2 This file is part of GNUnet
3 (C) 2010-2014 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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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 UDP_SESSION_TIME_OUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 60)
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;
78 * Closure for #append_port().
80 struct PrettyPrinterContext
85 struct PrettyPrinterContext *next;
90 struct PrettyPrinterContext *prev;
95 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
100 struct GNUNET_RESOLVER_RequestHandle *resolver_handle;
103 * Function to call with the result.
105 GNUNET_TRANSPORT_AddressStringCallback asc;
113 * Port to add after the IP address.
133 * Which peer is this session for?
135 struct GNUNET_PeerIdentity target;
138 * Plugin this session belongs to.
140 struct Plugin *plugin;
143 * Context for dealing with fragments.
145 struct UDP_FragmentationContext *frag_ctx;
148 * Desired delay for next sending we send to other peer
150 struct GNUNET_TIME_Relative flow_delay_for_other_peer;
153 * Desired delay for next sending we received from other peer
155 struct GNUNET_TIME_Absolute flow_delay_from_other_peer;
158 * Session timeout task
160 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
163 * expected delay for ACKs
165 struct GNUNET_TIME_Relative last_expected_ack_delay;
168 * desired delay between UDP messages
170 struct GNUNET_TIME_Relative last_expected_msg_delay;
172 struct GNUNET_ATS_Information ats;
174 struct GNUNET_HELLO_Address *address;
177 * Reference counter to indicate that this session is
178 * currently being used and must not be destroyed;
179 * setting @e in_destroy will destroy it as soon as
185 * Is this session about to be destroyed (sometimes we cannot
186 * destroy a session immediately as below us on the stack
187 * there might be code that still uses it; in this case,
188 * @e rc is non-zero).
194 * Closure for #session_cmp_it().
196 struct SessionCompareContext
199 const struct GNUNET_HELLO_Address *address;
203 * Closure for #process_inbound_tokenized_messages().
205 struct SourceInformation
210 struct GNUNET_PeerIdentity sender;
218 * Associated session.
220 struct Session *session;
223 * Number of bytes in source address.
230 * Closure for #find_receive_context().
232 struct FindReceiveContext
235 * Where to store the result.
237 struct DefragContext *rc;
242 const struct sockaddr *addr;
244 struct Session *session;
247 * Number of bytes in @e addr.
254 * Data structure to track defragmentation contexts based
255 * on the source of the UDP traffic.
261 * Defragmentation context.
263 struct GNUNET_DEFRAGMENT_Context *defrag;
266 * Source address this receive context is for (allocated at the
267 * end of the struct).
269 const struct sockaddr *src_addr;
272 * Reference to master plugin struct.
274 struct Plugin *plugin;
277 * Node in the defrag heap.
279 struct GNUNET_CONTAINER_HeapNode *hnode;
282 * Length of 'src_addr'
288 * Context to send fragmented messages
290 struct UDP_FragmentationContext
293 * Next in linked list
295 struct UDP_FragmentationContext *next;
298 * Previous in linked list
300 struct UDP_FragmentationContext *prev;
305 struct Plugin *plugin;
308 * Handle for GNUNET_FRAGMENT context
310 struct GNUNET_FRAGMENT_Context *frag;
313 * The session this fragmentation context belongs to
315 struct Session *session;
318 * Function to call upon completion of the transmission.
320 GNUNET_TRANSPORT_TransmitContinuation cont;
323 * Closure for @e cont.
330 struct GNUNET_TIME_Absolute timeout;
333 * Payload size of original unfragmented message
338 * Bytes used to send all fragments on wire including UDP overhead
342 unsigned int fragments_used;
348 * Message types included in a `struct UDP_MessageWrapper`
353 * Uninitialized (error)
358 * Fragment of a message.
360 UMT_MSG_FRAGMENTED = 1,
365 UMT_MSG_FRAGMENTED_COMPLETE = 2,
368 * Unfragmented message.
370 UMT_MSG_UNFRAGMENTED = 3,
373 * Receipt confirmation.
380 struct UDP_MessageWrapper
383 * Session this message belongs to
385 struct Session *session;
391 struct UDP_MessageWrapper *prev;
397 struct UDP_MessageWrapper *next;
402 enum UDP_MessageType msg_type;
405 * Message with size msg_size including UDP specific overhead
410 * Size of UDP message to send including UDP specific overhead
415 * Payload size of original message
422 struct GNUNET_TIME_Absolute timeout;
425 * Function to call upon completion of the transmission.
427 GNUNET_TRANSPORT_TransmitContinuation cont;
430 * Closure for @e cont.
435 * Fragmentation context
436 * frag_ctx == NULL if transport <= MTU
437 * frag_ctx != NULL if transport > MTU
439 struct UDP_FragmentationContext *frag_ctx;
444 * UDP ACK Message-Packet header (after defragmentation).
446 struct UDP_ACK_Message
451 struct GNUNET_MessageHeader header;
454 * Desired delay for flow control
459 * What is the identity of the sender
461 struct GNUNET_PeerIdentity sender;
468 static uint32_t myoptions;
471 * Encapsulation of all of the state of the plugin.
473 struct Plugin * plugin;
477 * We have been notified that our readset has something to read. We don't
478 * know which socket needs to be read, so we have to check each one
479 * Then reschedule this function to be called again once more is available.
481 * @param cls the plugin handle
482 * @param tc the scheduling context (for rescheduling this function again)
485 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
488 * We have been notified that our readset has something to read. We don't
489 * know which socket needs to be read, so we have to check each one
490 * Then reschedule this function to be called again once more is available.
492 * @param cls the plugin handle
493 * @param tc the scheduling context (for rescheduling this function again)
496 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
499 * (re)schedule select tasks for this plugin.
501 * @param plugin plugin to reschedule
504 schedule_select (struct Plugin *plugin)
506 struct GNUNET_TIME_Relative min_delay;
507 struct UDP_MessageWrapper *udpw;
509 if ((GNUNET_YES == plugin->enable_ipv4) && (NULL != plugin->sockv4))
511 /* Find a message ready to send:
512 * Flow delay from other peer is expired or not set (0) */
513 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
514 for (udpw = plugin->ipv4_queue_head; NULL != udpw; udpw = udpw->next)
515 min_delay = GNUNET_TIME_relative_min (min_delay,
516 GNUNET_TIME_absolute_get_remaining (
517 udpw->session->flow_delay_from_other_peer));
519 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK )
520 GNUNET_SCHEDULER_cancel (plugin->select_task);
523 * - write active set if message is ready
524 * - timeout minimum delay */
525 plugin->select_task = GNUNET_SCHEDULER_add_select (
526 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
527 (0 == min_delay.rel_value_us) ?
528 GNUNET_TIME_UNIT_FOREVER_REL : min_delay, plugin->rs_v4,
529 (0 == min_delay.rel_value_us) ? plugin->ws_v4 : NULL,
530 &udp_plugin_select, plugin);
532 if ((GNUNET_YES == plugin->enable_ipv6) && (NULL != plugin->sockv6))
534 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
535 for (udpw = plugin->ipv6_queue_head; NULL != udpw; udpw = udpw->next)
536 min_delay = GNUNET_TIME_relative_min (min_delay,
537 GNUNET_TIME_absolute_get_remaining (
538 udpw->session->flow_delay_from_other_peer));
540 if (GNUNET_SCHEDULER_NO_TASK != plugin->select_task_v6)
541 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
542 plugin->select_task_v6 = GNUNET_SCHEDULER_add_select (
543 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
544 (0 == min_delay.rel_value_us) ?
545 GNUNET_TIME_UNIT_FOREVER_REL : min_delay, plugin->rs_v6,
546 (0 == min_delay.rel_value_us) ? plugin->ws_v6 : NULL,
547 &udp_plugin_select_v6, plugin);
553 * Function called for a quick conversion of the binary address to
554 * a numeric address. Note that the caller must not free the
555 * address and that the next call to this function is allowed
556 * to override the address again.
559 * @param addr binary address
560 * @param addrlen length of the address
561 * @return string representing the same address
564 udp_address_to_string (void *cls,
568 static char rbuf[INET6_ADDRSTRLEN + 10];
569 char buf[INET6_ADDRSTRLEN];
573 const struct IPv4UdpAddress *t4;
574 const struct IPv6UdpAddress *t6;
579 if ((NULL != addr) && (addrlen == sizeof(struct IPv6UdpAddress)))
583 options = ntohl (t6->options);
584 port = ntohs (t6->u6_port);
585 memcpy (&a6, &t6->ipv6_addr, sizeof(a6));
588 else if ((NULL != addr) && (addrlen == sizeof(struct IPv4UdpAddress)))
592 options = ntohl (t4->options);
593 port = ntohs (t4->u4_port);
594 memcpy (&a4, &t4->ipv4_addr, sizeof(a4));
601 inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
603 GNUNET_snprintf (rbuf, sizeof(rbuf),
604 (af == AF_INET6) ? "%s.%u.[%s]:%u" : "%s.%u.%s:%u", PLUGIN_NAME, options,
611 * Function called to convert a string address to
614 * @param cls closure ('struct Plugin*')
615 * @param addr string address
616 * @param addrlen length of the address
617 * @param buf location to store the buffer
618 * @param added location to store the number of bytes in the buffer.
619 * If the function returns #GNUNET_SYSERR, its contents are undefined.
620 * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
623 udp_string_to_address (void *cls,
629 struct sockaddr_storage socket_address;
635 /* Format tcp.options.address:port */
640 if ((NULL == addr) || (addrlen == 0))
643 return GNUNET_SYSERR;
645 if ('\0' != addr[addrlen - 1])
648 return GNUNET_SYSERR;
650 if (strlen (addr) != addrlen - 1)
653 return GNUNET_SYSERR;
655 plugin = GNUNET_strdup (addr);
656 optionstr = strchr (plugin, '.');
657 if (NULL == optionstr)
661 return GNUNET_SYSERR;
665 options = atol (optionstr);
666 address = strchr (optionstr, '.');
671 return GNUNET_SYSERR;
677 GNUNET_STRINGS_to_address_ip (address, strlen (address),
682 return GNUNET_SYSERR;
687 switch (socket_address.ss_family)
691 struct IPv4UdpAddress *u4;
692 struct sockaddr_in *in4 = (struct sockaddr_in *) &socket_address;
693 u4 = GNUNET_new (struct IPv4UdpAddress);
694 u4->options = htonl (options);
695 u4->ipv4_addr = in4->sin_addr.s_addr;
696 u4->u4_port = in4->sin_port;
698 *added = sizeof(struct IPv4UdpAddress);
703 struct IPv6UdpAddress *u6;
704 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &socket_address;
705 u6 = GNUNET_new (struct IPv6UdpAddress);
706 u6->options = htonl (options);
707 u6->ipv6_addr = in6->sin6_addr;
708 u6->u6_port = in6->sin6_port;
710 *added = sizeof(struct IPv6UdpAddress);
715 return GNUNET_SYSERR;
721 * Append our port and forward the result.
