2 This file is part of GNUnet
3 (C) 2010-2014 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
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
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.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
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 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 ppc_cancel_task (void *cls,
722 const struct GNUNET_SCHEDULER_TaskContext *tc)
724 struct PrettyPrinterContext *ppc = cls;
726 ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
727 if (NULL != ppc->resolver_handle)
729 GNUNET_RESOLVER_request_cancel (ppc->resolver_handle);
730 ppc->resolver_handle = NULL;
732 GNUNET_CONTAINER_DLL_remove(ppc_dll_head, ppc_dll_tail, ppc);
738 * Append our port and forward the result.
740 * @param cls a 'struct PrettyPrinterContext'
741 * @param hostname result from DNS resolver
744 append_port (void *cls, const char *hostname)
746 struct PrettyPrinterContext *ppc = cls;
747 struct PrettyPrinterContext *cur;
750 if (hostname == NULL )
752 ppc->asc (ppc->asc_cls, NULL );
753 GNUNET_CONTAINER_DLL_remove(ppc_dll_head, ppc_dll_tail, ppc);
754 GNUNET_SCHEDULER_cancel (ppc->timeout_task);
755 ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
756 ppc->resolver_handle = NULL;
760 for (cur = ppc_dll_head; (NULL != cur); cur = cur->next)
767 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Invalid callback for PPC %p \n", ppc);
771 if (GNUNET_YES == ppc->ipv6)
772 GNUNET_asprintf (&ret, "%s.%u.[%s]:%d", PLUGIN_NAME, ppc->options, hostname,
775 GNUNET_asprintf (&ret, "%s.%u.%s:%d", PLUGIN_NAME, ppc->options, hostname,
777 ppc->asc (ppc->asc_cls, ret);
783 * Convert the transports address to a nice, human-readable
787 * @param type name of the transport that generated the address
788 * @param addr one of the addresses of the host, NULL for the last address
789 * the specific address format depends on the transport
790 * @param addrlen length of the address
791 * @param numeric should (IP) addresses be displayed in numeric form?
792 * @param timeout after how long should we give up?
793 * @param asc function to call on each string
794 * @param asc_cls closure for @a asc
797 udp_plugin_address_pretty_printer (void *cls,
802 struct GNUNET_TIME_Relative timeout,
803 GNUNET_TRANSPORT_AddressStringCallback asc,
806 struct PrettyPrinterContext *ppc;
809 struct sockaddr_in a4;
810 struct sockaddr_in6 a6;
811 const struct IPv4UdpAddress *u4;
812 const struct IPv6UdpAddress *u6;
816 if (addrlen == sizeof(struct IPv6UdpAddress))
819 memset (&a6, 0, sizeof(a6));
820 a6.sin6_family = AF_INET6;
821 #if HAVE_SOCKADDR_IN_SIN_LEN
822 a6.sin6_len = sizeof (a6);
824 a6.sin6_port = u6->u6_port;
825 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof(struct in6_addr));
826 port = ntohs (u6->u6_port);
827 options = ntohl (u6->options);
831 else if (addrlen == sizeof(struct IPv4UdpAddress))
834 memset (&a4, 0, sizeof(a4));
835 a4.sin_family = AF_INET;
836 #if HAVE_SOCKADDR_IN_SIN_LEN
837 a4.sin_len = sizeof (a4);
839 a4.sin_port = u4->u4_port;
840 a4.sin_addr.s_addr = u4->ipv4_addr;
841 port = ntohs (u4->u4_port);
842 options = ntohl (u4->options);
848 /* invalid address */
850 asc (asc_cls, NULL );
853 ppc = GNUNET_new (struct PrettyPrinterContext);
855 ppc->asc_cls = asc_cls;
857 ppc->options = options;
858 if (addrlen == sizeof(struct IPv6UdpAddress))
859 ppc->ipv6 = GNUNET_YES;
861 ppc->ipv6 = GNUNET_NO;
862 ppc->timeout_task = GNUNET_SCHEDULER_add_delayed (
863 GNUNET_TIME_relative_multiply (timeout, 2), &ppc_cancel_task, ppc);
864 GNUNET_CONTAINER_DLL_insert(ppc_dll_head, ppc_dll_tail, ppc);
865 ppc->resolver_handle = GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric,
866 timeout, &append_port, ppc);
871 call_continuation (struct UDP_MessageWrapper *udpw,
876 LOG (GNUNET_ERROR_TYPE_DEBUG,
877 "Calling continuation for %u byte message to `%s' with result %s\n",
878 udpw->payload_size, GNUNET_i2s (&udpw->session->target),
879 (GNUNET_OK == result) ? "OK" : "SYSERR");
881 if (udpw->msg_size >= udpw->payload_size)
882 overhead = udpw->msg_size - udpw->payload_size;
884 overhead = udpw->msg_size;
889 switch (udpw->msg_type)
891 case UMT_MSG_UNFRAGMENTED:
892 if (NULL != udpw->cont)
894 /* Transport continuation */
895 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
896 udpw->payload_size, udpw->msg_size);
898 GNUNET_STATISTICS_update (plugin->env->stats,
899 "# UDP, unfragmented msgs, messages, sent, success", 1, GNUNET_NO);
900 GNUNET_STATISTICS_update (plugin->env->stats,
901 "# UDP, unfragmented msgs, bytes payload, sent, success",
902 udpw->payload_size, GNUNET_NO);
903 GNUNET_STATISTICS_update (plugin->env->stats,
904 "# UDP, unfragmented msgs, bytes overhead, sent, success", overhead,
906 GNUNET_STATISTICS_update (plugin->env->stats,
907 "# UDP, total, bytes overhead, sent", overhead, GNUNET_NO);
908 GNUNET_STATISTICS_update (plugin->env->stats,
909 "# UDP, total, bytes payload, sent", udpw->payload_size, GNUNET_NO);
911 case UMT_MSG_FRAGMENTED_COMPLETE:
912 GNUNET_assert(NULL != udpw->frag_ctx);
913 if (udpw->frag_ctx->cont != NULL )
914 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target,
915 GNUNET_OK, udpw->frag_ctx->payload_size,
916 udpw->frag_ctx->on_wire_size);
917 GNUNET_STATISTICS_update (plugin->env->stats,
918 "# UDP, fragmented msgs, messages, sent, success", 1, GNUNET_NO);
919 GNUNET_STATISTICS_update (plugin->env->stats,
920 "# UDP, fragmented msgs, bytes payload, sent, success",
921 udpw->payload_size, GNUNET_NO);
922 GNUNET_STATISTICS_update (plugin->env->stats,
923 "# UDP, fragmented msgs, bytes overhead, sent, success", overhead,
925 GNUNET_STATISTICS_update (plugin->env->stats,
926 "# UDP, total, bytes overhead, sent", overhead, GNUNET_NO);
927 GNUNET_STATISTICS_update (plugin->env->stats,
928 "# UDP, total, bytes payload, sent", udpw->payload_size, GNUNET_NO);
929 GNUNET_STATISTICS_update (plugin->env->stats,
930 "# UDP, fragmented msgs, messages, pending", -1, GNUNET_NO);
932 case UMT_MSG_FRAGMENTED:
933 /* Fragmented message: enqueue next fragment */
934 if (NULL != udpw->cont)
935 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
936 udpw->payload_size, udpw->msg_size);
937 GNUNET_STATISTICS_update (plugin->env->stats,
938 "# UDP, fragmented msgs, fragments, sent, success", 1, GNUNET_NO);
939 GNUNET_STATISTICS_update (plugin->env->stats,
940 "# UDP, fragmented msgs, fragments bytes, sent, success",
941 udpw->msg_size, GNUNET_NO);
944 /* No continuation */
945 GNUNET_STATISTICS_update (plugin->env->stats,
946 "# UDP, ACK msgs, messages, sent, success", 1, GNUNET_NO);
947 GNUNET_STATISTICS_update (plugin->env->stats,
948 "# UDP, ACK msgs, bytes overhead, sent, success", overhead,
950 GNUNET_STATISTICS_update (plugin->env->stats,
951 "# UDP, total, bytes overhead, sent", overhead, GNUNET_NO);
959 switch (udpw->msg_type)
961 case UMT_MSG_UNFRAGMENTED:
962 /* Unfragmented message: failed to send */
963 if (NULL != udpw->cont)
964 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
965 udpw->payload_size, overhead);
966 GNUNET_STATISTICS_update (plugin->env->stats,
967 "# UDP, unfragmented msgs, messages, sent, failure", 1, GNUNET_NO);
968 GNUNET_STATISTICS_update (plugin->env->stats,
969 "# UDP, unfragmented msgs, bytes payload, sent, failure",
970 udpw->payload_size, GNUNET_NO);
971 GNUNET_STATISTICS_update (plugin->env->stats,
972 "# UDP, unfragmented msgs, bytes overhead, sent, failure", overhead,
975 case UMT_MSG_FRAGMENTED_COMPLETE:
976 GNUNET_assert(NULL != udpw->frag_ctx);
977 if (udpw->frag_ctx->cont != NULL )
978 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target,
979 GNUNET_SYSERR, udpw->frag_ctx->payload_size,
980 udpw->frag_ctx->on_wire_size);
981 GNUNET_STATISTICS_update (plugin->env->stats,
982 "# UDP, fragmented msgs, messages, sent, failure", 1, GNUNET_NO);
983 GNUNET_STATISTICS_update (plugin->env->stats,
984 "# UDP, fragmented msgs, bytes payload, sent, failure",
985 udpw->payload_size, GNUNET_NO);
986 GNUNET_STATISTICS_update (plugin->env->stats,
987 "# UDP, fragmented msgs, bytes payload, sent, failure", overhead,
989 GNUNET_STATISTICS_update (plugin->env->stats,
990 "# UDP, fragmented msgs, bytes payload, sent, failure", overhead,
992 GNUNET_STATISTICS_update (plugin->env->stats,
993 "# UDP, fragmented msgs, messages, pending", -1, GNUNET_NO);
995 case UMT_MSG_FRAGMENTED:
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", 1, GNUNET_NO);
1000 GNUNET_STATISTICS_update (plugin->env->stats,
1001 "# UDP, fragmented msgs, fragments bytes, sent, failure",
1002 udpw->msg_size, GNUNET_NO);
1005 /* ACK message: failed to send */
1006 GNUNET_STATISTICS_update (plugin->env->stats,
1007 "# UDP, ACK msgs, messages, sent, failure", 1, GNUNET_NO);
1022 * Check if the given port is plausible (must be either our listen
1023 * port or our advertised port). If it is neither, we return
1026 * @param plugin global variables
1027 * @param in_port port number to check
1028 * @return #GNUNET_OK if port is either open_port or adv_port
1031 check_port (struct Plugin *plugin, uint16_t in_port)
1033 if ((in_port == plugin->port) || (in_port == plugin->aport))
1035 return GNUNET_SYSERR;
1040 * Function that will be called to check if a binary address for this
1041 * plugin is well-formed and corresponds to an address for THIS peer
1042 * (as per our configuration). Naturally, if absolutely necessary,
1043 * plugins can be a bit conservative in their answer, but in general
1044 * plugins should make sure that the address does not redirect
1045 * traffic to a 3rd party that might try to man-in-the-middle our
1048 * @param cls closure, should be our handle to the Plugin
1049 * @param addr pointer to the address
1050 * @param addrlen length of @a addr
1051 * @return #GNUNET_OK if this is a plausible address for this peer
1052 * and transport, #GNUNET_SYSERR if not
1056 udp_plugin_check_address (void *cls, const void *addr, size_t addrlen)
1058 struct Plugin *plugin = cls;
1059 struct IPv4UdpAddress *v4;
1060 struct IPv6UdpAddress *v6;
1062 if ((addrlen != sizeof(struct IPv4UdpAddress))
1063 && (addrlen != sizeof(struct IPv6UdpAddress)))
1066 return GNUNET_SYSERR;
1068 if (addrlen == sizeof(struct IPv4UdpAddress))
1070 v4 = (struct IPv4UdpAddress *) addr;
1071 if (GNUNET_OK != check_port (plugin, ntohs (v4->u4_port)))
1072 return GNUNET_SYSERR;
1074 != GNUNET_NAT_test_address (plugin->nat, &v4->ipv4_addr,
1075 sizeof(struct in_addr)))
1076 return GNUNET_SYSERR;
1080 v6 = (struct IPv6UdpAddress *) addr;
1081 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1084 return GNUNET_SYSERR;
1086 if (GNUNET_OK != check_port (plugin, ntohs (v6->u6_port)))
1087 return GNUNET_SYSERR;
1089 != GNUNET_NAT_test_address (plugin->nat, &v6->ipv6_addr,
1090 sizeof(struct in6_addr)))
1091 return GNUNET_SYSERR;
1098 * Function to free last resources associated with a session.
