if (1 != inet_pton (AF_INET, bind4_address, &serverAddrv4.sin_addr))
3020 GNUNET_free (bind4_address);
3023 have_bind4 = GNUNET_YES;
3025 GNUNET_free_non_null (bind4_address);
3026 have_bind6 = GNUNET_NO;
3027 memset (&serverAddrv6, 0, sizeof (serverAddrv6));
3029 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3030 "BINDTO6", &bind6_address))
3032 LOG (GNUNET_ERROR_TYPE_DEBUG,
3033 "Binding udp plugin to specific address: `%s'\n",
3036 inet_pton (AF_INET6, bind6_address, &serverAddrv6.sin6_addr))
3038 LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid IPv6 address: `%s'\n"),
3040 GNUNET_free (bind6_address);
3043 have_bind6 = GNUNET_YES;
3045 GNUNET_free_non_null (bind6_address);
3047 /* Initialize my flags */
3050 /* Enable neighbour discovery */
3051 broadcast = GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "transport-udp",
3053 if (broadcast == GNUNET_SYSERR)
3054 broadcast = GNUNET_NO;
3056 if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3057 "BROADCAST_INTERVAL", &fancy_interval))
3059 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
3063 if (GNUNET_SYSERR == GNUNET_STRINGS_fancy_time_to_relative(fancy_interval, &interval))
3065 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30);
3067 GNUNET_free (fancy_interval);
3070 /* Maximum datarate */
3071 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3072 "MAX_BPS", &udp_max_bps))
3074 udp_max_bps = 1024 * 1024 * 50; /* 50 MB/s == infinity for practical purposes */
3077 p = GNUNET_malloc (sizeof (struct Plugin));
3080 p->broadcast_interval = interval;
3081 p->enable_ipv6 = enable_v6;
3082 p->enable_ipv4 = GNUNET_YES; /* default */
3084 p->sessions = GNUNET_CONTAINER_multihashmap_create (10, GNUNET_NO);
3085 p->defrag_ctxs = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
3086 p->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages, p);
3087 GNUNET_BANDWIDTH_tracker_init (&p->tracker,
3088 GNUNET_BANDWIDTH_value_init ((uint32_t)udp_max_bps), 30);
3091 LOG (GNUNET_ERROR_TYPE_DEBUG, "Setting up sockets\n");
3092 res = setup_sockets (p, (GNUNET_YES == have_bind6) ? &serverAddrv6 : NULL,
3093 (GNUNET_YES == have_bind4) ? &serverAddrv4 : NULL);
3094 if ((res == 0) || ((p->sockv4 == NULL) && (p->sockv6 == NULL)))
3096 LOG (GNUNET_ERROR_TYPE_ERROR,
3097 _("Failed to create network sockets, plugin failed\n"));
3098 GNUNET_CONTAINER_multihashmap_destroy (p->sessions);
3099 GNUNET_CONTAINER_heap_destroy (p->defrag_ctxs);
3100 GNUNET_SERVER_mst_destroy (p->mst);
3104 else if (broadcast == GNUNET_YES)
3106 LOG (GNUNET_ERROR_TYPE_DEBUG, "Starting broadcasting\n");
3107 setup_broadcast (p, &serverAddrv6, &serverAddrv4);
3110 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
3113 api->disconnect = &udp_disconnect;
3114 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3115 api->address_to_string = &udp_address_to_string;
3116 api->string_to_address = &udp_string_to_address;
3117 api->check_address = &udp_plugin_check_address;
3118 api->get_session = &udp_plugin_get_session;
3119 api->send = &udp_plugin_send;
3120 api->get_network = &udp_get_network;
3127 heap_cleanup_iterator (void *cls,
3128 struct GNUNET_CONTAINER_HeapNode *
3129 node, void *element,
3130 GNUNET_CONTAINER_HeapCostType
3133 struct DefragContext * d_ctx = element;
3135 GNUNET_CONTAINER_heap_remove_node (node);
3136 GNUNET_DEFRAGMENT_context_destroy(d_ctx->defrag);
3137 GNUNET_free (d_ctx);
3144 * The exported method. Makes the core api available via a global and
3145 * returns the udp transport API.
3147 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
3151 libgnunet_plugin_transport_udp_done (void *cls)
3153 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
3154 struct Plugin *plugin = api->cls;
3155 struct PrettyPrinterContext *cur;
3156 struct PrettyPrinterContext *next;
3164 stop_broadcast (plugin);
3165 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
3167 GNUNET_SCHEDULER_cancel (plugin->select_task);
3168 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
3170 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK)
3172 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
3173 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
3176 /* Closing sockets */
3177 if (GNUNET_YES ==plugin->enable_ipv4)
3179 if (plugin->sockv4 != NULL)
3181 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
3182 plugin->sockv4 = NULL;
3184 GNUNET_NETWORK_fdset_destroy (plugin->rs_v4);
3185 GNUNET_NETWORK_fdset_destroy (plugin->ws_v4);
3187 if (GNUNET_YES ==plugin->enable_ipv6)
3189 if (plugin->sockv6 != NULL)
3191 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
3192 plugin->sockv6 = NULL;
3194 GNUNET_NETWORK_fdset_destroy (plugin->rs_v6);
3195 GNUNET_NETWORK_fdset_destroy (plugin->ws_v6);
3198 if (NULL != plugin->nat)
3199 GNUNET_NAT_unregister (plugin->nat);
3201 if (plugin->defrag_ctxs != NULL)
3203 GNUNET_CONTAINER_heap_iterate(plugin->defrag_ctxs,
3204 heap_cleanup_iterator, NULL);
3205 GNUNET_CONTAINER_heap_destroy(plugin->defrag_ctxs);
3206 plugin->defrag_ctxs = NULL;
3208 if (plugin->mst != NULL)
3210 GNUNET_SERVER_mst_destroy(plugin->mst);
3214 /* Clean up leftover messages */
3215 struct UDP_MessageWrapper * udpw;
3216 udpw = plugin->ipv4_queue_head;
3217 while (udpw != NULL)
3219 struct UDP_MessageWrapper *tmp = udpw->next;
3220 dequeue (plugin, udpw);
3221 call_continuation(udpw, GNUNET_SYSERR);
3226 udpw = plugin->ipv6_queue_head;
3227 while (udpw != NULL)
3229 struct UDP_MessageWrapper *tmp = udpw->next;
3230 dequeue (plugin, udpw);
3231 call_continuation(udpw, GNUNET_SYSERR);
3237 /* Clean up sessions */
3238 LOG (GNUNET_ERROR_TYPE_DEBUG,
3239 "Cleaning up sessions\n");
3240 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions, &disconnect_and_free_it, plugin);
3241 GNUNET_CONTAINER_multihashmap_destroy (plugin->sessions);
3243 next = ppc_dll_head;
3244 for (cur = next; NULL != cur; cur = next)
3247 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, cur);
3248 GNUNET_RESOLVER_request_cancel (cur->resolver_handle);
3249 GNUNET_SCHEDULER_cancel (cur->timeout_task);
3255 GNUNET_free (plugin);
3258 struct Allocation *allocation;
3259 while (NULL != ahead)
3262 GNUNET_CONTAINER_DLL_remove (ahead, atail, allocation);
3263 GNUNET_free (allocation);
3265 struct Allocator *allocator;
3266 while (NULL != aehead)
3269 GNUNET_CONTAINER_DLL_remove (aehead, aetail, allocator);
3270 GNUNET_free (allocator);
3277 /* end of plugin_transport_udp.c */