723 * @param cls a 'struct PrettyPrinterContext'
724 * @param hostname result from DNS resolver
727 append_port (void *cls, const char *hostname)
729 struct PrettyPrinterContext *ppc = cls;
732 if (NULL == hostname)
734 /* Final call, done */
735 ppc->asc (ppc->asc_cls,
738 GNUNET_CONTAINER_DLL_remove (ppc_dll_head,
741 ppc->resolver_handle = NULL;
745 if (GNUNET_YES == ppc->ipv6)
746 GNUNET_asprintf (&ret,
753 GNUNET_asprintf (&ret,
759 ppc->asc (ppc->asc_cls,
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 @a asc
781 udp_plugin_address_pretty_printer (void *cls,
786 struct GNUNET_TIME_Relative timeout,
787 GNUNET_TRANSPORT_AddressStringCallback asc,
790 struct PrettyPrinterContext *ppc;
793 struct sockaddr_in a4;
794 struct sockaddr_in6 a6;
795 const struct IPv4UdpAddress *u4;
796 const struct IPv6UdpAddress *u6;
800 if (addrlen == sizeof(struct IPv6UdpAddress))
803 memset (&a6, 0, sizeof(a6));
804 a6.sin6_family = AF_INET6;
805 #if HAVE_SOCKADDR_IN_SIN_LEN
806 a6.sin6_len = sizeof (a6);
808 a6.sin6_port = u6->u6_port;
809 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof(struct in6_addr));
810 port = ntohs (u6->u6_port);
811 options = ntohl (u6->options);
815 else if (addrlen == sizeof(struct IPv4UdpAddress))
818 memset (&a4, 0, sizeof(a4));
819 a4.sin_family = AF_INET;
820 #if HAVE_SOCKADDR_IN_SIN_LEN
821 a4.sin_len = sizeof (a4);
823 a4.sin_port = u4->u4_port;
824 a4.sin_addr.s_addr = u4->ipv4_addr;
825 port = ntohs (u4->u4_port);
826 options = ntohl (u4->options);
832 /* invalid address */
834 asc (asc_cls, NULL , GNUNET_SYSERR);
835 asc (asc_cls, NULL, GNUNET_OK);
838 ppc = GNUNET_new (struct PrettyPrinterContext);
840 ppc->asc_cls = asc_cls;
842 ppc->options = options;
843 if (addrlen == sizeof(struct IPv6UdpAddress))
844 ppc->ipv6 = GNUNET_YES;
846 ppc->ipv6 = GNUNET_NO;
847 GNUNET_CONTAINER_DLL_insert (ppc_dll_head,
851 = GNUNET_RESOLVER_hostname_get (sb,
860 call_continuation (struct UDP_MessageWrapper *udpw,
865 LOG (GNUNET_ERROR_TYPE_DEBUG,
866 "Calling continuation for %u byte message to `%s' with result %s\n",
867 udpw->payload_size, GNUNET_i2s (&udpw->session->target),
868 (GNUNET_OK == result) ? "OK" : "SYSERR");
870 if (udpw->msg_size >= udpw->payload_size)
871 overhead = udpw->msg_size - udpw->payload_size;
873 overhead = udpw->msg_size;
878 switch (udpw->msg_type)
880 case UMT_MSG_UNFRAGMENTED:
881 if (NULL != udpw->cont)
883 /* Transport continuation */
884 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
885 udpw->payload_size, udpw->msg_size);
887 GNUNET_STATISTICS_update (plugin->env->stats,
888 "# UDP, unfragmented msgs, messages, sent, success", 1, GNUNET_NO);
889 GNUNET_STATISTICS_update (plugin->env->stats,
890 "# UDP, unfragmented msgs, bytes payload, sent, success",
891 udpw->payload_size, GNUNET_NO);
892 GNUNET_STATISTICS_update (plugin->env->stats,
893 "# UDP, unfragmented msgs, bytes overhead, sent, success", overhead,
895 GNUNET_STATISTICS_update (plugin->env->stats,
896 "# UDP, total, bytes overhead, sent", overhead, GNUNET_NO);
897 GNUNET_STATISTICS_update (plugin->env->stats,
898 "# UDP, total, bytes payload, sent", udpw->payload_size, GNUNET_NO);
900 case UMT_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,
904 GNUNET_OK, udpw->frag_ctx->payload_size,
905 udpw->frag_ctx->on_wire_size);
906 GNUNET_STATISTICS_update (plugin->env->stats,
907 "# UDP, fragmented msgs, messages, sent, success", 1, GNUNET_NO);
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", overhead,
914 GNUNET_STATISTICS_update (plugin->env->stats,
915 "# UDP, total, bytes overhead, sent", overhead, GNUNET_NO);
916 GNUNET_STATISTICS_update (plugin->env->stats,
917 "# UDP, total, bytes payload, sent", udpw->payload_size, GNUNET_NO);
918 GNUNET_STATISTICS_update (plugin->env->stats,
919 "# UDP, fragmented msgs, messages, pending", -1, GNUNET_NO);
921 case UMT_MSG_FRAGMENTED:
922 /* Fragmented message: enqueue next fragment */
923 if (NULL != udpw->cont)
924 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
925 udpw->payload_size, udpw->msg_size);
926 GNUNET_STATISTICS_update (plugin->env->stats,
927 "# UDP, fragmented msgs, fragments, sent, success", 1, GNUNET_NO);
928 GNUNET_STATISTICS_update (plugin->env->stats,
929 "# UDP, fragmented msgs, fragments bytes, sent, success",
930 udpw->msg_size, GNUNET_NO);
933 /* No continuation */
934 GNUNET_STATISTICS_update (plugin->env->stats,
935 "# UDP, ACK msgs, messages, sent, success", 1, GNUNET_NO);
936 GNUNET_STATISTICS_update (plugin->env->stats,
937 "# UDP, ACK msgs, bytes overhead, sent, success", overhead,
939 GNUNET_STATISTICS_update (plugin->env->stats,
940 "# UDP, total, bytes overhead, sent", overhead, GNUNET_NO);
948 switch (udpw->msg_type)
950 case UMT_MSG_UNFRAGMENTED:
951 /* Unfragmented message: failed to send */
952 if (NULL != udpw->cont)
953 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
954 udpw->payload_size, overhead);
955 GNUNET_STATISTICS_update (plugin->env->stats,
956 "# UDP, unfragmented msgs, messages, sent, failure", 1, GNUNET_NO);
957 GNUNET_STATISTICS_update (plugin->env->stats,
958 "# UDP, unfragmented msgs, bytes payload, sent, failure",
959 udpw->payload_size, GNUNET_NO);
960 GNUNET_STATISTICS_update (plugin->env->stats,
961 "# UDP, unfragmented msgs, bytes overhead, sent, failure", overhead,
964 case UMT_MSG_FRAGMENTED_COMPLETE:
965 GNUNET_assert(NULL != udpw->frag_ctx);
966 if (udpw->frag_ctx->cont != NULL )
967 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target,
968 GNUNET_SYSERR, udpw->frag_ctx->payload_size,
969 udpw->frag_ctx->on_wire_size);
970 GNUNET_STATISTICS_update (plugin->env->stats,
971 "# UDP, fragmented msgs, messages, sent, failure", 1, GNUNET_NO);
972 GNUNET_STATISTICS_update (plugin->env->stats,
973 "# UDP, fragmented msgs, bytes payload, sent, failure",
974 udpw->payload_size, GNUNET_NO);
975 GNUNET_STATISTICS_update (plugin->env->stats,
976 "# UDP, fragmented msgs, bytes payload, sent, failure", overhead,
978 GNUNET_STATISTICS_update (plugin->env->stats,
979 "# UDP, fragmented msgs, bytes payload, sent, failure", overhead,
981 GNUNET_STATISTICS_update (plugin->env->stats,
982 "# UDP, fragmented msgs, messages, pending", -1, GNUNET_NO);
984 case UMT_MSG_FRAGMENTED:
985 GNUNET_assert(NULL != udpw->frag_ctx);
986 /* Fragmented message: failed to send */
987 GNUNET_STATISTICS_update (plugin->env->stats,
988 "# UDP, fragmented msgs, fragments, sent, failure", 1, GNUNET_NO);
989 GNUNET_STATISTICS_update (plugin->env->stats,
990 "# UDP, fragmented msgs, fragments bytes, sent, failure",
991 udpw->msg_size, GNUNET_NO);
994 /* ACK message: failed to send */
995 GNUNET_STATISTICS_update (plugin->env->stats,
996 "# UDP, ACK msgs, messages, sent, failure", 1, GNUNET_NO);
1011 * Check if the given port is plausible (must be either our listen
1012 * port or our advertised port). If it is neither, we return
1015 * @param plugin global variables
1016 * @param in_port port number to check
1017 * @return #GNUNET_OK if port is either open_port or adv_port
1020 check_port (struct Plugin *plugin, uint16_t in_port)
1022 if ((in_port == plugin->port) || (in_port == plugin->aport))
1024 return GNUNET_SYSERR;
1029 * Function that will be called to check if a binary address for this
1030 * plugin is well-formed and corresponds to an address for THIS peer
1031 * (as per our configuration). Naturally, if absolutely necessary,
1032 * plugins can be a bit conservative in their answer, but in general
1033 * plugins should make sure that the address does not redirect
1034 * traffic to a 3rd party that might try to man-in-the-middle our
1037 * @param cls closure, should be our handle to the Plugin
1038 * @param addr pointer to the address
1039 * @param addrlen length of @a addr
1040 * @return #GNUNET_OK if this is a plausible address for this peer
1041 * and transport, #GNUNET_SYSERR if not
1045 udp_plugin_check_address (void *cls, const void *addr, size_t addrlen)
1047 struct Plugin *plugin = cls;
1048 struct IPv4UdpAddress *v4;
1049 struct IPv6UdpAddress *v6;
1051 if ((addrlen != sizeof(struct IPv4UdpAddress))
1052 && (addrlen != sizeof(struct IPv6UdpAddress)))
1055 return GNUNET_SYSERR;
1057 if (addrlen == sizeof(struct IPv4UdpAddress))
1059 v4 = (struct IPv4UdpAddress *) addr;
1060 if (GNUNET_OK != check_port (plugin, ntohs (v4->u4_port)))
1061 return GNUNET_SYSERR;
1063 != GNUNET_NAT_test_address (plugin->nat, &v4->ipv4_addr,
1064 sizeof(struct in_addr)))
1065 return GNUNET_SYSERR;
1069 v6 = (struct IPv6UdpAddress *) addr;
1070 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1073 return GNUNET_SYSERR;
1075 if (GNUNET_OK != check_port (plugin, ntohs (v6->u6_port)))
1076 return GNUNET_SYSERR;
1078 != GNUNET_NAT_test_address (plugin->nat, &v6->ipv6_addr,
1079 sizeof(struct in6_addr)))
1080 return GNUNET_SYSERR;
1087 * Function to free last resources associated with a session.