1100 * @param s session to free
1103 free_session (struct Session *s)
1105 if (NULL != s->frag_ctx)
1107 GNUNET_FRAGMENT_context_destroy (s->frag_ctx->frag, NULL, NULL );
1108 GNUNET_free(s->frag_ctx);
1116 dequeue (struct Plugin *plugin,
1117 struct UDP_MessageWrapper * udpw)
1119 if (plugin->bytes_in_buffer < udpw->msg_size)
1123 GNUNET_STATISTICS_update (plugin->env->stats,
1124 "# UDP, total, bytes in buffers", -(long long) udpw->msg_size,
1126 plugin->bytes_in_buffer -= udpw->msg_size;
1128 GNUNET_STATISTICS_update (plugin->env->stats, "# UDP, total, msgs in buffers",
1130 if (udpw->session->address->address_length == sizeof(struct IPv4UdpAddress))
1131 GNUNET_CONTAINER_DLL_remove(plugin->ipv4_queue_head,
1132 plugin->ipv4_queue_tail, udpw);
1133 else if (udpw->session->address->address_length == sizeof(struct IPv6UdpAddress))
1134 GNUNET_CONTAINER_DLL_remove(plugin->ipv6_queue_head,
1135 plugin->ipv6_queue_tail, udpw);
1142 fragmented_message_done (struct UDP_FragmentationContext *fc,
1145 struct UDP_MessageWrapper *udpw;
1146 struct UDP_MessageWrapper *tmp;
1147 struct UDP_MessageWrapper dummy;
1148 struct Session *s = fc->session;
1150 LOG(GNUNET_ERROR_TYPE_DEBUG,
1151 "%p : Fragmented message removed with result %s\n", fc,
1152 (result == GNUNET_SYSERR) ? "FAIL" : "SUCCESS");
1154 /* Call continuation for fragmented message */
1155 memset (&dummy, 0, sizeof(dummy));
1156 dummy.msg_type = UMT_MSG_FRAGMENTED_COMPLETE;
1157 dummy.msg_size = s->frag_ctx->on_wire_size;
1158 dummy.payload_size = s->frag_ctx->payload_size;
1159 dummy.frag_ctx = s->frag_ctx;
1161 dummy.cont_cls = NULL;
1164 call_continuation (&dummy, result);
1166 /* Remove leftover fragments from queue */
1167 if (s->address->address_length == sizeof(struct IPv6UdpAddress))
1169 udpw = plugin->ipv6_queue_head;
1170 while (NULL != udpw)
1173 if ((udpw->frag_ctx != NULL )&& (udpw->frag_ctx == s->frag_ctx)){
1174 dequeue (plugin, udpw);
1175 call_continuation (udpw, GNUNET_SYSERR);
1181 if (s->address->address_length == sizeof(struct IPv4UdpAddress))
1183 udpw = plugin->ipv4_queue_head;
1184 while (udpw != NULL )
1187 if ((NULL != udpw->frag_ctx) && (udpw->frag_ctx == s->frag_ctx))
1189 dequeue (plugin, udpw);
1190 call_continuation (udpw, GNUNET_SYSERR);
1197 /* Destroy fragmentation context */
1198 GNUNET_FRAGMENT_context_destroy (fc->frag, &s->last_expected_msg_delay,
1199 &s->last_expected_ack_delay);
1206 * Functions with this signature are called whenever we need
1207 * to close a session due to a disconnect or failure to
1208 * establish a connection.
1210 * @param cls closure with the `struct Plugin`
1211 * @param s session to close down
1212 * @return #GNUNET_OK on success
1215 udp_disconnect_session (void *cls, struct Session *s)
1217 struct Plugin *plugin = cls;
1218 struct UDP_MessageWrapper *udpw;
1219 struct UDP_MessageWrapper *next;
1221 GNUNET_assert(GNUNET_YES != s->in_destroy);
1222 LOG(GNUNET_ERROR_TYPE_DEBUG, "Session %p to peer `%s' address ended\n", s,
1223 GNUNET_i2s (&s->target),
1224 udp_address_to_string (NULL, s->address->address, s->address->address_length));
1225 /* stop timeout task */
1226 if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
1228 GNUNET_SCHEDULER_cancel (s->timeout_task);
1229 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1231 if (NULL != s->frag_ctx)
1233 /* Remove fragmented message due to disconnect */
1234 fragmented_message_done (s->frag_ctx, GNUNET_SYSERR);
1237 next = plugin->ipv4_queue_head;
1238 while (NULL != (udpw = next))
1241 if (udpw->session == s)
1243 dequeue (plugin, udpw);
1244 call_continuation (udpw, GNUNET_SYSERR);
1248 next = plugin->ipv6_queue_head;
1249 while (NULL != (udpw = next))
1252 if (udpw->session == s)
1254 dequeue (plugin, udpw);
1255 call_continuation (udpw, GNUNET_SYSERR);
1259 plugin->env->session_end (plugin->env->cls, s->address, s);
1261 if (NULL != s->frag_ctx)
1263 if (NULL != s->frag_ctx->cont)
1265 s->frag_ctx->cont (s->frag_ctx->cont_cls, &s->target, GNUNET_SYSERR,
1266 s->frag_ctx->payload_size, s->frag_ctx->on_wire_size);
1267 LOG(GNUNET_ERROR_TYPE_DEBUG,
1268 "Calling continuation for fragemented message to `%s' with result SYSERR\n",
1269 GNUNET_i2s (&s->target));
1274 GNUNET_YES == GNUNET_CONTAINER_multipeermap_remove (plugin->sessions, &s->target, s));
1275 GNUNET_STATISTICS_set (plugin->env->stats, "# UDP, sessions active",
1276 GNUNET_CONTAINER_multipeermap_size (plugin->sessions), GNUNET_NO);
1278 s->in_destroy = GNUNET_YES;
1281 GNUNET_HELLO_address_free (s->address);
1289 * Function that is called to get the keepalive factor.
1290 * #GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to
1291 * calculate the interval between keepalive packets.
1293 * @param cls closure with the `struct Plugin`
1294 * @return keepalive factor
1297 udp_query_keepalive_factor (void *cls)
1304 * Destroy a session, plugin is being unloaded.
1306 * @param cls the `struct Plugin`
1307 * @param key hash of public key of target peer
1308 * @param value a `struct PeerSession *` to clean up
1309 * @return #GNUNET_OK (continue to iterate)
1312 disconnect_and_free_it (void *cls,
1313 const struct GNUNET_PeerIdentity *key,
1316 struct Plugin *plugin = cls;
1318 udp_disconnect_session (plugin, value);
1324 * Disconnect from a remote node. Clean up session if we have one for
1327 * @param cls closure for this call (should be handle to Plugin)
1328 * @param target the peeridentity of the peer to disconnect
1329 * @return #GNUNET_OK on success, #GNUNET_SYSERR if the operation failed
1332 udp_disconnect (void *cls,
1333 const struct GNUNET_PeerIdentity *target)
1335 struct Plugin *plugin = cls;
1337 LOG (GNUNET_ERROR_TYPE_DEBUG,
1338 "Disconnecting from peer `%s'\n",
1339 GNUNET_i2s (target));
1340 /* Clean up sessions */
1341 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessions, target,
1342 &disconnect_and_free_it, plugin);
1347 * Session was idle, so disconnect it
1349 * @param cls the `struct Session` to time out
1350 * @param tc scheduler context
1353 session_timeout (void *cls,
1354 const struct GNUNET_SCHEDULER_TaskContext *tc)
1356 struct Session *s = cls;
1358 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1359 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1360 "Session %p was idle for %s, disconnecting\n",
1362 GNUNET_STRINGS_relative_time_to_string (UDP_SESSION_TIME_OUT,
1364 /* call session destroy function */
1365 udp_disconnect_session (plugin, s);
1370 * Increment session timeout due to activity
1372 * @param s session to reschedule timeout activity for
1375 reschedule_session_timeout (struct Session *s)
1377 if (GNUNET_YES == s->in_destroy)
1379 GNUNET_assert(GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
1380 GNUNET_SCHEDULER_cancel (s->timeout_task);
1381 s->timeout_task = GNUNET_SCHEDULER_add_delayed (UDP_SESSION_TIME_OUT,
1382 &session_timeout, s);
1383 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Timeout restarted for session %p\n", s);
1387 static struct Session *
1388 create_session (struct Plugin *plugin,
1389 const struct GNUNET_HELLO_Address *address)
1393 s = GNUNET_new (struct Session);
1394 s->address = GNUNET_HELLO_address_copy (address);
1395 s->target = address->peer;
1396 s->last_expected_ack_delay = GNUNET_TIME_relative_multiply (
1397 GNUNET_TIME_UNIT_MILLISECONDS, 250);
1398 s->last_expected_msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
1399 s->flow_delay_from_other_peer = GNUNET_TIME_UNIT_ZERO_ABS;
1400 s->flow_delay_for_other_peer = GNUNET_TIME_UNIT_ZERO;
1401 s->timeout_task = GNUNET_SCHEDULER_add_delayed (UDP_SESSION_TIME_OUT,
1402 &session_timeout, s);
1408 session_cmp_it (void *cls,
1409 const struct GNUNET_PeerIdentity *key,
1412 struct SessionCompareContext *cctx = cls;
1413 const struct GNUNET_HELLO_Address *address = cctx->address;
1414 struct Session *s = value;
1416 LOG (GNUNET_ERROR_TYPE_DEBUG,
1417 "Comparing address %s <-> %s\n",
1418 udp_address_to_string (NULL, address->address, address->address_length),
1419 udp_address_to_string (NULL, s->address->address, s->address->address_length));
1421 if (0 == GNUNET_HELLO_address_cmp(s->address, cctx->address))
1431 * Function obtain the network type for a session
1433 * @param cls closure ('struct Plugin*')
1434 * @param session the session
1435 * @return the network type
1437 static enum GNUNET_ATS_Network_Type
1438 udp_get_network (void *cls,
1439 struct Session *session)
1441 return ntohl (session->ats.value);
1446 * Creates a new outbound session the transport service will use to
1447 * send data to the peer
1449 * @param cls the plugin
1450 * @param address the address
1451 * @return the session or NULL of max connections exceeded
1453 static struct Session *
1454 udp_plugin_lookup_session (void *cls,
1455 const struct GNUNET_HELLO_Address *address)
1457 struct Plugin * plugin = cls;
1458 struct IPv6UdpAddress * udp_a6;
1459 struct IPv4UdpAddress * udp_a4;
1461 GNUNET_assert(plugin != NULL);
1462 GNUNET_assert(address != NULL);
1464 if ( (address->address == NULL )||
1465 ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1466 (address->address_length != sizeof (struct IPv6UdpAddress))))
1468 LOG (GNUNET_ERROR_TYPE_WARNING,
1469 _("Trying to create session for address of unexpected length %u (should be %u or %u)\n"),
1470 address->address_length,
1471 sizeof (struct IPv4UdpAddress),
1472 sizeof (struct IPv6UdpAddress));
1476 if (address->address_length == sizeof(struct IPv4UdpAddress))
1478 if (plugin->sockv4 == NULL)
1480 udp_a4 = (struct IPv4UdpAddress *) address->address;
1481 if (udp_a4->u4_port == 0)
1485 if (address->address_length == sizeof(struct IPv6UdpAddress))
1487 if (plugin->sockv6 == NULL)
1489 udp_a6 = (struct IPv6UdpAddress *) address->address;
1490 if (udp_a6->u6_port == 0)
1494 /* check if session already exists */
1495 struct SessionCompareContext cctx;
1496 cctx.address = address;
1498 LOG(GNUNET_ERROR_TYPE_DEBUG,
1499 "Looking for existing session for peer `%s' `%s' \n",
1500 GNUNET_i2s (&address->peer),
1501 udp_address_to_string(NULL, address->address, address->address_length));
1502 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessions, &address->peer,
1503 session_cmp_it, &cctx);
1504 if (cctx.res != NULL )
1506 LOG (GNUNET_ERROR_TYPE_DEBUG,
1507 "Found existing session %p\n",
1515 static struct Session *
1516 udp_plugin_create_session (void *cls,
1517 const struct GNUNET_HELLO_Address *address)
1520 struct IPv4UdpAddress *udp_v4;
1521 struct IPv6UdpAddress *udp_v6;
1523 s = create_session (plugin, address);
1524 if (sizeof (struct IPv4UdpAddress) == address->address_length)
1526 struct sockaddr_in v4;
1527 udp_v4 = (struct IPv4UdpAddress *) address->address;
1528 memset (&v4, '\0', sizeof (v4));
1529 v4.sin_family = AF_INET;
1530 #if HAVE_SOCKADDR_IN_SIN_LEN
1531 v4.sin_len = sizeof (struct sockaddr_in);
1533 v4.sin_port = udp_v4->u4_port;
1534 v4.sin_addr.s_addr = udp_v4->ipv4_addr;
1535 s->ats = plugin->env->get_address_type (plugin->env->cls,
1536 (const struct sockaddr *) &v4, sizeof (v4));
1538 else if (sizeof (struct IPv6UdpAddress) == address->address_length)
1540 struct sockaddr_in6 v6;
1541 udp_v6 = (struct IPv6UdpAddress *) address->address;
1542 memset (&v6, '\0', sizeof (v6));
1543 v6.sin6_family = AF_INET6;
1544 #if HAVE_SOCKADDR_IN_SIN_LEN
1545 v6.sin6_len = sizeof (struct sockaddr_in6);
1547 v6.sin6_port = udp_v6->u6_port;
1548 v6.sin6_addr = udp_v6->ipv6_addr;
1549 s->ats = plugin->env->get_address_type (plugin->env->cls,
1550 (const struct sockaddr *) &v6, sizeof (v6));
1554 return NULL; /* protocol not supported or address invalid */
1555 LOG(GNUNET_ERROR_TYPE_DEBUG,
1556 "Creating new %s session %p for peer `%s' address `%s'\n",
1557 GNUNET_HELLO_address_check_option (address, GNUNET_HELLO_ADDRESS_INFO_INBOUND) ? "inbound" : "outbound",
1558 s, GNUNET_i2s (&address->peer),
1559 udp_address_to_string( NULL,address->address,address->address_length));
1561 GNUNET_OK == GNUNET_CONTAINER_multipeermap_put (plugin->sessions, &s->target, s, GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1562 GNUNET_STATISTICS_set (plugin->env->stats, "# UDP, sessions active",
1563 GNUNET_CONTAINER_multipeermap_size (plugin->sessions), GNUNET_NO);
1569 udp_plugin_update_session_timeout (void *cls,
1570 const struct GNUNET_PeerIdentity *peer,
1571 struct Session *session)
1574 GNUNET_CONTAINER_multipeermap_contains_value (plugin->sessions, peer,
1581 /* Reschedule session timeout */
1582 reschedule_session_timeout (session);
1587 * Creates a new outbound session the transport service will use to send data to the
1590 * @param cls the plugin
1591 * @param address the address
1592 * @return the session or NULL of max connections exceeded
1594 static struct Session *
1595 udp_plugin_get_session (void *cls,
1596 const struct GNUNET_HELLO_Address *address)
1600 if (NULL == address)
1605 if ( (address->address_length != sizeof(struct IPv4UdpAddress)) &&
1606 (address->address_length != sizeof(struct IPv6UdpAddress)) )
1609 /* otherwise create new */
1610 if (NULL != (s = udp_plugin_lookup_session (cls, address)))
1612 return udp_plugin_create_session (cls, address);
1617 enqueue (struct Plugin *plugin,
1618 struct UDP_MessageWrapper *udpw)
1620 if (plugin->bytes_in_buffer + udpw->msg_size > INT64_MAX)
1624 GNUNET_STATISTICS_update (plugin->env->stats,
1625 "# UDP, total, bytes in buffers", udpw->msg_size, GNUNET_NO);
1626 plugin->bytes_in_buffer += udpw->msg_size;
1628 GNUNET_STATISTICS_update (plugin->env->stats, "# UDP, total, msgs in buffers",
1630 if (udpw->session->address->address_length == sizeof (struct IPv4UdpAddress))
1631 GNUNET_CONTAINER_DLL_insert(plugin->ipv4_queue_head,
1632 plugin->ipv4_queue_tail, udpw);
1633 else if (udpw->session->address->address_length == sizeof (struct IPv6UdpAddress))
1634 GNUNET_CONTAINER_DLL_insert(plugin->ipv6_queue_head,
1635 plugin->ipv6_queue_tail, udpw);
1642 * Fragment message was transmitted via UDP, let fragmentation know
1643 * to send the next fragment now.
1645 * @param cls the 'struct UDPMessageWrapper' of the fragment
1646 * @param target destination peer (ignored)
1647 * @param result GNUNET_OK on success (ignored)
1648 * @param payload bytes payload sent
1649 * @param physical bytes physical sent
1652 send_next_fragment (void *cls,
1653 const struct GNUNET_PeerIdentity *target,
1658 struct UDP_MessageWrapper *udpw = cls;
1660 GNUNET_FRAGMENT_context_transmission_done (udpw->frag_ctx->frag);
1665 * Function that is called with messages created by the fragmentation
1666 * module. In the case of the 'proc' callback of the
1667 * GNUNET_FRAGMENT_context_create function, this function must
1668 * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
1670 * @param cls closure, the 'struct FragmentationContext'
1671 * @param msg the message that was created
1674 enqueue_fragment (void *cls, const struct GNUNET_MessageHeader *msg)
1676 struct UDP_FragmentationContext *frag_ctx = cls;
1677 struct Plugin *plugin = frag_ctx->plugin;
1678 struct UDP_MessageWrapper * udpw;
1679 size_t msg_len = ntohs (msg->size);
1681 LOG(GNUNET_ERROR_TYPE_DEBUG, "Enqueuing fragment with %u bytes\n", msg_len);
1682 frag_ctx->fragments_used++;
1683 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msg_len);
1684 udpw->session = frag_ctx->session;
1685 udpw->msg_buf = (char *) &udpw[1];
1686 udpw->msg_size = msg_len;
1687 udpw->payload_size = msg_len; /*FIXME: minus fragment overhead */
1688 udpw->cont = &send_next_fragment;
1689 udpw->cont_cls = udpw;
1690 udpw->timeout = frag_ctx->timeout;
1691 udpw->frag_ctx = frag_ctx;
1692 udpw->msg_type = UMT_MSG_FRAGMENTED;
1693 memcpy (udpw->msg_buf, msg, msg_len);
1694 enqueue (plugin, udpw);
1695 schedule_select (plugin);
1700 * Function that can be used by the transport service to transmit
1701 * a message using the plugin. Note that in the case of a
1702 * peer disconnecting, the continuation MUST be called
1703 * prior to the disconnect notification itself. This function
1704 * will be called with this peer's HELLO message to initiate
1705 * a fresh connection to another peer.