1089 * @param s session to free
1092 free_session (struct Session *s)
1094 if (NULL != s->frag_ctx)
1096 GNUNET_FRAGMENT_context_destroy (s->frag_ctx->frag, NULL, NULL );
1097 GNUNET_free(s->frag_ctx);
1105 dequeue (struct Plugin *plugin,
1106 struct UDP_MessageWrapper * udpw)
1108 if (plugin->bytes_in_buffer < udpw->msg_size)
1112 GNUNET_STATISTICS_update (plugin->env->stats,
1113 "# UDP, total, bytes in buffers", -(long long) udpw->msg_size,
1115 plugin->bytes_in_buffer -= udpw->msg_size;
1117 GNUNET_STATISTICS_update (plugin->env->stats, "# UDP, total, msgs in buffers",
1119 if (udpw->session->address->address_length == sizeof(struct IPv4UdpAddress))
1120 GNUNET_CONTAINER_DLL_remove(plugin->ipv4_queue_head,
1121 plugin->ipv4_queue_tail, udpw);
1122 else if (udpw->session->address->address_length == sizeof(struct IPv6UdpAddress))
1123 GNUNET_CONTAINER_DLL_remove(plugin->ipv6_queue_head,
1124 plugin->ipv6_queue_tail, udpw);
1131 fragmented_message_done (struct UDP_FragmentationContext *fc,
1134 struct UDP_MessageWrapper *udpw;
1135 struct UDP_MessageWrapper *tmp;
1136 struct UDP_MessageWrapper dummy;
1137 struct Session *s = fc->session;
1139 LOG(GNUNET_ERROR_TYPE_DEBUG,
1140 "%p : Fragmented message removed with result %s\n", fc,
1141 (result == GNUNET_SYSERR) ? "FAIL" : "SUCCESS");
1143 /* Call continuation for fragmented message */
1144 memset (&dummy, 0, sizeof(dummy));
1145 dummy.msg_type = UMT_MSG_FRAGMENTED_COMPLETE;
1146 dummy.msg_size = s->frag_ctx->on_wire_size;
1147 dummy.payload_size = s->frag_ctx->payload_size;
1148 dummy.frag_ctx = s->frag_ctx;
1150 dummy.cont_cls = NULL;
1153 call_continuation (&dummy, result);
1155 /* Remove leftover fragments from queue */
1156 if (s->address->address_length == sizeof(struct IPv6UdpAddress))
1158 udpw = plugin->ipv6_queue_head;
1159 while (NULL != udpw)
1162 if ((udpw->frag_ctx != NULL )&& (udpw->frag_ctx == s->frag_ctx)){
1163 dequeue (plugin, udpw);
1164 call_continuation (udpw, GNUNET_SYSERR);
1170 if (s->address->address_length == sizeof(struct IPv4UdpAddress))
1172 udpw = plugin->ipv4_queue_head;
1173 while (udpw != NULL )
1176 if ((NULL != udpw->frag_ctx) && (udpw->frag_ctx == s->frag_ctx))
1178 dequeue (plugin, udpw);
1179 call_continuation (udpw, GNUNET_SYSERR);
1186 /* Destroy fragmentation context */
1187 GNUNET_FRAGMENT_context_destroy (fc->frag, &s->last_expected_msg_delay,
1188 &s->last_expected_ack_delay);
1194 * Scan the heap for a receive context with the given address.
1196 * @param cls the `struct FindReceiveContext`
1197 * @param node internal node of the heap
1198 * @param element value stored at the node (a 'struct ReceiveContext')
1199 * @param cost cost associated with the node
1200 * @return #GNUNET_YES if we should continue to iterate,
1201 * #GNUNET_NO if not.
1204 find_receive_context (void *cls, struct GNUNET_CONTAINER_HeapNode *node,
1205 void *element, GNUNET_CONTAINER_HeapCostType cost)
1207 struct FindReceiveContext *frc = cls;
1208 struct DefragContext *e = element;
1210 if ((frc->addr_len == e->addr_len)
1211 && (0 == memcmp (frc->addr, e->src_addr, frc->addr_len)))
1221 * Functions with this signature are called whenever we need
1222 * to close a session due to a disconnect or failure to
1223 * establish a connection.
1225 * @param cls closure with the `struct Plugin`
1226 * @param s session to close down
1227 * @return #GNUNET_OK on success
1230 udp_disconnect_session (void *cls, struct Session *s)
1232 struct Plugin *plugin = cls;
1233 struct UDP_MessageWrapper *udpw;
1234 struct UDP_MessageWrapper *next;
1235 struct FindReceiveContext frc;
1237 GNUNET_assert(GNUNET_YES != s->in_destroy);
1238 LOG(GNUNET_ERROR_TYPE_DEBUG, "Session %p to peer `%s' address ended\n", s,
1239 GNUNET_i2s (&s->target),
1240 udp_address_to_string (NULL, s->address->address, s->address->address_length));
1241 /* stop timeout task */
1242 if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
1244 GNUNET_SCHEDULER_cancel (s->timeout_task);
1245 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1247 if (NULL != s->frag_ctx)
1249 /* Remove fragmented message due to disconnect */
1250 fragmented_message_done (s->frag_ctx, GNUNET_SYSERR);
1254 frc.addr = s->address->address;
1255 frc.addr_len = s->address->address_length;
1256 /* Lookup existing receive context for this address */
1257 if (NULL != plugin->defrag_ctxs)
1259 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
1260 &find_receive_context, &frc);
1263 struct DefragContext *d_ctx = frc.rc;
1264 GNUNET_CONTAINER_heap_remove_node (d_ctx->hnode);
1265 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
1266 GNUNET_free (d_ctx);
1270 next = plugin->ipv4_queue_head;
1271 while (NULL != (udpw = next))
1274 if (udpw->session == s)
1276 dequeue (plugin, udpw);
1277 call_continuation (udpw, GNUNET_SYSERR);
1281 next = plugin->ipv6_queue_head;
1282 while (NULL != (udpw = next))
1285 if (udpw->session == s)
1287 dequeue (plugin, udpw);
1288 call_continuation (udpw, GNUNET_SYSERR);
1292 plugin->env->session_end (plugin->env->cls, s->address, s);
1294 if (NULL != s->frag_ctx)
1296 if (NULL != s->frag_ctx->cont)
1298 s->frag_ctx->cont (s->frag_ctx->cont_cls, &s->target, GNUNET_SYSERR,
1299 s->frag_ctx->payload_size, s->frag_ctx->on_wire_size);
1300 LOG(GNUNET_ERROR_TYPE_DEBUG,
1301 "Calling continuation for fragemented message to `%s' with result SYSERR\n",
1302 GNUNET_i2s (&s->target));
1307 GNUNET_YES == GNUNET_CONTAINER_multipeermap_remove (plugin->sessions, &s->target, s));
1308 GNUNET_STATISTICS_set (plugin->env->stats, "# UDP sessions active",
1309 GNUNET_CONTAINER_multipeermap_size (plugin->sessions), GNUNET_NO);
1311 s->in_destroy = GNUNET_YES;
1314 GNUNET_HELLO_address_free (s->address);
1322 * Function that is called to get the keepalive factor.
1323 * #GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to
1324 * calculate the interval between keepalive packets.
1326 * @param cls closure with the `struct Plugin`
1327 * @return keepalive factor
1330 udp_query_keepalive_factor (void *cls)
1337 * Destroy a session, plugin is being unloaded.
1339 * @param cls the `struct Plugin`
1340 * @param key hash of public key of target peer
1341 * @param value a `struct PeerSession *` to clean up
1342 * @return #GNUNET_OK (continue to iterate)
1345 disconnect_and_free_it (void *cls,
1346 const struct GNUNET_PeerIdentity *key,
1349 struct Plugin *plugin = cls;
1351 udp_disconnect_session (plugin, value);
1357 * Disconnect from a remote node. Clean up session if we have one for
1360 * @param cls closure for this call (should be handle to Plugin)
1361 * @param target the peeridentity of the peer to disconnect
1362 * @return #GNUNET_OK on success, #GNUNET_SYSERR if the operation failed
1365 udp_disconnect (void *cls,
1366 const struct GNUNET_PeerIdentity *target)
1368 struct Plugin *plugin = cls;
1370 LOG (GNUNET_ERROR_TYPE_DEBUG,
1371 "Disconnecting from peer `%s'\n",
1372 GNUNET_i2s (target));
1373 /* Clean up sessions */
1374 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessions, target,
1375 &disconnect_and_free_it, plugin);
1380 * Session was idle, so disconnect it
1382 * @param cls the `struct Session` to time out
1383 * @param tc scheduler context
1386 session_timeout (void *cls,
1387 const struct GNUNET_SCHEDULER_TaskContext *tc)
1389 struct Session *s = cls;
1391 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1393 "Session %p was idle for %s, disconnecting\n",
1395 GNUNET_STRINGS_relative_time_to_string (UDP_SESSION_TIME_OUT,
1397 /* call session destroy function */
1398 udp_disconnect_session (plugin, s);
1403 * Increment session timeout due to activity
1405 * @param s session to reschedule timeout activity for
1408 reschedule_session_timeout (struct Session *s)
1410 if (GNUNET_YES == s->in_destroy)
1412 GNUNET_assert(GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
1413 GNUNET_SCHEDULER_cancel (s->timeout_task);
1414 s->timeout_task = GNUNET_SCHEDULER_add_delayed (UDP_SESSION_TIME_OUT,
1415 &session_timeout, s);
1416 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Timeout restarted for session %p\n", s);
1420 static struct Session *
1421 create_session (struct Plugin *plugin,
1422 const struct GNUNET_HELLO_Address *address)
1426 s = GNUNET_new (struct Session);
1427 s->address = GNUNET_HELLO_address_copy (address);
1428 s->target = address->peer;
1429 s->last_expected_ack_delay = GNUNET_TIME_relative_multiply (
1430 GNUNET_TIME_UNIT_MILLISECONDS, 250);
1431 s->last_expected_msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
1432 s->flow_delay_from_other_peer = GNUNET_TIME_UNIT_ZERO_ABS;
1433 s->flow_delay_for_other_peer = GNUNET_TIME_UNIT_ZERO;
1434 s->timeout_task = GNUNET_SCHEDULER_add_delayed (UDP_SESSION_TIME_OUT,
1435 &session_timeout, s);
1441 session_cmp_it (void *cls,
1442 const struct GNUNET_PeerIdentity *key,
1445 struct SessionCompareContext *cctx = cls;
1446 const struct GNUNET_HELLO_Address *address = cctx->address;
1447 struct Session *s = value;
1449 LOG (GNUNET_ERROR_TYPE_DEBUG,
1450 "Comparing address %s <-> %s\n",
1451 udp_address_to_string (NULL, address->address, address->address_length),
1452 udp_address_to_string (NULL, s->address->address, s->address->address_length));
1454 if (0 == GNUNET_HELLO_address_cmp(s->address, cctx->address))
1464 * Function obtain the network type for a session
1466 * @param cls closure ('struct Plugin*')
1467 * @param session the session
1468 * @return the network type
1470 static enum GNUNET_ATS_Network_Type
1471 udp_get_network (void *cls,
1472 struct Session *session)
1474 return ntohl (session->ats.value);
1479 * Creates a new outbound session the transport service will use to
1480 * send data to the peer
1482 * @param cls the plugin
1483 * @param address the address
1484 * @return the session or NULL of max connections exceeded
1486 static struct Session *
1487 udp_plugin_lookup_session (void *cls,
1488 const struct GNUNET_HELLO_Address *address)
1490 struct Plugin * plugin = cls;
1491 struct IPv6UdpAddress * udp_a6;
1492 struct IPv4UdpAddress * udp_a4;
1494 GNUNET_assert(plugin != NULL);
1495 GNUNET_assert(address != NULL);
1497 if ( (address->address == NULL )||
1498 ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1499 (address->address_length != sizeof (struct IPv6UdpAddress))))
1501 LOG (GNUNET_ERROR_TYPE_WARNING,
1502 _("Trying to create session for address of unexpected length %u (should be %u or %u)\n"),
1503 address->address_length,