1707 * @param cls closure
1708 * @param s which session must be used
1709 * @param msgbuf the message to transmit
1710 * @param msgbuf_size number of bytes in 'msgbuf'
1711 * @param priority how important is the message (most plugins will
1712 * ignore message priority and just FIFO)
1713 * @param to how long to wait at most for the transmission (does not
1714 * require plugins to discard the message after the timeout,
1715 * just advisory for the desired delay; most plugins will ignore
1717 * @param cont continuation to call once the message has
1718 * been transmitted (or if the transport is ready
1719 * for the next transmission call; or if the
1720 * peer disconnected...); can be NULL
1721 * @param cont_cls closure for cont
1722 * @return number of bytes used (on the physical network, with overheads);
1723 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1724 * and does NOT mean that the message was not transmitted (DV)
1727 udp_plugin_send (void *cls,
1731 unsigned int priority,
1732 struct GNUNET_TIME_Relative to,
1733 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1735 struct Plugin *plugin = cls;
1736 size_t udpmlen = msgbuf_size + sizeof(struct UDPMessage);
1737 struct UDP_FragmentationContext * frag_ctx;
1738 struct UDP_MessageWrapper * udpw;
1739 struct UDPMessage *udp;
1741 GNUNET_assert(plugin != NULL);
1742 GNUNET_assert(s != NULL);
1744 if ( (s->address->address_length == sizeof(struct IPv6UdpAddress)) &&
1745 (plugin->sockv6 == NULL) )
1746 return GNUNET_SYSERR;
1747 if ( (s->address->address_length == sizeof(struct IPv4UdpAddress)) &&
1748 (plugin->sockv4 == NULL) )
1749 return GNUNET_SYSERR;
1750 if (udpmlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1753 return GNUNET_SYSERR;
1756 != GNUNET_CONTAINER_multipeermap_contains_value (plugin->sessions,
1760 return GNUNET_SYSERR;
1762 LOG (GNUNET_ERROR_TYPE_DEBUG,
1763 "UDP transmits %u-byte message to `%s' using address `%s'\n", udpmlen,
1764 GNUNET_i2s (&s->target),
1765 udp_address_to_string (NULL, s->address->address,
1766 s->address->address_length));
1769 udp = (struct UDPMessage *) mbuf;
1770 udp->header.size = htons (udpmlen);
1771 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
1772 udp->reserved = htonl (0);
1773 udp->sender = *plugin->env->my_identity;
1775 /* We do not update the session time out here!
1776 * Otherwise this session will not timeout since we send keep alive before
1777 * session can timeout
1779 * For UDP we update session timeout only on receive, this will cover keep
1780 * alives, since remote peer will reply with keep alive response!
1782 if (udpmlen <= UDP_MTU)
1784 /* unfragmented message */
1785 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + udpmlen);
1787 udpw->msg_buf = (char *) &udpw[1];
1788 udpw->msg_size = udpmlen; /* message size with UDP overhead */
1789 udpw->payload_size = msgbuf_size; /* message size without UDP overhead */
1790 udpw->timeout = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (), to);
1792 udpw->cont_cls = cont_cls;
1793 udpw->frag_ctx = NULL;
1794 udpw->msg_type = UMT_MSG_UNFRAGMENTED;
1795 memcpy (udpw->msg_buf, udp, sizeof(struct UDPMessage));
1796 memcpy (&udpw->msg_buf[sizeof(struct UDPMessage)], msgbuf, msgbuf_size);
1797 enqueue (plugin, udpw);
1799 GNUNET_STATISTICS_update (plugin->env->stats,
1800 "# UDP, unfragmented msgs, messages, attempt", 1, GNUNET_NO);
1801 GNUNET_STATISTICS_update (plugin->env->stats,
1802 "# UDP, unfragmented msgs, bytes payload, attempt", udpw->payload_size,
1807 /* fragmented message */
1808 if (s->frag_ctx != NULL)
1809 return GNUNET_SYSERR;
1810 memcpy (&udp[1], msgbuf, msgbuf_size);
1811 frag_ctx = GNUNET_new (struct UDP_FragmentationContext);
1812 frag_ctx->plugin = plugin;
1813 frag_ctx->session = s;
1814 frag_ctx->cont = cont;
1815 frag_ctx->cont_cls = cont_cls;
1816 frag_ctx->timeout = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1818 frag_ctx->payload_size = msgbuf_size; /* unfragmented message size without UDP overhead */
1819 frag_ctx->on_wire_size = 0; /* bytes with UDP and fragmentation overhead */
1820 frag_ctx->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
1821 UDP_MTU, &plugin->tracker, s->last_expected_msg_delay,
1822 s->last_expected_ack_delay, &udp->header, &enqueue_fragment, frag_ctx);
1823 s->frag_ctx = frag_ctx;
1824 GNUNET_STATISTICS_update (plugin->env->stats,
1825 "# UDP, fragmented msgs, messages, pending", 1, GNUNET_NO);
1826 GNUNET_STATISTICS_update (plugin->env->stats,
1827 "# UDP, fragmented msgs, messages, attempt", 1, GNUNET_NO);
1828 GNUNET_STATISTICS_update (plugin->env->stats,
1829 "# UDP, fragmented msgs, bytes payload, attempt",
1830 frag_ctx->payload_size, GNUNET_NO);
1832 schedule_select (plugin);
1838 * Our external IP address/port mapping has changed.
1840 * @param cls closure, the `struct LocalAddrList`
1841 * @param add_remove #GNUNET_YES to mean the new public IP address, #GNUNET_NO to mean
1842 * the previous (now invalid) one
1843 * @param addr either the previous or the new public IP address
1844 * @param addrlen actual lenght of the address
1847 udp_nat_port_map_callback (void *cls, int add_remove,
1848 const struct sockaddr *addr,
1851 struct Plugin *plugin = cls;
1852 struct GNUNET_HELLO_Address *address;
1853 struct IPv4UdpAddress u4;
1854 struct IPv6UdpAddress u6;
1858 LOG(GNUNET_ERROR_TYPE_INFO, "NAT notification to %s address `%s'\n",
1859 (GNUNET_YES == add_remove) ? "add" : "remove",
1860 GNUNET_a2s (addr, addrlen));
1862 /* convert 'address' to our internal format */
1863 switch (addr->sa_family)
1866 GNUNET_assert(addrlen == sizeof(struct sockaddr_in));
1867 memset (&u4, 0, sizeof(u4));
1868 u4.options = htonl (myoptions);
1869 u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1870 u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
1871 if (0 == ((struct sockaddr_in *) addr)->sin_port)
1874 args = sizeof(struct IPv4UdpAddress);
1877 GNUNET_assert(addrlen == sizeof(struct sockaddr_in6));
1878 memset (&u6, 0, sizeof(u6));
1879 u6.options = htonl (myoptions);
1880 if (0 == ((struct sockaddr_in6 *) addr)->sin6_port)
1882 memcpy (&u6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
1883 sizeof(struct in6_addr));
1884 u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
1886 args = sizeof(struct IPv6UdpAddress);
1892 /* modify our published address list */
1893 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
1894 PLUGIN_NAME, arg, args, GNUNET_HELLO_ADDRESS_INFO_NONE);
1895 plugin->env->notify_address (plugin->env->cls, add_remove, address);
1896 GNUNET_HELLO_address_free (address);
1901 * Message tokenizer has broken up an incomming message. Pass it on
1904 * @param cls the 'struct Plugin'
1905 * @param client the `struct SourceInformation`
1906 * @param hdr the actual message
1907 * @return #GNUNET_OK (always)
1910 process_inbound_tokenized_messages (void *cls, void *client,
1911 const struct GNUNET_MessageHeader *hdr)
1913 struct Plugin *plugin = cls;
1914 struct SourceInformation *si = client;
1915 struct GNUNET_TIME_Relative delay;
1917 GNUNET_assert(si->session != NULL);
1918 if (GNUNET_YES == si->session->in_destroy)
1921 GNUNET_break(ntohl (si->session->ats.value) != GNUNET_ATS_NET_UNSPECIFIED);
1922 reschedule_session_timeout (si->session);
1923 delay = plugin->env->receive (plugin->env->cls, si->session->address, si->session, hdr);
1924 plugin->env->update_address_metrics (plugin->env->cls,
1925 si->session->address, si->session,
1926 &si->session->ats, 1);
1927 si->session->flow_delay_for_other_peer = delay;
1933 * We've received a UDP Message. Process it (pass contents to main service).
1935 * @param plugin plugin context
1936 * @param msg the message
1937 * @param sender_addr sender address
1938 * @param sender_addr_len number of bytes in sender_addr
1941 process_udp_message (struct Plugin *plugin,
1942 const struct UDPMessage *msg,
1943 const struct sockaddr *sender_addr,
1944 socklen_t sender_addr_len)
1946 struct SourceInformation si;
1948 struct GNUNET_HELLO_Address *address;
1949 struct IPv4UdpAddress u4;
1950 struct IPv6UdpAddress u6;
1954 if (0 != ntohl (msg->reserved))
1959 if (ntohs (msg->header.size)
1960 < sizeof(struct GNUNET_MessageHeader) + sizeof(struct UDPMessage))
1966 /* convert address */
1967 switch (sender_addr->sa_family)
1970 GNUNET_assert(sender_addr_len == sizeof(struct sockaddr_in));
1971 memset (&u4, 0, sizeof(u4));
1972 u6.options = htonl (0);
1973 u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
1974 u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
1979 GNUNET_assert(sender_addr_len == sizeof(struct sockaddr_in6));
1980 memset (&u6, 0, sizeof(u6));
1981 u6.options = htonl (0);
1982 u6.ipv6_addr = ((struct sockaddr_in6 *) sender_addr)->sin6_addr;
1983 u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
1991 LOG(GNUNET_ERROR_TYPE_DEBUG,
1992 "Received message with %u bytes from peer `%s' at `%s'\n",
1993 (unsigned int ) ntohs (msg->header.size), GNUNET_i2s (&msg->sender),
1994 GNUNET_a2s (sender_addr, sender_addr_len));
1996 address = GNUNET_HELLO_address_allocate ( &msg->sender, PLUGIN_NAME,
1997 arg, args, GNUNET_HELLO_ADDRESS_INFO_INBOUND);
1998 if (NULL == (s = udp_plugin_lookup_session (plugin, address)))
2000 s = udp_plugin_create_session (plugin, address);
2001 plugin->env->session_start (NULL, address, s, NULL, 0);
2003 GNUNET_free(address);
2005 /* iterate over all embedded messages */
2007 si.sender = msg->sender;
2011 GNUNET_SERVER_mst_receive (plugin->mst, &si, (const char *) &msg[1],
2012 ntohs (msg->header.size) - sizeof(struct UDPMessage), GNUNET_YES,
2015 if ((0 == s->rc) && (GNUNET_YES == s->in_destroy))
2021 * Scan the heap for a receive context with the given address.