1504 sizeof (struct IPv4UdpAddress),
1505 sizeof (struct IPv6UdpAddress));
1509 if (address->address_length == sizeof(struct IPv4UdpAddress))
1511 if (plugin->sockv4 == NULL)
1513 udp_a4 = (struct IPv4UdpAddress *) address->address;
1514 if (udp_a4->u4_port == 0)
1518 if (address->address_length == sizeof(struct IPv6UdpAddress))
1520 if (plugin->sockv6 == NULL)
1522 udp_a6 = (struct IPv6UdpAddress *) address->address;
1523 if (udp_a6->u6_port == 0)
1527 /* check if session already exists */
1528 struct SessionCompareContext cctx;
1529 cctx.address = address;
1531 LOG(GNUNET_ERROR_TYPE_DEBUG,
1532 "Looking for existing session for peer `%s' `%s' \n",
1533 GNUNET_i2s (&address->peer),
1534 udp_address_to_string(NULL, address->address, address->address_length));
1535 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessions, &address->peer,
1536 session_cmp_it, &cctx);
1537 if (cctx.res != NULL )
1539 LOG (GNUNET_ERROR_TYPE_DEBUG,
1540 "Found existing session %p\n",
1548 static struct Session *
1549 udp_plugin_create_session (void *cls,
1550 const struct GNUNET_HELLO_Address *address)
1553 struct IPv4UdpAddress *udp_v4;
1554 struct IPv6UdpAddress *udp_v6;
1556 s = create_session (plugin, address);
1557 if (sizeof (struct IPv4UdpAddress) == address->address_length)
1559 struct sockaddr_in v4;
1560 udp_v4 = (struct IPv4UdpAddress *) address->address;
1561 memset (&v4, '\0', sizeof (v4));
1562 v4.sin_family = AF_INET;
1563 #if HAVE_SOCKADDR_IN_SIN_LEN
1564 v4.sin_len = sizeof (struct sockaddr_in);
1566 v4.sin_port = udp_v4->u4_port;
1567 v4.sin_addr.s_addr = udp_v4->ipv4_addr;
1568 s->ats = plugin->env->get_address_type (plugin->env->cls,
1569 (const struct sockaddr *) &v4, sizeof (v4));
1571 else if (sizeof (struct IPv6UdpAddress) == address->address_length)
1573 struct sockaddr_in6 v6;
1574 udp_v6 = (struct IPv6UdpAddress *) address->address;
1575 memset (&v6, '\0', sizeof (v6));
1576 v6.sin6_family = AF_INET6;
1577 #if HAVE_SOCKADDR_IN_SIN_LEN
1578 v6.sin6_len = sizeof (struct sockaddr_in6);
1580 v6.sin6_port = udp_v6->u6_port;
1581 v6.sin6_addr = udp_v6->ipv6_addr;
1582 s->ats = plugin->env->get_address_type (plugin->env->cls,
1583 (const struct sockaddr *) &v6, sizeof (v6));
1587 return NULL; /* protocol not supported or address invalid */
1588 LOG(GNUNET_ERROR_TYPE_DEBUG,
1589 "Creating new %s session %p for peer `%s' address `%s'\n",
1590 GNUNET_HELLO_address_check_option (address, GNUNET_HELLO_ADDRESS_INFO_INBOUND) ? "inbound" : "outbound",
1591 s, GNUNET_i2s (&address->peer),
1592 udp_address_to_string( NULL,address->address,address->address_length));
1594 GNUNET_OK == GNUNET_CONTAINER_multipeermap_put (plugin->sessions, &s->target, s, GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1595 GNUNET_STATISTICS_set (plugin->env->stats, "# UDP sessions active",
1596 GNUNET_CONTAINER_multipeermap_size (plugin->sessions), GNUNET_NO);
1602 udp_plugin_update_session_timeout (void *cls,
1603 const struct GNUNET_PeerIdentity *peer,
1604 struct Session *session)
1607 GNUNET_CONTAINER_multipeermap_contains_value (plugin->sessions, peer,
1614 /* Reschedule session timeout */
1615 reschedule_session_timeout (session);
1620 * Creates a new outbound session the transport service will use to send data to the
1623 * @param cls the plugin
1624 * @param address the address
1625 * @return the session or NULL of max connections exceeded
1627 static struct Session *
1628 udp_plugin_get_session (void *cls,
1629 const struct GNUNET_HELLO_Address *address)
1633 if (NULL == address)
1638 if ( (address->address_length != sizeof(struct IPv4UdpAddress)) &&
1639 (address->address_length != sizeof(struct IPv6UdpAddress)) )
1642 /* otherwise create new */
1643 if (NULL != (s = udp_plugin_lookup_session (cls, address)))
1645 return udp_plugin_create_session (cls, address);
1650 enqueue (struct Plugin *plugin,
1651 struct UDP_MessageWrapper *udpw)
1653 if (plugin->bytes_in_buffer + udpw->msg_size > INT64_MAX)
1657 GNUNET_STATISTICS_update (plugin->env->stats,
1658 "# UDP, total, bytes in buffers", udpw->msg_size, GNUNET_NO);
1659 plugin->bytes_in_buffer += udpw->msg_size;
1661 GNUNET_STATISTICS_update (plugin->env->stats, "# UDP, total, msgs in buffers",
1663 if (udpw->session->address->address_length == sizeof (struct IPv4UdpAddress))
1664 GNUNET_CONTAINER_DLL_insert(plugin->ipv4_queue_head,
1665 plugin->ipv4_queue_tail, udpw);
1666 else if (udpw->session->address->address_length == sizeof (struct IPv6UdpAddress))
1667 GNUNET_CONTAINER_DLL_insert(plugin->ipv6_queue_head,
1668 plugin->ipv6_queue_tail, udpw);
1675 * Fragment message was transmitted via UDP, let fragmentation know
1676 * to send the next fragment now.
1678 * @param cls the 'struct UDPMessageWrapper' of the fragment
1679 * @param target destination peer (ignored)
1680 * @param result GNUNET_OK on success (ignored)
1681 * @param payload bytes payload sent
1682 * @param physical bytes physical sent
1685 send_next_fragment (void *cls,
1686 const struct GNUNET_PeerIdentity *target,
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, "Enqueuing fragment with %u bytes\n", msg_len);
1715 frag_ctx->fragments_used++;
1716 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msg_len);
1717 udpw->session = frag_ctx->session;
1718 udpw->msg_buf = (char *) &udpw[1];
1719 udpw->msg_size = msg_len;
1720 udpw->payload_size = msg_len; /*FIXME: minus fragment overhead */
1721 udpw->cont = &send_next_fragment;
1722 udpw->cont_cls = udpw;
1723 udpw->timeout = frag_ctx->timeout;
1724 udpw->frag_ctx = frag_ctx;
1725 udpw->msg_type = UMT_MSG_FRAGMENTED;
1726 memcpy (udpw->msg_buf, msg, msg_len);
1727 enqueue (plugin, udpw);
1728 schedule_select (plugin);
1733 * Function that can be used by the transport service to transmit
1734 * a message using the plugin. Note that in the case of a
1735 * peer disconnecting, the continuation MUST be called
1736 * prior to the disconnect notification itself. This function
1737 * will be called with this peer's HELLO message to initiate
1738 * a fresh connection to another peer.
1740 * @param cls closure
1741 * @param s which session must be used
1742 * @param msgbuf the message to transmit
1743 * @param msgbuf_size number of bytes in 'msgbuf'
1744 * @param priority how important is the message (most plugins will
1745 * ignore message priority and just FIFO)
1746 * @param to how long to wait at most for the transmission (does not
1747 * require plugins to discard the message after the timeout,
1748 * just advisory for the desired delay; most plugins will ignore
1750 * @param cont continuation to call once the message has
1751 * been transmitted (or if the transport is ready
1752 * for the next transmission call; or if the
1753 * peer disconnected...); can be NULL
1754 * @param cont_cls closure for cont
1755 * @return number of bytes used (on the physical network, with overheads);
1756 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1757 * and does NOT mean that the message was not transmitted (DV)
1760 udp_plugin_send (void *cls,
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->address->address_length == sizeof(struct IPv6UdpAddress)) &&
1778 (plugin->sockv6 == NULL) )
1779 return GNUNET_SYSERR;
1780 if ( (s->address->address_length == sizeof(struct IPv4UdpAddress)) &&
1781 (plugin->sockv4 == NULL) )
1782 return GNUNET_SYSERR;
1783 if (udpmlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1786 return GNUNET_SYSERR;
1789 != GNUNET_CONTAINER_multipeermap_contains_value (plugin->sessions,
1793 return GNUNET_SYSERR;
1795 LOG (GNUNET_ERROR_TYPE_DEBUG,
1796 "UDP transmits %u-byte message to `%s' using address `%s'\n", udpmlen,
1797 GNUNET_i2s (&s->target),
1798 udp_address_to_string (NULL, s->address->address,
1799 s->address->address_length));
1802 udp = (struct UDPMessage *) mbuf;
1803 udp->header.size = htons (udpmlen);
1804 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
1805 udp->reserved = htonl (0);
1806 udp->sender = *plugin->env->my_identity;
1808 /* We do not update the session time out here!
1809 * Otherwise this session will not timeout since we send keep alive before
1810 * session can timeout
1812 * For UDP we update session timeout only on receive, this will cover keep
1813 * alives, since remote peer will reply with keep alive response!
1815 if (udpmlen <= UDP_MTU)
1817 /* unfragmented message */
1818 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + udpmlen);
1820 udpw->msg_buf = (char *) &udpw[1];
1821 udpw->msg_size = udpmlen; /* message size with UDP overhead */
1822 udpw->payload_size = msgbuf_size; /* message size without UDP overhead */
1823 udpw->timeout = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (), to);
1825 udpw->cont_cls = cont_cls;
1826 udpw->frag_ctx = NULL;
1827 udpw->msg_type = UMT_MSG_UNFRAGMENTED;
1828 memcpy (udpw->msg_buf, udp, sizeof(struct UDPMessage));
1829 memcpy (&udpw->msg_buf[sizeof(struct UDPMessage)], msgbuf, msgbuf_size);
1830 enqueue (plugin, udpw);
1832 GNUNET_STATISTICS_update (plugin->env->stats,
1833 "# UDP, unfragmented msgs, messages, attempt", 1, GNUNET_NO);
1834 GNUNET_STATISTICS_update (plugin->env->stats,
1835 "# UDP, unfragmented msgs, bytes payload, attempt", udpw->payload_size,
1840 /* fragmented message */
1841 if (s->frag_ctx != NULL)
1842 return GNUNET_SYSERR;
1843 memcpy (&udp[1], msgbuf, msgbuf_size);
1844 frag_ctx = GNUNET_new (struct UDP_FragmentationContext);
1845 frag_ctx->plugin = plugin;
1846 frag_ctx->session = s;
1847 frag_ctx->cont = cont;
1848 frag_ctx->cont_cls = cont_cls;
1849 frag_ctx->timeout = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1851 frag_ctx->payload_size = msgbuf_size; /* unfragmented message size without UDP overhead */
1852 frag_ctx->on_wire_size = 0; /* bytes with UDP and fragmentation overhead */
1853 frag_ctx->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
1854 UDP_MTU, &plugin->tracker, s->last_expected_msg_delay,
1855 s->last_expected_ack_delay, &udp->header, &enqueue_fragment, frag_ctx);
1856 s->frag_ctx = frag_ctx;
1857 GNUNET_STATISTICS_update (plugin->env->stats,
1858 "# UDP, fragmented msgs, messages, pending", 1, GNUNET_NO);
1859 GNUNET_STATISTICS_update (plugin->env->stats,
1860 "# UDP, fragmented msgs, messages, attempt", 1, GNUNET_NO);
1861 GNUNET_STATISTICS_update (plugin->env->stats,
1862 "# UDP, fragmented msgs, bytes payload, attempt",
1863 frag_ctx->payload_size, GNUNET_NO);
1865 schedule_select (plugin);
1871 * Our external IP address/port mapping has changed.
1873 * @param cls closure, the `struct LocalAddrList`
1874 * @param add_remove #GNUNET_YES to mean the new public IP address, #GNUNET_NO to mean
1875 * the previous (now invalid) one
1876 * @param addr either the previous or the new public IP address
1877 * @param addrlen actual lenght of the address
1880 udp_nat_port_map_callback (void *cls, int add_remove,
1881 const struct sockaddr *addr,
1884 struct Plugin *plugin = cls;
1885 struct GNUNET_HELLO_Address *address;
1886 struct IPv4UdpAddress u4;
1887 struct IPv6UdpAddress u6;
1891 LOG(GNUNET_ERROR_TYPE_INFO, "NAT notification to %s address `%s'\n",
1892 (GNUNET_YES == add_remove) ? "add" : "remove",
1893 GNUNET_a2s (addr, addrlen));
1895 /* convert 'address' to our internal format */
1896 switch (addr->sa_family)
1899 GNUNET_assert(addrlen == sizeof(struct sockaddr_in));
1900 memset (&u4, 0, sizeof(u4));
1901 u4.options = htonl (myoptions);
1902 u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1903 u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
1904 if (0 == ((struct sockaddr_in *) addr)->sin_port)
1907 args = sizeof(struct IPv4UdpAddress);
1910 GNUNET_assert(addrlen == sizeof(struct sockaddr_in6));
1911 memset (&u6, 0, sizeof(u6));
1912 u6.options = htonl (myoptions);
1913 if (0 == ((struct sockaddr_in6 *) addr)->sin6_port)
1915 memcpy (&u6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
1916 sizeof(struct in6_addr));
1917 u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
1919 args = sizeof(struct IPv6UdpAddress);
1925 /* modify our published address list */
1926 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
1927 PLUGIN_NAME, arg, args, GNUNET_HELLO_ADDRESS_INFO_NONE);
1928 plugin->env->notify_address (plugin->env->cls, add_remove, address);
1929 GNUNET_HELLO_address_free (address);
1934 * Message tokenizer has broken up an incomming message. Pass it on
1937 * @param cls the 'struct Plugin'
1938 * @param client the `struct SourceInformation`
1939 * @param hdr the actual message
1940 * @return #GNUNET_OK (always)
1943 process_inbound_tokenized_messages (void *cls, void *client,
1944 const struct GNUNET_MessageHeader *hdr)
1946 struct Plugin *plugin = cls;
1947 struct SourceInformation *si = client;
1948 struct GNUNET_TIME_Relative delay;
1950 GNUNET_assert(si->session != NULL);
1951 if (GNUNET_YES == si->session->in_destroy)
1954 GNUNET_break(ntohl (si->session->ats.value) != GNUNET_ATS_NET_UNSPECIFIED);
1955 reschedule_session_timeout (si->session);
1956 delay = plugin->env->receive (plugin->env->cls, si->session->address, si->session, hdr);
1957 plugin->env->update_address_metrics (plugin->env->cls,
1958 si->session->address, si->session,
1959 &si->session->ats, 1);
1960 si->session->flow_delay_for_other_peer = delay;
1966 * We've received a UDP Message. Process it (pass contents to main service).
1968 * @param plugin plugin context
1969 * @param msg the message
1970 * @param sender_addr sender address
1971 * @param sender_addr_len number of bytes in sender_addr
1974 process_udp_message (struct Plugin *plugin,
1975 const struct UDPMessage *msg,
1976 const struct sockaddr *sender_addr,
1977 socklen_t sender_addr_len)
1979 struct SourceInformation si;
1981 struct GNUNET_HELLO_Address *address;
1982 struct IPv4UdpAddress u4;
1983 struct IPv6UdpAddress u6;
1987 if (0 != ntohl (msg->reserved))
1992 if (ntohs (msg->header.size)
1993 < sizeof(struct GNUNET_MessageHeader) + sizeof(struct UDPMessage))
1999 /* convert address */
2000 switch (sender_addr->sa_family)
2003 GNUNET_assert(sender_addr_len == sizeof(struct sockaddr_in));
2004 memset (&u4, 0, sizeof(u4));
2005 u6.options = htonl (0);
2006 u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
2007 u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
2012 GNUNET_assert(sender_addr_len == sizeof(struct sockaddr_in6));
2013 memset (&u6, 0, sizeof(u6));
2014 u6.options = htonl (0);
2015 u6.ipv6_addr = ((struct sockaddr_in6 *) sender_addr)->sin6_addr;
2016 u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
2024 LOG(GNUNET_ERROR_TYPE_DEBUG,
2025 "Received message with %u bytes from peer `%s' at `%s'\n",
2026 (unsigned int ) ntohs (msg->header.size), GNUNET_i2s (&msg->sender),
2027 GNUNET_a2s (sender_addr, sender_addr_len));
2029 address = GNUNET_HELLO_address_allocate ( &msg->sender, PLUGIN_NAME,
2030 arg, args, GNUNET_HELLO_ADDRESS_INFO_INBOUND);
2031 if (NULL == (s = udp_plugin_lookup_session (plugin, address)))
2033 s = udp_plugin_create_session (plugin, address);
2034 plugin->env->session_start (NULL, address, s, NULL, 0);
2036 GNUNET_free(address);
2038 /* iterate over all embedded messages */
2040 si.sender = msg->sender;
2044 GNUNET_SERVER_mst_receive (plugin->mst, &si, (const char *) &msg[1],
2045 ntohs (msg->header.size) - sizeof(struct UDPMessage), GNUNET_YES,
2048 if ((0 == s->rc) && (GNUNET_YES == s->in_destroy))
2053 * Process a defragmented message.
2055 * @param cls the 'struct ReceiveContext'
2056 * @param msg the message
2059 fragment_msg_proc (void *cls, const struct GNUNET_MessageHeader *msg)
2061 struct DefragContext *rc = cls;
2063 if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
2068 if (ntohs (msg->size) < sizeof(struct UDPMessage))
2073 process_udp_message (rc->plugin, (const struct UDPMessage *) msg,
2074 rc->src_addr, rc->addr_len);
2079 * Context to lookup a session based on a IP address
2081 struct LookupContext
2086 struct Session *res;
2089 * The socket address
2091 const struct sockaddr *address;
2094 * The socket address length
2099 * Is a fragmentation context required for the session
2101 int must_have_frag_ctx;
2106 lookup_session_by_sockaddr_it (void *cls,
2107 const struct GNUNET_PeerIdentity *key,
2110 struct LookupContext *l_ctx = cls;
2111 struct Session * s = value;
2112 struct IPv4UdpAddress u4;
2113 struct IPv6UdpAddress u6;
2117 /* convert address */
2118 switch (l_ctx->address->sa_family)
2121 GNUNET_assert(l_ctx->addr_len == sizeof(struct sockaddr_in));
2122 memset (&u4, 0, sizeof(u4));
2123 u6.options = htonl (0);
2124 u4.ipv4_addr = ((struct sockaddr_in *) l_ctx->address)->sin_addr.s_addr;
2125 u4.u4_port = ((struct sockaddr_in *) l_ctx->address)->sin_port;
2130 GNUNET_assert(l_ctx->addr_len == sizeof(struct sockaddr_in6));
2131 memset (&u6, 0, sizeof(u6));
2132 u6.options = htonl (0);
2133 u6.ipv6_addr = ((struct sockaddr_in6 *) l_ctx->address)->sin6_addr;
2134 u6.u6_port = ((struct sockaddr_in6 *) l_ctx->address)->sin6_port;
2144 if ((GNUNET_YES == l_ctx->must_have_frag_ctx) && (NULL == s->frag_ctx))
2147 /* Does not compare peer identities but addresses */
2148 if ((args == s->address->address_length) &&
2149 (0 == memcmp (arg, s->address->address, args)))
2159 * Transmit an acknowledgement.
2161 * @param cls the 'struct ReceiveContext'
2162 * @param id message ID (unused)
2163 * @param msg ack to transmit
2166 ack_proc (void *cls, uint32_t id, const struct GNUNET_MessageHeader *msg)
2168 struct DefragContext *rc = cls;
2169 size_t msize = sizeof(struct UDP_ACK_Message) + ntohs (msg->size);
2170 struct UDP_ACK_Message *udp_ack;
2172 struct UDP_MessageWrapper *udpw;
2174 struct LookupContext l_ctx;
2176 l_ctx.address = rc->src_addr;
2177 l_ctx.addr_len = rc->addr_len;
2178 l_ctx.must_have_frag_ctx = GNUNET_NO;
2180 GNUNET_CONTAINER_multipeermap_iterate (rc->plugin->sessions,
2181 &lookup_session_by_sockaddr_it, &l_ctx);
2185 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2186 "Trying to transmit ACK to peer `%s' but not session found!\n",
2187 GNUNET_a2s(rc->src_addr, rc->addr_len));
2189 GNUNET_CONTAINER_heap_remove_node (rc->hnode);
2190 GNUNET_DEFRAGMENT_context_destroy (rc->defrag);
2195 if (s->flow_delay_for_other_peer.rel_value_us <= UINT32_MAX)
2196 delay = s->flow_delay_for_other_peer.rel_value_us;
2198 LOG(GNUNET_ERROR_TYPE_DEBUG, "Sending ACK to `%s' including delay of %s\n",
2199 GNUNET_a2s (rc->src_addr, (rc->src_addr->sa_family == AF_INET) ? sizeof (struct sockaddr_in) : sizeof (struct sockaddr_in6)),
2200 GNUNET_STRINGS_relative_time_to_string (s->flow_delay_for_other_peer, GNUNET_YES));
2201 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msize);
2202 udpw->msg_size = msize;
2203 udpw->payload_size = 0;
2205 udpw->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
2206 udpw->msg_buf = (char *) &udpw[1];
2207 udpw->msg_type = UMT_MSG_ACK;
2208 udp_ack = (struct UDP_ACK_Message *) udpw->msg_buf;
2209 udp_ack->header.size = htons ((uint16_t) msize);
2210 udp_ack->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
2211 udp_ack->delay = htonl (delay);
2212 udp_ack->sender = *rc->plugin->env->my_identity;
2213 memcpy (&udp_ack[1], msg, ntohs (msg->size));
2214 enqueue (rc->plugin, udpw);
2215 schedule_select (rc->plugin);
2220 read_process_msg (struct Plugin *plugin,
2221 const struct GNUNET_MessageHeader *msg,
2222 const struct sockaddr *addr,
2225 if (ntohs (msg->size) < sizeof(struct UDPMessage))
2230 process_udp_message (plugin, (const struct UDPMessage *) msg, addr, fromlen);
2235 read_process_ack (struct Plugin *plugin,
2236 const struct GNUNET_MessageHeader *msg,
2237 const struct sockaddr *addr,
2240 const struct GNUNET_MessageHeader *ack;
2241 const struct UDP_ACK_Message *udp_ack;
2242 struct LookupContext l_ctx;
2244 struct GNUNET_TIME_Relative flow_delay;
2246 if (ntohs (msg->size)
2247 < sizeof(struct UDP_ACK_Message) + sizeof(struct GNUNET_MessageHeader))
2252 udp_ack = (const struct UDP_ACK_Message *) msg;
2254 /* Lookup session based on sockaddr */
2255 l_ctx.address = addr;
2256 l_ctx.addr_len = fromlen;
2258 l_ctx.must_have_frag_ctx = GNUNET_YES;
2259 GNUNET_CONTAINER_multipeermap_iterate (plugin->sessions,
2260 &lookup_session_by_sockaddr_it, &l_ctx);
2262 if ((NULL == s) || (NULL == s->frag_ctx))
2267 flow_delay.rel_value_us = (uint64_t) ntohl (udp_ack->delay);
2268 LOG(GNUNET_ERROR_TYPE_DEBUG, "We received a sending delay of %s\n",
2269 GNUNET_STRINGS_relative_time_to_string (flow_delay, GNUNET_YES));
2270 s->flow_delay_from_other_peer = GNUNET_TIME_relative_to_absolute (flow_delay);
2272 ack = (const struct GNUNET_MessageHeader *) &udp_ack[1];
2273 if (ntohs (ack->size) != ntohs (msg->size) - sizeof(struct UDP_ACK_Message))
2280 != memcmp (&l_ctx.res->target, &udp_ack->sender,
2281 sizeof(struct GNUNET_PeerIdentity)))