2023 * @param cls the `struct FindReceiveContext`
2024 * @param node internal node of the heap
2025 * @param element value stored at the node (a 'struct ReceiveContext')
2026 * @param cost cost associated with the node
2027 * @return #GNUNET_YES if we should continue to iterate,
2028 * #GNUNET_NO if not.
2031 find_receive_context (void *cls, struct GNUNET_CONTAINER_HeapNode *node,
2032 void *element, GNUNET_CONTAINER_HeapCostType cost)
2034 struct FindReceiveContext *frc = cls;
2035 struct DefragContext *e = element;
2037 if ((frc->addr_len == e->addr_len)
2038 && (0 == memcmp (frc->addr, e->src_addr, frc->addr_len)))
2048 * Process a defragmented message.
2050 * @param cls the 'struct ReceiveContext'
2051 * @param msg the message
2054 fragment_msg_proc (void *cls, const struct GNUNET_MessageHeader *msg)
2056 struct DefragContext *rc = cls;
2058 if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
2063 if (ntohs (msg->size) < sizeof(struct UDPMessage))
2068 process_udp_message (rc->plugin, (const struct UDPMessage *) msg,
2069 rc->src_addr, rc->addr_len);
2074 * Context to lookup a session based on a IP address
2076 struct LookupContext
2081 struct Session *res;
2084 * The socket address
2086 const struct sockaddr *address;
2089 * The socket address length
2094 * Is a fragmentation context required for the session
2096 int must_have_frag_ctx;
2101 lookup_session_by_sockaddr_it (void *cls,
2102 const struct GNUNET_PeerIdentity *key,
2105 struct LookupContext *l_ctx = cls;
2106 struct Session * s = value;
2107 struct IPv4UdpAddress u4;
2108 struct IPv6UdpAddress u6;
2112 /* convert address */
2113 switch (l_ctx->address->sa_family)
2116 GNUNET_assert(l_ctx->addr_len == sizeof(struct sockaddr_in));
2117 memset (&u4, 0, sizeof(u4));
2118 u6.options = htonl (0);
2119 u4.ipv4_addr = ((struct sockaddr_in *) l_ctx->address)->sin_addr.s_addr;
2120 u4.u4_port = ((struct sockaddr_in *) l_ctx->address)->sin_port;
2125 GNUNET_assert(l_ctx->addr_len == sizeof(struct sockaddr_in6));
2126 memset (&u6, 0, sizeof(u6));
2127 u6.options = htonl (0);
2128 u6.ipv6_addr = ((struct sockaddr_in6 *) l_ctx->address)->sin6_addr;
2129 u6.u6_port = ((struct sockaddr_in6 *) l_ctx->address)->sin6_port;
2139 if ((GNUNET_YES == l_ctx->must_have_frag_ctx) && (NULL == s->frag_ctx))
2142 /* Does not compare peer identities but addresses */
2143 if ((args == s->address->address_length) &&
2144 (0 == memcmp (arg, s->address->address, args)))
2154 * Transmit an acknowledgement.
2156 * @param cls the 'struct ReceiveContext'
2157 * @param id message ID (unused)
2158 * @param msg ack to transmit
2161 ack_proc (void *cls, uint32_t id, const struct GNUNET_MessageHeader *msg)
2163 struct DefragContext *rc = cls;
2164 size_t msize = sizeof(struct UDP_ACK_Message) + ntohs (msg->size);
2165 struct UDP_ACK_Message *udp_ack;
2167 struct UDP_MessageWrapper *udpw;
2169 struct LookupContext l_ctx;
2171 l_ctx.address = rc->src_addr;
2172 l_ctx.addr_len = rc->addr_len;
2173 l_ctx.must_have_frag_ctx = GNUNET_NO;
2175 GNUNET_CONTAINER_multipeermap_iterate (rc->plugin->sessions,
2176 &lookup_session_by_sockaddr_it, &l_ctx);
2180 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Trying to transmit ACK to peer `%s' but not session found!\n",
2181 GNUNET_a2s(rc->src_addr, rc->addr_len));
2184 if (s->flow_delay_for_other_peer.rel_value_us <= UINT32_MAX)
2185 delay = s->flow_delay_for_other_peer.rel_value_us;
2187 LOG(GNUNET_ERROR_TYPE_DEBUG, "Sending ACK to `%s' including delay of %s\n",
2188 GNUNET_a2s (rc->src_addr, (rc->src_addr->sa_family == AF_INET) ? sizeof (struct sockaddr_in) : sizeof (struct sockaddr_in6)),
2189 GNUNET_STRINGS_relative_time_to_string (s->flow_delay_for_other_peer, GNUNET_YES));
2190 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msize);
2191 udpw->msg_size = msize;
2192 udpw->payload_size = 0;
2194 udpw->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
2195 udpw->msg_buf = (char *) &udpw[1];
2196 udpw->msg_type = UMT_MSG_ACK;
2197 udp_ack = (struct UDP_ACK_Message *) udpw->msg_buf;
2198 udp_ack->header.size = htons ((uint16_t) msize);
2199 udp_ack->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
2200 udp_ack->delay = htonl (delay);
2201 udp_ack->sender = *rc->plugin->env->my_identity;
2202 memcpy (&udp_ack[1], msg, ntohs (msg->size));
2203 enqueue (rc->plugin, udpw);
2204 schedule_select (rc->plugin);
2209 read_process_msg (struct Plugin *plugin,
2210 const struct GNUNET_MessageHeader *msg,
2211 const struct sockaddr *addr,
2214 if (ntohs (msg->size) < sizeof(struct UDPMessage))
2219 process_udp_message (plugin, (const struct UDPMessage *) msg, addr, fromlen);
2224 read_process_ack (struct Plugin *plugin,
2225 const struct GNUNET_MessageHeader *msg,
2226 const struct sockaddr *addr,
2229 const struct GNUNET_MessageHeader *ack;
2230 const struct UDP_ACK_Message *udp_ack;
2231 struct LookupContext l_ctx;
2233 struct GNUNET_TIME_Relative flow_delay;
2235 if (ntohs (msg->size)
2236 < sizeof(struct UDP_ACK_Message) + sizeof(struct GNUNET_MessageHeader))
2241 udp_ack = (const struct UDP_ACK_Message *) msg;
2243 /* Lookup session based on sockaddr */
2244 l_ctx.address = addr;
2245 l_ctx.addr_len = fromlen;
2247 l_ctx.must_have_frag_ctx = GNUNET_YES;
2248 GNUNET_CONTAINER_multipeermap_iterate (plugin->sessions,
2249 &lookup_session_by_sockaddr_it, &l_ctx);
2251 if ((NULL == s) || (NULL == s->frag_ctx))
2256 flow_delay.rel_value_us = (uint64_t) ntohl (udp_ack->delay);
2257 LOG(GNUNET_ERROR_TYPE_DEBUG, "We received a sending delay of %s\n",
2258 GNUNET_STRINGS_relative_time_to_string (flow_delay, GNUNET_YES));
2259 s->flow_delay_from_other_peer = GNUNET_TIME_relative_to_absolute (flow_delay);
2261 ack = (const struct GNUNET_MessageHeader *) &udp_ack[1];
2262 if (ntohs (ack->size) != ntohs (msg->size) - sizeof(struct UDP_ACK_Message))
2269 != memcmp (&l_ctx.res->target, &udp_ack->sender,
2270 sizeof(struct GNUNET_PeerIdentity)))
2272 if (GNUNET_OK != GNUNET_FRAGMENT_process_ack (s->frag_ctx->frag, ack))
2274 LOG(GNUNET_ERROR_TYPE_DEBUG,
2275 "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
2276 (unsigned int ) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2277 GNUNET_a2s (addr, fromlen));
2278 /* Expect more ACKs to arrive */
2282 LOG(GNUNET_ERROR_TYPE_DEBUG, "Message full ACK'ed\n",
2283 (unsigned int ) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2284 GNUNET_a2s (addr, fromlen));
2286 /* Remove fragmented message after successful sending */
2287 fragmented_message_done (s->frag_ctx, GNUNET_OK);
2292 read_process_fragment (struct Plugin *plugin,
2293 const struct GNUNET_MessageHeader *msg,
2294 const struct sockaddr *addr,
2297 struct DefragContext *d_ctx;
2298 struct GNUNET_TIME_Absolute now;
2299 struct FindReceiveContext frc;
2303 frc.addr_len = fromlen;
2305 LOG(GNUNET_ERROR_TYPE_DEBUG, "UDP processes %u-byte fragment from `%s'\n",
2306 (unsigned int ) ntohs (msg->size), GNUNET_a2s (addr, fromlen));
2307 /* Lookup existing receive context for this address */
2308 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
2309 &find_receive_context, &frc);
2310 now = GNUNET_TIME_absolute_get ();
2315 /* Create a new defragmentation context */
2316 d_ctx = GNUNET_malloc (sizeof (struct DefragContext) + fromlen);
2317 memcpy (&d_ctx[1], addr, fromlen);
2318 d_ctx->src_addr = (const struct sockaddr *) &d_ctx[1];
2319 d_ctx->addr_len = fromlen;
2320 d_ctx->plugin = plugin;
2321 d_ctx->defrag = GNUNET_DEFRAGMENT_context_create (plugin->env->stats,
2322 UDP_MTU, UDP_MAX_MESSAGES_IN_DEFRAG, d_ctx, &fragment_msg_proc,
2324 d_ctx->hnode = GNUNET_CONTAINER_heap_insert (plugin->defrag_ctxs, d_ctx,
2325 (GNUNET_CONTAINER_HeapCostType) now.abs_value_us);
2326 LOG(GNUNET_ERROR_TYPE_DEBUG,
2327 "Created new defragmentation context for %u-byte fragment from `%s'\n",
2328 (unsigned int ) ntohs (msg->size), GNUNET_a2s (addr, fromlen));
2332 LOG(GNUNET_ERROR_TYPE_DEBUG,
2333 "Found existing defragmentation context for %u-byte fragment from `%s'\n",
2334 (unsigned int ) ntohs (msg->size), GNUNET_a2s (addr, fromlen));
2337 if (GNUNET_OK == GNUNET_DEFRAGMENT_process_fragment (d_ctx->defrag, msg))
2339 /* keep this 'rc' from expiring */
2340 GNUNET_CONTAINER_heap_update_cost (plugin->defrag_ctxs, d_ctx->hnode,
2341 (GNUNET_CONTAINER_HeapCostType) now.abs_value_us);
2343 if (GNUNET_CONTAINER_heap_get_size (plugin->defrag_ctxs) >
2344 UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
2346 /* remove 'rc' that was inactive the longest */
2347 d_ctx = GNUNET_CONTAINER_heap_remove_root (plugin->defrag_ctxs);
2348 GNUNET_assert(NULL != d_ctx);
2349 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
2356 * Read and process a message from the given socket.
2358 * @param plugin the overall plugin
2359 * @param rsock socket to read from
2362 udp_select_read (struct Plugin *plugin,
2363 struct GNUNET_NETWORK_Handle *rsock)
2366 struct sockaddr_storage addr;
2367 char buf[65536] GNUNET_ALIGN;
2369 const struct GNUNET_MessageHeader *msg;
2371 fromlen = sizeof(addr);
2372 memset (&addr, 0, sizeof(addr));
2373 size = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof(buf),
2374 (struct sockaddr *) &addr, &fromlen);
2376 /* On SOCK_DGRAM UDP sockets recvfrom might fail with a
2377 * WSAECONNRESET error to indicate that previous sendto() (yes, sendto!)
2378 * on this socket has failed.
2380 * WSAECONNRESET - The virtual circuit was reset by the remote side
2381 * executing a hard or abortive close. The application should close
2382 * the socket; it is no longer usable. On a UDP-datagram socket this
2383 * error indicates a previous send operation resulted in an ICMP Port
2384 * Unreachable message.
2386 if ( (-1 == size) && (ECONNRESET == errno) )
2391 LOG(GNUNET_ERROR_TYPE_DEBUG, "UDP failed to receive data: %s\n",
2393 /* Connection failure or something. Not a protocol violation. */
2396 if (size < sizeof(struct GNUNET_MessageHeader))
2398 LOG(GNUNET_ERROR_TYPE_WARNING,
2399 "UDP got %u bytes, which is not enough for a GNUnet message header\n",
2400 (unsigned int ) size);
2401 /* _MAY_ be a connection failure (got partial message) */
2402 /* But it _MAY_ also be that the other side uses non-GNUnet protocol. */
2406 msg = (const struct GNUNET_MessageHeader *) buf;
2408 LOG(GNUNET_ERROR_TYPE_DEBUG,
2409 "UDP received %u-byte message from `%s' type %u\n", (unsigned int ) size,
2410 GNUNET_a2s ((const struct sockaddr * ) &addr, fromlen),
2413 if (size != ntohs (msg->size))
2419 GNUNET_STATISTICS_update (plugin->env->stats, "# UDP, total, bytes, received",
2425 switch (ntohs (msg->type))
2427 case GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON:
2428 if (GNUNET_YES == plugin->enable_broadcasting_receiving)
2429 udp_broadcast_receive (plugin, buf, size, (const struct sockaddr *) &addr,
2432 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
2433 read_process_msg (plugin, msg, (const struct sockaddr *) &addr, fromlen);
2435 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
2436 read_process_ack (plugin, msg, (const struct sockaddr *) &addr, fromlen);
2438 case GNUNET_MESSAGE_TYPE_FRAGMENT:
2439 read_process_fragment (plugin, msg, (const struct sockaddr *) &addr,
2449 static struct UDP_MessageWrapper *
2450 remove_timeout_messages_and_select (struct UDP_MessageWrapper *head,
2451 struct GNUNET_NETWORK_Handle *sock)
2453 struct UDP_MessageWrapper *udpw = NULL;
2454 struct GNUNET_TIME_Relative remaining;
2457 while (udpw != NULL )
2459 /* Find messages with timeout */
2460 remaining = GNUNET_TIME_absolute_get_remaining (udpw->timeout);
2461 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2463 /* Message timed out */
2464 switch (udpw->msg_type)
2466 case UMT_MSG_UNFRAGMENTED:
2467 GNUNET_STATISTICS_update (plugin->env->stats,
2468 "# UDP, total, bytes, sent, timeout", udpw->msg_size, GNUNET_NO);
2469 GNUNET_STATISTICS_update (plugin->env->stats,
2470 "# UDP, total, messages, sent, timeout", 1, GNUNET_NO);
2471 GNUNET_STATISTICS_update (plugin->env->stats,
2472 "# UDP, unfragmented msgs, messages, sent, timeout", 1, GNUNET_NO);
2473 GNUNET_STATISTICS_update (plugin->env->stats,
2474 "# UDP, unfragmented msgs, bytes, sent, timeout",
2475 udpw->payload_size, GNUNET_NO);
2476 /* Not fragmented message */
2477 LOG(GNUNET_ERROR_TYPE_DEBUG,
2478 "Message for peer `%s' with size %u timed out\n",
2479 GNUNET_i2s (&udpw->session->target), udpw->payload_size);
2480 call_continuation (udpw, GNUNET_SYSERR);
2481 /* Remove message */
2482 dequeue (plugin, udpw);
2485 case UMT_MSG_FRAGMENTED:
2486 /* Fragmented message */
2487 GNUNET_STATISTICS_update (plugin->env->stats,
2488 "# UDP, total, bytes, sent, timeout", udpw->frag_ctx->on_wire_size,
2490 GNUNET_STATISTICS_update (plugin->env->stats,
2491 "# UDP, total, messages, sent, timeout", 1, GNUNET_NO);
2492 call_continuation (udpw, GNUNET_SYSERR);
2493 LOG(GNUNET_ERROR_TYPE_DEBUG,
2494 "Fragment for message for peer `%s' with size %u timed out\n",
2495 GNUNET_i2s (&udpw->session->target), udpw->frag_ctx->payload_size);
2497 GNUNET_STATISTICS_update (plugin->env->stats,
2498 "# UDP, fragmented msgs, messages, sent, timeout", 1, GNUNET_NO);
2499 GNUNET_STATISTICS_update (plugin->env->stats,
2500 "# UDP, fragmented msgs, bytes, sent, timeout",
2501 udpw->frag_ctx->payload_size, GNUNET_NO);
2502 /* Remove fragmented message due to timeout */
2503 fragmented_message_done (udpw->frag_ctx, GNUNET_SYSERR);
2506 GNUNET_STATISTICS_update (plugin->env->stats,
2507 "# UDP, total, bytes, sent, timeout", udpw->msg_size, GNUNET_NO);
2508 GNUNET_STATISTICS_update (plugin->env->stats,
2509 "# UDP, total, messages, sent, timeout", 1, GNUNET_NO);
2510 LOG(GNUNET_ERROR_TYPE_DEBUG,
2511 "ACK Message for peer `%s' with size %u timed out\n",
2512 GNUNET_i2s (&udpw->session->target), udpw->payload_size);
2513 call_continuation (udpw, GNUNET_SYSERR);
2514 dequeue (plugin, udpw);
2520 if (sock == plugin->sockv4)
2521 udpw = plugin->ipv4_queue_head;
2522 else if (sock == plugin->sockv6)
2523 udpw = plugin->ipv6_queue_head;
2526 GNUNET_break(0); /* should never happen */
2529 GNUNET_STATISTICS_update (plugin->env->stats,
2530 "# messages dismissed due to timeout", 1, GNUNET_NO);
2534 /* Message did not time out, check flow delay */
2535 remaining = GNUNET_TIME_absolute_get_remaining (
2536 udpw->session->flow_delay_from_other_peer);
2537 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2539 /* this message is not delayed */
2540 LOG(GNUNET_ERROR_TYPE_DEBUG,
2541 "Message for peer `%s' (%u bytes) is not delayed \n",
2542 GNUNET_i2s (&udpw->session->target), udpw->payload_size);
2543 break; /* Found message to send, break */
2547 /* Message is delayed, try next */
2548 LOG(GNUNET_ERROR_TYPE_DEBUG,
2549 "Message for peer `%s' (%u bytes) is delayed for %s\n",
2550 GNUNET_i2s (&udpw->session->target), udpw->payload_size,
2551 GNUNET_STRINGS_relative_time_to_string (remaining, GNUNET_YES));
2561 analyze_send_error (struct Plugin *plugin,
2562 const struct sockaddr *sa,
2563 socklen_t slen, int error)
2565 static int network_down_error;
2566 struct GNUNET_ATS_Information type;
2568 type = plugin->env->get_address_type (plugin->env->cls, sa, slen);
2569 if (((GNUNET_ATS_NET_LAN == ntohl (type.value))
2570 || (GNUNET_ATS_NET_WAN == ntohl (type.value)))
2571 && ((ENETUNREACH == errno)|| (ENETDOWN == errno)))
2573 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in)))
2575 /* IPv4: "Network unreachable" or "Network down"
2577 * This indicates we do not have connectivity
2579 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2580 _("UDP could not transmit message to `%s': "
2581 "Network seems down, please check your network configuration\n"),
2582 GNUNET_a2s (sa, slen));
2584 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in6)))
2586 /* IPv6: "Network unreachable" or "Network down"
2588 * This indicates that this system is IPv6 enabled, but does not
2589 * have a valid global IPv6 address assigned or we do not have
2593 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2594 _("UDP could not transmit IPv6 message! "
2595 "Please check your network configuration and disable IPv6 if your "
2596 "connection does not have a global IPv6 address\n"));
2601 LOG (GNUNET_ERROR_TYPE_WARNING,
2602 "UDP could not transmit message to `%s': `%s'\n",
2603 GNUNET_a2s (sa, slen), STRERROR (error));
2609 udp_select_send (struct Plugin *plugin,
2610 struct GNUNET_NETWORK_Handle *sock)
2615 const struct IPv4UdpAddress *u4;
2616 struct sockaddr_in a4;
2617 const struct IPv6UdpAddress *u6;
2618 struct sockaddr_in6 a6;
2619 struct UDP_MessageWrapper *udpw;
2621 /* Find message to send */
2622 udpw = remove_timeout_messages_and_select ((sock == plugin->sockv4)
2623 ? plugin->ipv4_queue_head
2624 : plugin->ipv6_queue_head,
2627 return 0; /* No message to send */
2629 if (sizeof (struct IPv4UdpAddress) == udpw->session->address->address_length)
2631 u4 = udpw->session->address->address;
2632 memset (&a4, 0, sizeof(a4));
2633 a4.sin_family = AF_INET;
2634 #if HAVE_SOCKADDR_IN_SIN_LEN
2635 a4.sin_len = sizeof (a4);
2637 a4.sin_port = u4->u4_port;
2638 memcpy (&a4.sin_addr, &u4->ipv4_addr, sizeof(struct in_addr));
2639 a = (struct sockaddr *) &a4;
2642 else if (sizeof (struct IPv6UdpAddress) == udpw->session->address->address_length)
2644 u6 = udpw->session->address->address;
2645 memset (&a6, 0, sizeof(a6));
2646 a6.sin6_family = AF_INET6;
2647 #if HAVE_SOCKADDR_IN_SIN_LEN
2648 a6.sin6_len = sizeof (a6);
2650 a6.sin6_port = u6->u6_port;
2651 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof(struct in6_addr));
2652 a = (struct sockaddr *) &a6;
2657 call_continuation (udpw, GNUNET_OK);
2658 dequeue (plugin, udpw);
2660 return GNUNET_SYSERR;
2663 sent = GNUNET_NETWORK_socket_sendto (sock, udpw->msg_buf, udpw->msg_size, a,
2666 if (GNUNET_SYSERR == sent)
2669 analyze_send_error (plugin, a, slen, errno);
2670 call_continuation (udpw, GNUNET_SYSERR);
2671 GNUNET_STATISTICS_update (plugin->env->stats,
2672 "# UDP, total, bytes, sent, failure", sent, GNUNET_NO);
2673 GNUNET_STATISTICS_update (plugin->env->stats,
2674 "# UDP, total, messages, sent, failure", 1, GNUNET_NO);
2679 LOG(GNUNET_ERROR_TYPE_DEBUG,
2680 "UDP transmitted %u-byte message to `%s' `%s' (%d: %s)\n",
2681 (unsigned int ) (udpw->msg_size), GNUNET_i2s (&udpw->session->target),
2682 GNUNET_a2s (a, slen), (int ) sent,
2683 (sent < 0) ? STRERROR (errno) : "ok");
2684 GNUNET_STATISTICS_update (plugin->env->stats,
2685 "# UDP, total, bytes, sent, success", sent, GNUNET_NO);
2686 GNUNET_STATISTICS_update (plugin->env->stats,
2687 "# UDP, total, messages, sent, success", 1, GNUNET_NO);
2688 if (NULL != udpw->frag_ctx)
2689 udpw->frag_ctx->on_wire_size += udpw->msg_size;
2690 call_continuation (udpw, GNUNET_OK);
2692 dequeue (plugin, udpw);
2701 * We have been notified that our readset has something to read. We don't
2702 * know which socket needs to be read, so we have to check each one
2703 * Then reschedule this function to be called again once more is available.