2283 if (GNUNET_OK != GNUNET_FRAGMENT_process_ack (s->frag_ctx->frag, ack))
2285 LOG(GNUNET_ERROR_TYPE_DEBUG,
2286 "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
2287 (unsigned int ) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2288 GNUNET_a2s (addr, fromlen));
2289 /* Expect more ACKs to arrive */
2293 LOG(GNUNET_ERROR_TYPE_DEBUG, "Message full ACK'ed\n",
2294 (unsigned int ) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2295 GNUNET_a2s (addr, fromlen));
2297 /* Remove fragmented message after successful sending */
2298 fragmented_message_done (s->frag_ctx, GNUNET_OK);
2303 read_process_fragment (struct Plugin *plugin,
2304 const struct GNUNET_MessageHeader *msg,
2305 const struct sockaddr *addr,
2308 struct DefragContext *d_ctx;
2309 struct GNUNET_TIME_Absolute now;
2310 struct FindReceiveContext frc;
2314 frc.addr_len = fromlen;
2316 LOG(GNUNET_ERROR_TYPE_DEBUG, "UDP processes %u-byte fragment from `%s'\n",
2317 (unsigned int ) ntohs (msg->size), GNUNET_a2s (addr, fromlen));
2318 /* Lookup existing receive context for this address */
2319 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
2320 &find_receive_context, &frc);
2321 now = GNUNET_TIME_absolute_get ();
2326 /* Create a new defragmentation context */
2327 d_ctx = GNUNET_malloc (sizeof (struct DefragContext) + fromlen);
2328 memcpy (&d_ctx[1], addr, fromlen);
2329 d_ctx->src_addr = (const struct sockaddr *) &d_ctx[1];
2330 d_ctx->addr_len = fromlen;
2331 d_ctx->plugin = plugin;
2332 d_ctx->defrag = GNUNET_DEFRAGMENT_context_create (plugin->env->stats,
2333 UDP_MTU, UDP_MAX_MESSAGES_IN_DEFRAG, d_ctx, &fragment_msg_proc,
2335 d_ctx->hnode = GNUNET_CONTAINER_heap_insert (plugin->defrag_ctxs, d_ctx,
2336 (GNUNET_CONTAINER_HeapCostType) now.abs_value_us);
2337 LOG(GNUNET_ERROR_TYPE_DEBUG,
2338 "Created new defragmentation context for %u-byte fragment from `%s'\n",
2339 (unsigned int ) ntohs (msg->size), GNUNET_a2s (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), GNUNET_a2s (addr, fromlen));
2348 if (GNUNET_OK == GNUNET_DEFRAGMENT_process_fragment (d_ctx->defrag, msg))
2350 /* keep this 'rc' from expiring */
2351 GNUNET_CONTAINER_heap_update_cost (plugin->defrag_ctxs, d_ctx->hnode,
2352 (GNUNET_CONTAINER_HeapCostType) now.abs_value_us);
2354 if (GNUNET_CONTAINER_heap_get_size (plugin->defrag_ctxs) >
2355 UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
2357 /* remove 'rc' that was inactive the longest */
2358 d_ctx = GNUNET_CONTAINER_heap_remove_root (plugin->defrag_ctxs);
2359 GNUNET_assert(NULL != d_ctx);
2360 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
2367 * Read and process a message from the given socket.
2369 * @param plugin the overall plugin
2370 * @param rsock socket to read from
2373 udp_select_read (struct Plugin *plugin,
2374 struct GNUNET_NETWORK_Handle *rsock)
2377 struct sockaddr_storage addr;
2378 char buf[65536] GNUNET_ALIGN;
2380 const struct GNUNET_MessageHeader *msg;
2382 fromlen = sizeof(addr);
2383 memset (&addr, 0, sizeof(addr));
2384 size = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof(buf),
2385 (struct sockaddr *) &addr, &fromlen);
2387 /* On SOCK_DGRAM UDP sockets recvfrom might fail with a
2388 * WSAECONNRESET error to indicate that previous sendto() (yes, sendto!)
2389 * on this socket has failed.
2391 * WSAECONNRESET - The virtual circuit was reset by the remote side
2392 * executing a hard or abortive close. The application should close
2393 * the socket; it is no longer usable. On a UDP-datagram socket this
2394 * error indicates a previous send operation resulted in an ICMP Port
2395 * Unreachable message.
2397 if ( (-1 == size) && (ECONNRESET == errno) )
2402 LOG(GNUNET_ERROR_TYPE_DEBUG, "UDP failed to receive data: %s\n",
2404 /* Connection failure or something. Not a protocol violation. */
2407 if (size < sizeof(struct GNUNET_MessageHeader))
2409 LOG(GNUNET_ERROR_TYPE_WARNING,
2410 "UDP got %u bytes, which is not enough for a GNUnet message header\n",
2411 (unsigned int ) size);
2412 /* _MAY_ be a connection failure (got partial message) */
2413 /* But it _MAY_ also be that the other side uses non-GNUnet protocol. */
2417 msg = (const struct GNUNET_MessageHeader *) buf;
2419 LOG(GNUNET_ERROR_TYPE_DEBUG,
2420 "UDP received %u-byte message from `%s' type %u\n", (unsigned int ) size,
2421 GNUNET_a2s ((const struct sockaddr * ) &addr, fromlen),
2424 if (size != ntohs (msg->size))
2430 GNUNET_STATISTICS_update (plugin->env->stats, "# UDP, total, bytes, received",
2436 switch (ntohs (msg->type))
2438 case GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON:
2439 if (GNUNET_YES == plugin->enable_broadcasting_receiving)
2440 udp_broadcast_receive (plugin, buf, size, (const struct sockaddr *) &addr,
2443 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
2444 read_process_msg (plugin, msg, (const struct sockaddr *) &addr, fromlen);
2446 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
2447 read_process_ack (plugin, msg, (const struct sockaddr *) &addr, fromlen);
2449 case GNUNET_MESSAGE_TYPE_FRAGMENT:
2450 read_process_fragment (plugin, msg, (const struct sockaddr *) &addr,
2460 static struct UDP_MessageWrapper *
2461 remove_timeout_messages_and_select (struct UDP_MessageWrapper *head,
2462 struct GNUNET_NETWORK_Handle *sock)
2464 struct UDP_MessageWrapper *udpw = NULL;
2465 struct GNUNET_TIME_Relative remaining;
2468 while (udpw != NULL )
2470 /* Find messages with timeout */
2471 remaining = GNUNET_TIME_absolute_get_remaining (udpw->timeout);
2472 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2474 /* Message timed out */
2475 switch (udpw->msg_type)
2477 case UMT_MSG_UNFRAGMENTED:
2478 GNUNET_STATISTICS_update (plugin->env->stats,
2479 "# UDP, total, bytes, sent, timeout", udpw->msg_size, GNUNET_NO);
2480 GNUNET_STATISTICS_update (plugin->env->stats,
2481 "# UDP, total, messages, sent, timeout", 1, GNUNET_NO);
2482 GNUNET_STATISTICS_update (plugin->env->stats,
2483 "# UDP, unfragmented msgs, messages, sent, timeout", 1, GNUNET_NO);
2484 GNUNET_STATISTICS_update (plugin->env->stats,
2485 "# UDP, unfragmented msgs, bytes, sent, timeout",
2486 udpw->payload_size, GNUNET_NO);
2487 /* Not fragmented message */
2488 LOG(GNUNET_ERROR_TYPE_DEBUG,
2489 "Message for peer `%s' with size %u timed out\n",
2490 GNUNET_i2s (&udpw->session->target), udpw->payload_size);
2491 call_continuation (udpw, GNUNET_SYSERR);
2492 /* Remove message */
2493 dequeue (plugin, udpw);
2496 case UMT_MSG_FRAGMENTED:
2497 /* Fragmented message */
2498 GNUNET_STATISTICS_update (plugin->env->stats,
2499 "# UDP, total, bytes, sent, timeout", udpw->frag_ctx->on_wire_size,
2501 GNUNET_STATISTICS_update (plugin->env->stats,
2502 "# UDP, total, messages, sent, timeout", 1, GNUNET_NO);
2503 call_continuation (udpw, GNUNET_SYSERR);
2504 LOG(GNUNET_ERROR_TYPE_DEBUG,
2505 "Fragment for message for peer `%s' with size %u timed out\n",
2506 GNUNET_i2s (&udpw->session->target), udpw->frag_ctx->payload_size);
2508 GNUNET_STATISTICS_update (plugin->env->stats,
2509 "# UDP, fragmented msgs, messages, sent, timeout", 1, GNUNET_NO);
2510 GNUNET_STATISTICS_update (plugin->env->stats,
2511 "# UDP, fragmented msgs, bytes, sent, timeout",
2512 udpw->frag_ctx->payload_size, GNUNET_NO);
2513 /* Remove fragmented message due to timeout */
2514 fragmented_message_done (udpw->frag_ctx, GNUNET_SYSERR);
2517 GNUNET_STATISTICS_update (plugin->env->stats,
2518 "# UDP, total, bytes, sent, timeout", udpw->msg_size, GNUNET_NO);
2519 GNUNET_STATISTICS_update (plugin->env->stats,
2520 "# UDP, total, messages, sent, timeout", 1, GNUNET_NO);
2521 LOG(GNUNET_ERROR_TYPE_DEBUG,
2522 "ACK Message for peer `%s' with size %u timed out\n",
2523 GNUNET_i2s (&udpw->session->target), udpw->payload_size);
2524 call_continuation (udpw, GNUNET_SYSERR);
2525 dequeue (plugin, udpw);
2531 if (sock == plugin->sockv4)
2532 udpw = plugin->ipv4_queue_head;
2533 else if (sock == plugin->sockv6)
2534 udpw = plugin->ipv6_queue_head;
2537 GNUNET_break(0); /* should never happen */
2540 GNUNET_STATISTICS_update (plugin->env->stats,
2541 "# messages dismissed due to timeout", 1, GNUNET_NO);
2545 /* Message did not time out, check flow delay */
2546 remaining = GNUNET_TIME_absolute_get_remaining (
2547 udpw->session->flow_delay_from_other_peer);
2548 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2550 /* this message is not delayed */
2551 LOG(GNUNET_ERROR_TYPE_DEBUG,
2552 "Message for peer `%s' (%u bytes) is not delayed \n",
2553 GNUNET_i2s (&udpw->session->target), udpw->payload_size);
2554 break; /* Found message to send, break */
2558 /* Message is delayed, try next */
2559 LOG(GNUNET_ERROR_TYPE_DEBUG,
2560 "Message for peer `%s' (%u bytes) is delayed for %s\n",
2561 GNUNET_i2s (&udpw->session->target), udpw->payload_size,
2562 GNUNET_STRINGS_relative_time_to_string (remaining, GNUNET_YES));
2572 analyze_send_error (struct Plugin *plugin,
2573 const struct sockaddr *sa,
2574 socklen_t slen, int error)
2576 static int network_down_error;
2577 struct GNUNET_ATS_Information type;
2579 type = plugin->env->get_address_type (plugin->env->cls, sa, slen);
2580 if (((GNUNET_ATS_NET_LAN == ntohl (type.value))
2581 || (GNUNET_ATS_NET_WAN == ntohl (type.value)))
2582 && ((ENETUNREACH == errno)|| (ENETDOWN == errno)))
2584 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in)))
2586 /* IPv4: "Network unreachable" or "Network down"
2588 * This indicates we do not have connectivity
2590 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2591 _("UDP could not transmit message to `%s': "
2592 "Network seems down, please check your network configuration\n"),
2593 GNUNET_a2s (sa, slen));
2595 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in6)))
2597 /* IPv6: "Network unreachable" or "Network down"
2599 * This indicates that this system is IPv6 enabled, but does not
2600 * have a valid global IPv6 address assigned or we do not have
2604 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2605 _("UDP could not transmit IPv6 message! "
2606 "Please check your network configuration and disable IPv6 if your "
2607 "connection does not have a global IPv6 address\n"));
2612 LOG (GNUNET_ERROR_TYPE_WARNING,
2613 "UDP could not transmit message to `%s': `%s'\n",
2614 GNUNET_a2s (sa, slen), STRERROR (error));