2705 * @param cls the plugin handle
2706 * @param tc the scheduling context (for rescheduling this function again)
2709 udp_plugin_select (void *cls,
2710 const struct GNUNET_SCHEDULER_TaskContext *tc)
2712 struct Plugin *plugin = cls;
2714 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
2715 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2717 if ((0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
2718 && (NULL != plugin->sockv4)
2719 && (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv4)))
2720 udp_select_read (plugin, plugin->sockv4);
2721 if ((0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY))
2722 && (NULL != plugin->sockv4) && (NULL != plugin->ipv4_queue_head)
2723 && (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv4)))
2724 udp_select_send (plugin, plugin->sockv4);
2725 schedule_select (plugin);
2730 * We have been notified that our readset has something to read. We don't
2731 * know which socket needs to be read, so we have to check each one
2732 * Then reschedule this function to be called again once more is available.
2734 * @param cls the plugin handle
2735 * @param tc the scheduling context (for rescheduling this function again)
2738 udp_plugin_select_v6 (void *cls,
2739 const struct GNUNET_SCHEDULER_TaskContext *tc)
2741 struct Plugin *plugin = cls;
2743 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2744 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2746 if (((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0)
2747 && (NULL != plugin->sockv6)
2748 && (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv6)))
2749 udp_select_read (plugin, plugin->sockv6);
2750 if ((0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY))
2751 && (NULL != plugin->sockv6) && (plugin->ipv6_queue_head != NULL )&&
2752 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv6)) )udp_select_send (plugin, plugin->sockv6);
2753 schedule_select (plugin);
2758 * Setup the UDP sockets (for IPv4 and IPv6) for the plugin.
2760 * @param plugin the plugin to initialize
2761 * @param bind_v6 IPv6 address to bind to (can be NULL, for 'any')
2762 * @param bind_v4 IPv4 address to bind to (can be NULL, for 'any')
2763 * @return number of sockets that were successfully bound
2766 setup_sockets (struct Plugin *plugin,
2767 const struct sockaddr_in6 *bind_v6,
2768 const struct sockaddr_in *bind_v4)
2771 int sockets_created = 0;
2772 struct sockaddr_in6 server_addrv6;
2773 struct sockaddr_in server_addrv4;
2774 struct sockaddr *server_addr;
2775 struct sockaddr *addrs[2];
2776 socklen_t addrlens[2];
2780 /* Create IPv6 socket */
2782 if (GNUNET_YES == plugin->enable_ipv6)
2784 plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
2785 if (NULL == plugin->sockv6)
2787 LOG(GNUNET_ERROR_TYPE_WARNING,
2788 "Disabling IPv6 since it is not supported on this system!\n");
2789 plugin->enable_ipv6 = GNUNET_NO;
2793 memset (&server_addrv6, '\0', sizeof(struct sockaddr_in6));
2794 #if HAVE_SOCKADDR_IN_SIN_LEN
2795 server_addrv6.sin6_len = sizeof (struct sockaddr_in6);
2797 server_addrv6.sin6_family = AF_INET6;
2798 if (NULL != bind_v6)
2799 server_addrv6.sin6_addr = bind_v6->sin6_addr;
2801 server_addrv6.sin6_addr = in6addr_any;
2803 if (0 == plugin->port) /* autodetect */
2804 server_addrv6.sin6_port = htons (
2805 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537)
2808 server_addrv6.sin6_port = htons (plugin->port);
2809 addrlen = sizeof(struct sockaddr_in6);
2810 server_addr = (struct sockaddr *) &server_addrv6;
2815 LOG(GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv6 `%s'\n",
2816 GNUNET_a2s (server_addr, addrlen));
2819 == GNUNET_NETWORK_socket_bind (plugin->sockv6, server_addr,
2823 if (0 != plugin->port)
2825 tries = 10; /* fail */
2826 break; /* bind failed on specific port */
2829 server_addrv6.sin6_port = htons (
2830 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537)
2836 GNUNET_NETWORK_socket_close (plugin->sockv6);
2837 plugin->enable_ipv6 = GNUNET_NO;
2838 plugin->sockv6 = NULL;
2841 if (plugin->sockv6 != NULL )
2843 LOG(GNUNET_ERROR_TYPE_DEBUG, "IPv6 socket created on port %s\n",
2844 GNUNET_a2s (server_addr, addrlen));
2845 addrs[sockets_created] = (struct sockaddr *) &server_addrv6;
2846 addrlens[sockets_created] = sizeof(struct sockaddr_in6);
2851 LOG(GNUNET_ERROR_TYPE_ERROR, "Failed to bind UDP socket to %s: %s\n",
2852 GNUNET_a2s (server_addr, addrlen), STRERROR (eno));
2857 /* Create IPv4 socket */
2859 plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
2860 if (NULL == plugin->sockv4)
2862 GNUNET_log_strerror(GNUNET_ERROR_TYPE_WARNING, "socket");
2863 LOG(GNUNET_ERROR_TYPE_WARNING,
2864 "Disabling IPv4 since it is not supported on this system!\n");
2865 plugin->enable_ipv4 = GNUNET_NO;
2869 memset (&server_addrv4, '\0', sizeof(struct sockaddr_in));
2870 #if HAVE_SOCKADDR_IN_SIN_LEN
2871 server_addrv4.sin_len = sizeof (struct sockaddr_in);
2873 server_addrv4.sin_family = AF_INET;
2874 if (NULL != bind_v4)
2875 server_addrv4.sin_addr = bind_v4->sin_addr;
2877 server_addrv4.sin_addr.s_addr = INADDR_ANY;
2879 if (0 == plugin->port)
2881 server_addrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG,
2885 server_addrv4.sin_port = htons (plugin->port);
2887 addrlen = sizeof(struct sockaddr_in);
2888 server_addr = (struct sockaddr *) &server_addrv4;
2893 LOG (GNUNET_ERROR_TYPE_DEBUG,
2894 "Binding to IPv4 `%s'\n",
2895 GNUNET_a2s (server_addr, addrlen));
2899 == GNUNET_NETWORK_socket_bind (plugin->sockv4, server_addr, addrlen))
2902 if (0 != plugin->port)
2904 tries = 10; /* fail */
2905 break; /* bind failed on specific port */
2909 server_addrv4.sin_port = htons (
2910 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537)
2917 GNUNET_NETWORK_socket_close (plugin->sockv4);
2918 plugin->enable_ipv4 = GNUNET_NO;
2919 plugin->sockv4 = NULL;
2922 if (NULL != plugin->sockv4)
2924 LOG(GNUNET_ERROR_TYPE_DEBUG, "IPv4 socket created on port %s\n",
2925 GNUNET_a2s (server_addr, addrlen));
2926 addrs[sockets_created] = (struct sockaddr *) &server_addrv4;
2927 addrlens[sockets_created] = sizeof(struct sockaddr_in);
2932 LOG(GNUNET_ERROR_TYPE_ERROR, "Failed to bind UDP socket to %s: %s\n",
2933 GNUNET_a2s (server_addr, addrlen), STRERROR (eno));
2937 if (0 == sockets_created)
2939 LOG(GNUNET_ERROR_TYPE_WARNING, _("Failed to open UDP sockets\n"));
2940 return 0; /* No sockets created, return */
2943 /* Create file descriptors */
2944 if (plugin->enable_ipv4 == GNUNET_YES)
2946 plugin->rs_v4 = GNUNET_NETWORK_fdset_create ();
2947 plugin->ws_v4 = GNUNET_NETWORK_fdset_create ();
2948 GNUNET_NETWORK_fdset_zero (plugin->rs_v4);
2949 GNUNET_NETWORK_fdset_zero (plugin->ws_v4);
2950 if (NULL != plugin->sockv4)
2952 GNUNET_NETWORK_fdset_set (plugin->rs_v4, plugin->sockv4);
2953 GNUNET_NETWORK_fdset_set (plugin->ws_v4, plugin->sockv4);
2957 if (plugin->enable_ipv6 == GNUNET_YES)
2959 plugin->rs_v6 = GNUNET_NETWORK_fdset_create ();
2960 plugin->ws_v6 = GNUNET_NETWORK_fdset_create ();
2961 GNUNET_NETWORK_fdset_zero (plugin->rs_v6);
2962 GNUNET_NETWORK_fdset_zero (plugin->ws_v6);
2963 if (NULL != plugin->sockv6)
2965 GNUNET_NETWORK_fdset_set (plugin->rs_v6, plugin->sockv6);
2966 GNUNET_NETWORK_fdset_set (plugin->ws_v6, plugin->sockv6);
2970 schedule_select (plugin);
2971 plugin->nat = GNUNET_NAT_register (plugin->env->cfg, GNUNET_NO, plugin->port,
2973 (const struct sockaddr **) addrs, addrlens,
2974 &udp_nat_port_map_callback, NULL, plugin);
2976 return sockets_created;
2981 * The exported method. Makes the core api available via a global and
2982 * returns the udp transport API.