2620 udp_select_send (struct Plugin *plugin,
2621 struct GNUNET_NETWORK_Handle *sock)
2626 const struct IPv4UdpAddress *u4;
2627 struct sockaddr_in a4;
2628 const struct IPv6UdpAddress *u6;
2629 struct sockaddr_in6 a6;
2630 struct UDP_MessageWrapper *udpw;
2632 /* Find message to send */
2633 udpw = remove_timeout_messages_and_select ((sock == plugin->sockv4)
2634 ? plugin->ipv4_queue_head
2635 : plugin->ipv6_queue_head,
2638 return 0; /* No message to send */
2640 if (sizeof (struct IPv4UdpAddress) == udpw->session->address->address_length)
2642 u4 = udpw->session->address->address;
2643 memset (&a4, 0, sizeof(a4));
2644 a4.sin_family = AF_INET;
2645 #if HAVE_SOCKADDR_IN_SIN_LEN
2646 a4.sin_len = sizeof (a4);
2648 a4.sin_port = u4->u4_port;
2649 memcpy (&a4.sin_addr, &u4->ipv4_addr, sizeof(struct in_addr));
2650 a = (struct sockaddr *) &a4;
2653 else if (sizeof (struct IPv6UdpAddress) == udpw->session->address->address_length)
2655 u6 = udpw->session->address->address;
2656 memset (&a6, 0, sizeof(a6));
2657 a6.sin6_family = AF_INET6;
2658 #if HAVE_SOCKADDR_IN_SIN_LEN
2659 a6.sin6_len = sizeof (a6);
2661 a6.sin6_port = u6->u6_port;
2662 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof(struct in6_addr));
2663 a = (struct sockaddr *) &a6;
2668 call_continuation (udpw, GNUNET_OK);
2669 dequeue (plugin, udpw);
2671 return GNUNET_SYSERR;
2674 sent = GNUNET_NETWORK_socket_sendto (sock, udpw->msg_buf, udpw->msg_size, a,
2677 if (GNUNET_SYSERR == sent)
2680 analyze_send_error (plugin, a, slen, errno);
2681 call_continuation (udpw, GNUNET_SYSERR);
2682 GNUNET_STATISTICS_update (plugin->env->stats,
2683 "# UDP, total, bytes, sent, failure", sent, GNUNET_NO);
2684 GNUNET_STATISTICS_update (plugin->env->stats,
2685 "# UDP, total, messages, sent, failure", 1, GNUNET_NO);
2690 LOG(GNUNET_ERROR_TYPE_DEBUG,
2691 "UDP transmitted %u-byte message to `%s' `%s' (%d: %s)\n",
2692 (unsigned int ) (udpw->msg_size), GNUNET_i2s (&udpw->session->target),
2693 GNUNET_a2s (a, slen), (int ) sent,
2694 (sent < 0) ? STRERROR (errno) : "ok");
2695 GNUNET_STATISTICS_update (plugin->env->stats,
2696 "# UDP, total, bytes, sent, success", sent, GNUNET_NO);
2697 GNUNET_STATISTICS_update (plugin->env->stats,
2698 "# UDP, total, messages, sent, success", 1, GNUNET_NO);
2699 if (NULL != udpw->frag_ctx)
2700 udpw->frag_ctx->on_wire_size += udpw->msg_size;
2701 call_continuation (udpw, GNUNET_OK);
2703 dequeue (plugin, udpw);
2712 * We have been notified that our readset has something to read. We don't
2713 * know which socket needs to be read, so we have to check each one
2714 * Then reschedule this function to be called again once more is available.
2716 * @param cls the plugin handle
2717 * @param tc the scheduling context (for rescheduling this function again)
2720 udp_plugin_select (void *cls,
2721 const struct GNUNET_SCHEDULER_TaskContext *tc)
2723 struct Plugin *plugin = cls;
2725 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
2726 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2728 if ((0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
2729 && (NULL != plugin->sockv4)
2730 && (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv4)))
2731 udp_select_read (plugin, plugin->sockv4);
2732 if ((0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY))
2733 && (NULL != plugin->sockv4) && (NULL != plugin->ipv4_queue_head)
2734 && (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv4)))
2735 udp_select_send (plugin, plugin->sockv4);
2736 schedule_select (plugin);
2741 * We have been notified that our readset has something to read. We don't
2742 * know which socket needs to be read, so we have to check each one
2743 * Then reschedule this function to be called again once more is available.
2745 * @param cls the plugin handle
2746 * @param tc the scheduling context (for rescheduling this function again)
2749 udp_plugin_select_v6 (void *cls,
2750 const struct GNUNET_SCHEDULER_TaskContext *tc)
2752 struct Plugin *plugin = cls;
2754 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2755 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2757 if (((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0)
2758 && (NULL != plugin->sockv6)
2759 && (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv6)))
2760 udp_select_read (plugin, plugin->sockv6);
2761 if ((0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY))
2762 && (NULL != plugin->sockv6) && (plugin->ipv6_queue_head != NULL )&&
2763 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv6)) )udp_select_send (plugin, plugin->sockv6);
2764 schedule_select (plugin);
2769 * Setup the UDP sockets (for IPv4 and IPv6) for the plugin.
2771 * @param plugin the plugin to initialize
2772 * @param bind_v6 IPv6 address to bind to (can be NULL, for 'any')
2773 * @param bind_v4 IPv4 address to bind to (can be NULL, for 'any')
2774 * @return number of sockets that were successfully bound
2777 setup_sockets (struct Plugin *plugin,
2778 const struct sockaddr_in6 *bind_v6,
2779 const struct sockaddr_in *bind_v4)
2782 int sockets_created = 0;
2783 struct sockaddr_in6 server_addrv6;
2784 struct sockaddr_in server_addrv4;
2785 struct sockaddr *server_addr;
2786 struct sockaddr *addrs[2];
2787 socklen_t addrlens[2];
2791 /* Create IPv6 socket */
2793 if (GNUNET_YES == plugin->enable_ipv6)
2795 plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
2796 if (NULL == plugin->sockv6)
2798 LOG(GNUNET_ERROR_TYPE_WARNING,
2799 "Disabling IPv6 since it is not supported on this system!\n");
2800 plugin->enable_ipv6 = GNUNET_NO;
2804 memset (&server_addrv6, '\0', sizeof(struct sockaddr_in6));
2805 #if HAVE_SOCKADDR_IN_SIN_LEN
2806 server_addrv6.sin6_len = sizeof (struct sockaddr_in6);
2808 server_addrv6.sin6_family = AF_INET6;
2809 if (NULL != bind_v6)
2810 server_addrv6.sin6_addr = bind_v6->sin6_addr;
2812 server_addrv6.sin6_addr = in6addr_any;
2814 if (0 == plugin->port) /* autodetect */
2815 server_addrv6.sin6_port = htons (
2816 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537)
2819 server_addrv6.sin6_port = htons (plugin->port);
2820 addrlen = sizeof(struct sockaddr_in6);
2821 server_addr = (struct sockaddr *) &server_addrv6;
2826 LOG(GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv6 `%s'\n",
2827 GNUNET_a2s (server_addr, addrlen));
2830 == GNUNET_NETWORK_socket_bind (plugin->sockv6, server_addr,
2834 if (0 != plugin->port)
2836 tries = 10; /* fail */
2837 break; /* bind failed on specific port */
2840 server_addrv6.sin6_port = htons (
2841 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537)
2847 GNUNET_NETWORK_socket_close (plugin->sockv6);
2848 plugin->enable_ipv6 = GNUNET_NO;
2849 plugin->sockv6 = NULL;
2852 if (plugin->sockv6 != NULL )
2854 LOG(GNUNET_ERROR_TYPE_DEBUG, "IPv6 socket created on port %s\n",
2855 GNUNET_a2s (server_addr, addrlen));
2856 addrs[sockets_created] = (struct sockaddr *) &server_addrv6;
2857 addrlens[sockets_created] = sizeof(struct sockaddr_in6);
2862 LOG(GNUNET_ERROR_TYPE_ERROR, "Failed to bind UDP socket to %s: %s\n",
2863 GNUNET_a2s (server_addr, addrlen), STRERROR (eno));
2868 /* Create IPv4 socket */
2870 plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
2871 if (NULL == plugin->sockv4)
2873 GNUNET_log_strerror(GNUNET_ERROR_TYPE_WARNING, "socket");
2874 LOG(GNUNET_ERROR_TYPE_WARNING,
2875 "Disabling IPv4 since it is not supported on this system!\n");
2876 plugin->enable_ipv4 = GNUNET_NO;
2880 memset (&server_addrv4, '\0', sizeof(struct sockaddr_in));
2881 #if HAVE_SOCKADDR_IN_SIN_LEN
2882 server_addrv4.sin_len = sizeof (struct sockaddr_in);
2884 server_addrv4.sin_family = AF_INET;
2885 if (NULL != bind_v4)
2886 server_addrv4.sin_addr = bind_v4->sin_addr;
2888 server_addrv4.sin_addr.s_addr = INADDR_ANY;
2890 if (0 == plugin->port)
2892 server_addrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG,
2896 server_addrv4.sin_port = htons (plugin->port);
2898 addrlen = sizeof(struct sockaddr_in);
2899 server_addr = (struct sockaddr *) &server_addrv4;
2904 LOG (GNUNET_ERROR_TYPE_DEBUG,
2905 "Binding to IPv4 `%s'\n",
2906 GNUNET_a2s (server_addr, addrlen));
2910 == GNUNET_NETWORK_socket_bind (plugin->sockv4, server_addr, addrlen))
2913 if (0 != plugin->port)
2915 tries = 10; /* fail */
2916 break; /* bind failed on specific port */
2920 server_addrv4.sin_port = htons (
2921 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537)
2928 GNUNET_NETWORK_socket_close (plugin->sockv4);
2929 plugin->enable_ipv4 = GNUNET_NO;
2930 plugin->sockv4 = NULL;
2933 if (NULL != plugin->sockv4)
2935 LOG(GNUNET_ERROR_TYPE_DEBUG, "IPv4 socket created on port %s\n",
2936 GNUNET_a2s (server_addr, addrlen));
2937 addrs[sockets_created] = (struct sockaddr *) &server_addrv4;
2938 addrlens[sockets_created] = sizeof(struct sockaddr_in);
2943 LOG(GNUNET_ERROR_TYPE_ERROR, "Failed to bind UDP socket to %s: %s\n",
2944 GNUNET_a2s (server_addr, addrlen), STRERROR (eno));
2948 if (0 == sockets_created)
2950 LOG(GNUNET_ERROR_TYPE_WARNING, _("Failed to open UDP sockets\n"));
2951 return 0; /* No sockets created, return */
2954 /* Create file descriptors */
2955 if (plugin->enable_ipv4 == GNUNET_YES)
2957 plugin->rs_v4 = GNUNET_NETWORK_fdset_create ();
2958 plugin->ws_v4 = GNUNET_NETWORK_fdset_create ();
2959 GNUNET_NETWORK_fdset_zero (plugin->rs_v4);
2960 GNUNET_NETWORK_fdset_zero (plugin->ws_v4);
2961 if (NULL != plugin->sockv4)
2963 GNUNET_NETWORK_fdset_set (plugin->rs_v4, plugin->sockv4);
2964 GNUNET_NETWORK_fdset_set (plugin->ws_v4, plugin->sockv4);
2968 if (plugin->enable_ipv6 == GNUNET_YES)
2970 plugin->rs_v6 = GNUNET_NETWORK_fdset_create ();
2971 plugin->ws_v6 = GNUNET_NETWORK_fdset_create ();
2972 GNUNET_NETWORK_fdset_zero (plugin->rs_v6);
2973 GNUNET_NETWORK_fdset_zero (plugin->ws_v6);
2974 if (NULL != plugin->sockv6)
2976 GNUNET_NETWORK_fdset_set (plugin->rs_v6, plugin->sockv6);
2977 GNUNET_NETWORK_fdset_set (plugin->ws_v6, plugin->sockv6);
2981 schedule_select (plugin);
2982 plugin->nat = GNUNET_NAT_register (plugin->env->cfg, GNUNET_NO, plugin->port,
2984 (const struct sockaddr **) addrs, addrlens,
2985 &udp_nat_port_map_callback, NULL, plugin);
2987 return sockets_created;
2992 * The exported method. Makes the core api available via a global and
2993 * returns the udp transport API.
2995 * @param cls our `struct GNUNET_TRANSPORT_PluginEnvironment`
2996 * @return our `struct GNUNET_TRANSPORT_PluginFunctions`
2999 libgnunet_plugin_transport_udp_init (void *cls)
3001 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
3002 struct GNUNET_TRANSPORT_PluginFunctions *api;
3004 unsigned long long port;
3005 unsigned long long aport;
3006 unsigned long long udp_max_bps;
3007 unsigned long long enable_v6;
3008 unsigned long long enable_broadcasting;
3009 unsigned long long enable_broadcasting_recv;
3010 char *bind4_address;
3011 char *bind6_address;
3012 char *fancy_interval;
3013 struct GNUNET_TIME_Relative interval;
3014 struct sockaddr_in server_addrv4;
3015 struct sockaddr_in6 server_addrv6;
3020 if (NULL == env->receive)
3022 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
3023 initialze the plugin or the API */
3024 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
3026 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3027 api->address_to_string = &udp_address_to_string;
3028 api->string_to_address = &udp_string_to_address;
3032 /* Get port number: port == 0 : autodetect a port,
3033 * > 0 : use this port, not given : 2086 default */
3035 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3039 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3040 "ADVERTISED_PORT", &aport))
3044 LOG (GNUNET_ERROR_TYPE_WARNING,
3045 _("Given `%s' option is out of range: %llu > %u\n"),
3053 GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "nat", "DISABLEV6"))
3054 enable_v6 = GNUNET_NO;
3056 enable_v6 = GNUNET_YES;
3059 have_bind4 = GNUNET_NO;
3060 memset (&server_addrv4, 0, sizeof(server_addrv4));
3061 if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3062 "BINDTO", &bind4_address))
3064 LOG (GNUNET_ERROR_TYPE_DEBUG,
3065 "Binding udp plugin to specific address: `%s'\n",
3067 if (1 != inet_pton (AF_INET, bind4_address, &server_addrv4.sin_addr))
3069 GNUNET_free (bind4_address);
3072 have_bind4 = GNUNET_YES;
3074 GNUNET_free_non_null(bind4_address);
3075 have_bind6 = GNUNET_NO;
3076 memset (&server_addrv6, 0, sizeof(server_addrv6));
3078 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3079 "BINDTO6", &bind6_address))
3081 LOG (GNUNET_ERROR_TYPE_DEBUG,
3082 "Binding udp plugin to specific address: `%s'\n", bind6_address);
3083 if (1 != inet_pton (AF_INET6, bind6_address, &server_addrv6.sin6_addr))
3085 LOG (GNUNET_ERROR_TYPE_ERROR,
3086 _("Invalid IPv6 address: `%s'\n"),
3088 GNUNET_free (bind6_address);
3091 have_bind6 = GNUNET_YES;
3093 GNUNET_free_non_null (bind6_address);
3095 /* Initialize my flags */
3098 /* Enable neighbour discovery */
3099 enable_broadcasting = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
3100 "transport-udp", "BROADCAST");
3101 if (enable_broadcasting == GNUNET_SYSERR)
3102 enable_broadcasting = GNUNET_NO;
3104 enable_broadcasting_recv = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
3105 "transport-udp", "BROADCAST_RECEIVE");
3106 if (enable_broadcasting_recv == GNUNET_SYSERR)
3107 enable_broadcasting_recv = GNUNET_YES;
3110 == GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3111 "BROADCAST_INTERVAL", &fancy_interval))
3113 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
3118 == GNUNET_STRINGS_fancy_time_to_relative (fancy_interval, &interval))
3120 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30);
3122 GNUNET_free(fancy_interval);
3125 /* Maximum datarate */
3127 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3128 "MAX_BPS", &udp_max_bps))
3130 udp_max_bps = 1024 * 1024 * 50; /* 50 MB/s == infinity for practical purposes */
3133 p = GNUNET_new (struct Plugin);
3136 p->broadcast_interval = interval;
3137 p->enable_ipv6 = enable_v6;
3138 p->enable_ipv4 = GNUNET_YES; /* default */
3139 p->enable_broadcasting = enable_broadcasting;
3140 p->enable_broadcasting_receiving = enable_broadcasting_recv;
3142 p->sessions = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
3143 p->defrag_ctxs = GNUNET_CONTAINER_heap_create (
3144 GNUNET_CONTAINER_HEAP_ORDER_MIN);
3145 p->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages, p);
3146 GNUNET_BANDWIDTH_tracker_init (&p->tracker, NULL, NULL,
3147 GNUNET_BANDWIDTH_value_init ((uint32_t) udp_max_bps), 30);
3150 LOG(GNUNET_ERROR_TYPE_DEBUG, "Setting up sockets\n");
3151 res = setup_sockets (p,
3152 (GNUNET_YES == have_bind6) ? &server_addrv6 : NULL,
3153 (GNUNET_YES == have_bind4) ? &server_addrv4 : NULL);
3154 if ((res == 0) || ((p->sockv4 == NULL )&& (p->sockv6 == NULL)))
3156 LOG (GNUNET_ERROR_TYPE_ERROR,
3157 _("Failed to create network sockets, plugin failed\n"));
3158 GNUNET_CONTAINER_multipeermap_destroy (p->sessions);
3159 GNUNET_CONTAINER_heap_destroy (p->defrag_ctxs);
3160 GNUNET_SERVER_mst_destroy (p->mst);
3165 /* Setup broadcasting and receiving beacons */
3166 setup_broadcast (p, &server_addrv6, &server_addrv4);
3168 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
3171 api->disconnect_session = &udp_disconnect_session;
3172 api->query_keepalive_factor = &udp_query_keepalive_factor;
3173 api->disconnect_peer = &udp_disconnect;
3174 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3175 api->address_to_string = &udp_address_to_string;
3176 api->string_to_address = &udp_string_to_address;
3177 api->check_address = &udp_plugin_check_address;
3178 api->get_session = &udp_plugin_get_session;
3179 api->send = &udp_plugin_send;
3180 api->get_network = &udp_get_network;
3181 api->update_session_timeout = &udp_plugin_update_session_timeout;
3187 * Function called on each entry in the defragmentation heap to
3191 * @param node node in the heap (to be removed)
3192 * @param element a `struct DefragContext` to be cleaned up
3193 * @param cost unused
3194 * @return #GNUNET_YES
3197 heap_cleanup_iterator (void *cls,
3198 struct GNUNET_CONTAINER_HeapNode *node,
3200 GNUNET_CONTAINER_HeapCostType cost)
3202 struct DefragContext *d_ctx = element;
3204 GNUNET_CONTAINER_heap_remove_node (node);
3205 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
3206 GNUNET_free (d_ctx);
3212 * The exported method. Makes the core api available via a global and
3213 * returns the udp transport API.
3215 * @param cls our `struct GNUNET_TRANSPORT_PluginEnvironment`
3219 libgnunet_plugin_transport_udp_done (void *cls)
3221 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
3222 struct Plugin *plugin = api->cls;
3223 struct PrettyPrinterContext *cur;
3224 struct PrettyPrinterContext *next;
3225 struct UDP_MessageWrapper *udpw;
3232 stop_broadcast (plugin);
3233 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK )
3235 GNUNET_SCHEDULER_cancel (plugin->select_task);
3236 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
3238 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK )
3240 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
3241 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
3244 /* Closing sockets */
3245 if (GNUNET_YES == plugin->enable_ipv4)
3247 if (NULL != plugin->sockv4)
3249 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
3250 plugin->sockv4 = NULL;
3252 GNUNET_NETWORK_fdset_destroy (plugin->rs_v4);
3253 GNUNET_NETWORK_fdset_destroy (plugin->ws_v4);
3255 if (GNUNET_YES == plugin->enable_ipv6)
3257 if (NULL != plugin->sockv6)
3259 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
3260 plugin->sockv6 = NULL;
3262 GNUNET_NETWORK_fdset_destroy (plugin->rs_v6);
3263 GNUNET_NETWORK_fdset_destroy (plugin->ws_v6);
3266 if (NULL != plugin->nat)
3268 GNUNET_NAT_unregister (plugin->nat);
3271 if (NULL != plugin->defrag_ctxs)
3273 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
3274 &heap_cleanup_iterator, NULL);
3275 GNUNET_CONTAINER_heap_destroy (plugin->defrag_ctxs);
3276 plugin->defrag_ctxs = NULL;
3278 if (NULL != plugin->mst)
3280 GNUNET_SERVER_mst_destroy (plugin->mst);
3284 /* Clean up leftover messages */
3285 udpw = plugin->ipv4_queue_head;
3286 while (NULL != udpw)
3288 struct UDP_MessageWrapper *tmp = udpw->next;
3289 dequeue (plugin, udpw);
3290 call_continuation (udpw, GNUNET_SYSERR);
3294 udpw = plugin->ipv6_queue_head;
3295 while (NULL != udpw)
3297 struct UDP_MessageWrapper *tmp = udpw->next;
3298 dequeue (plugin, udpw);
3299 call_continuation (udpw, GNUNET_SYSERR);
3304 /* Clean up sessions */
3305 LOG (GNUNET_ERROR_TYPE_DEBUG,
3306 "Cleaning up sessions\n");
3307 GNUNET_CONTAINER_multipeermap_iterate (plugin->sessions,
3308 &disconnect_and_free_it, plugin);
3309 GNUNET_CONTAINER_multipeermap_destroy (plugin->sessions);
3311 next = ppc_dll_head;
3312 for (cur = next; NULL != cur; cur = next)
3316 GNUNET_CONTAINER_DLL_remove (ppc_dll_head,
3319 GNUNET_RESOLVER_request_cancel (cur->resolver_handle);
3322 GNUNET_free (plugin);
3327 /* end of plugin_transport_udp.c */