2984 * @param cls our `struct GNUNET_TRANSPORT_PluginEnvironment`
2985 * @return our `struct GNUNET_TRANSPORT_PluginFunctions`
2988 libgnunet_plugin_transport_udp_init (void *cls)
2990 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2991 struct GNUNET_TRANSPORT_PluginFunctions *api;
2993 unsigned long long port;
2994 unsigned long long aport;
2995 unsigned long long udp_max_bps;
2996 unsigned long long enable_v6;
2997 unsigned long long enable_broadcasting;
2998 unsigned long long enable_broadcasting_recv;
2999 char *bind4_address;
3000 char *bind6_address;
3001 char *fancy_interval;
3002 struct GNUNET_TIME_Relative interval;
3003 struct sockaddr_in server_addrv4;
3004 struct sockaddr_in6 server_addrv6;
3009 if (NULL == env->receive)
3011 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
3012 initialze the plugin or the API */
3013 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
3015 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3016 api->address_to_string = &udp_address_to_string;
3017 api->string_to_address = &udp_string_to_address;
3021 /* Get port number: port == 0 : autodetect a port,
3022 * > 0 : use this port, not given : 2086 default */
3024 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3028 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3029 "ADVERTISED_PORT", &aport))
3033 LOG (GNUNET_ERROR_TYPE_WARNING,
3034 _("Given `%s' option is out of range: %llu > %u\n"),
3042 GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "nat", "DISABLEV6"))
3043 enable_v6 = GNUNET_NO;
3045 enable_v6 = GNUNET_YES;
3048 have_bind4 = GNUNET_NO;
3049 memset (&server_addrv4, 0, sizeof(server_addrv4));
3050 if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3051 "BINDTO", &bind4_address))
3053 LOG (GNUNET_ERROR_TYPE_DEBUG,
3054 "Binding udp plugin to specific address: `%s'\n",
3056 if (1 != inet_pton (AF_INET, bind4_address, &server_addrv4.sin_addr))
3058 GNUNET_free (bind4_address);
3061 have_bind4 = GNUNET_YES;
3063 GNUNET_free_non_null(bind4_address);
3064 have_bind6 = GNUNET_NO;
3065 memset (&server_addrv6, 0, sizeof(server_addrv6));
3067 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3068 "BINDTO6", &bind6_address))
3070 LOG (GNUNET_ERROR_TYPE_DEBUG,
3071 "Binding udp plugin to specific address: `%s'\n", bind6_address);
3072 if (1 != inet_pton (AF_INET6, bind6_address, &server_addrv6.sin6_addr))
3074 LOG (GNUNET_ERROR_TYPE_ERROR,
3075 _("Invalid IPv6 address: `%s'\n"),
3077 GNUNET_free (bind6_address);
3080 have_bind6 = GNUNET_YES;
3082 GNUNET_free_non_null (bind6_address);
3084 /* Initialize my flags */
3087 /* Enable neighbour discovery */
3088 enable_broadcasting = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
3089 "transport-udp", "BROADCAST");
3090 if (enable_broadcasting == GNUNET_SYSERR)
3091 enable_broadcasting = GNUNET_NO;
3093 enable_broadcasting_recv = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
3094 "transport-udp", "BROADCAST_RECEIVE");
3095 if (enable_broadcasting_recv == GNUNET_SYSERR)
3096 enable_broadcasting_recv = GNUNET_YES;
3099 == GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3100 "BROADCAST_INTERVAL", &fancy_interval))
3102 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
3107 == GNUNET_STRINGS_fancy_time_to_relative (fancy_interval, &interval))
3109 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30);
3111 GNUNET_free(fancy_interval);
3114 /* Maximum datarate */
3116 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3117 "MAX_BPS", &udp_max_bps))
3119 udp_max_bps = 1024 * 1024 * 50; /* 50 MB/s == infinity for practical purposes */
3122 p = GNUNET_new (struct Plugin);
3125 p->broadcast_interval = interval;
3126 p->enable_ipv6 = enable_v6;
3127 p->enable_ipv4 = GNUNET_YES; /* default */
3128 p->enable_broadcasting = enable_broadcasting;
3129 p->enable_broadcasting_receiving = enable_broadcasting_recv;
3131 p->sessions = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
3132 p->defrag_ctxs = GNUNET_CONTAINER_heap_create (
3133 GNUNET_CONTAINER_HEAP_ORDER_MIN);
3134 p->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages, p);
3135 GNUNET_BANDWIDTH_tracker_init (&p->tracker, NULL, NULL,
3136 GNUNET_BANDWIDTH_value_init ((uint32_t) udp_max_bps), 30);
3139 LOG(GNUNET_ERROR_TYPE_DEBUG, "Setting up sockets\n");
3140 res = setup_sockets (p,
3141 (GNUNET_YES == have_bind6) ? &server_addrv6 : NULL,
3142 (GNUNET_YES == have_bind4) ? &server_addrv4 : NULL);
3143 if ((res == 0) || ((p->sockv4 == NULL )&& (p->sockv6 == NULL)))
3145 LOG (GNUNET_ERROR_TYPE_ERROR,
3146 _("Failed to create network sockets, plugin failed\n"));
3147 GNUNET_CONTAINER_multipeermap_destroy (p->sessions);
3148 GNUNET_CONTAINER_heap_destroy (p->defrag_ctxs);
3149 GNUNET_SERVER_mst_destroy (p->mst);
3154 /* Setup broadcasting and receiving beacons */
3155 setup_broadcast (p, &server_addrv6, &server_addrv4);
3157 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
3160 api->disconnect_session = &udp_disconnect_session;
3161 api->query_keepalive_factor = &udp_query_keepalive_factor;
3162 api->disconnect_peer = &udp_disconnect;
3163 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3164 api->address_to_string = &udp_address_to_string;
3165 api->string_to_address = &udp_string_to_address;
3166 api->check_address = &udp_plugin_check_address;
3167 api->get_session = &udp_plugin_get_session;
3168 api->send = &udp_plugin_send;
3169 api->get_network = &udp_get_network;
3170 api->update_session_timeout = &udp_plugin_update_session_timeout;
3176 * Function called on each entry in the defragmentation heap to
3180 * @param node node in the heap (to be removed)
3181 * @param element a `struct DefragContext` to be cleaned up
3182 * @param cost unused
3183 * @return #GNUNET_YES
3186 heap_cleanup_iterator (void *cls,
3187 struct GNUNET_CONTAINER_HeapNode *node,
3189 GNUNET_CONTAINER_HeapCostType cost)
3191 struct DefragContext *d_ctx = element;
3193 GNUNET_CONTAINER_heap_remove_node (node);
3194 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
3195 GNUNET_free (d_ctx);
3201 * The exported method. Makes the core api available via a global and
3202 * returns the udp transport API.
3204 * @param cls our `struct GNUNET_TRANSPORT_PluginEnvironment`
3208 libgnunet_plugin_transport_udp_done (void *cls)
3210 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
3211 struct Plugin *plugin = api->cls;
3212 struct PrettyPrinterContext *cur;
3213 struct PrettyPrinterContext *next;
3214 struct UDP_MessageWrapper *udpw;
3221 stop_broadcast (plugin);
3222 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK )
3224 GNUNET_SCHEDULER_cancel (plugin->select_task);
3225 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
3227 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK )
3229 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
3230 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
3233 /* Closing sockets */
3234 if (GNUNET_YES == plugin->enable_ipv4)
3236 if (NULL != plugin->sockv4)
3238 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
3239 plugin->sockv4 = NULL;
3241 GNUNET_NETWORK_fdset_destroy (plugin->rs_v4);
3242 GNUNET_NETWORK_fdset_destroy (plugin->ws_v4);
3244 if (GNUNET_YES == plugin->enable_ipv6)
3246 if (NULL != plugin->sockv6)
3248 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
3249 plugin->sockv6 = NULL;
3251 GNUNET_NETWORK_fdset_destroy (plugin->rs_v6);
3252 GNUNET_NETWORK_fdset_destroy (plugin->ws_v6);
3255 if (NULL != plugin->nat)
3257 GNUNET_NAT_unregister (plugin->nat);
3260 if (NULL != plugin->defrag_ctxs)
3262 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
3263 &heap_cleanup_iterator, NULL);
3264 GNUNET_CONTAINER_heap_destroy (plugin->defrag_ctxs);
3265 plugin->defrag_ctxs = NULL;
3267 if (NULL != plugin->mst)
3269 GNUNET_SERVER_mst_destroy (plugin->mst);
3273 /* Clean up leftover messages */
3274 udpw = plugin->ipv4_queue_head;
3275 while (NULL != udpw)
3277 struct UDP_MessageWrapper *tmp = udpw->next;
3278 dequeue (plugin, udpw);
3279 call_continuation (udpw, GNUNET_SYSERR);
3283 udpw = plugin->ipv6_queue_head;
3284 while (NULL != udpw)
3286 struct UDP_MessageWrapper *tmp = udpw->next;
3287 dequeue (plugin, udpw);
3288 call_continuation (udpw, GNUNET_SYSERR);
3293 /* Clean up sessions */
3294 LOG(GNUNET_ERROR_TYPE_DEBUG,
3295 "Cleaning up sessions\n");
3296 GNUNET_CONTAINER_multipeermap_iterate (plugin->sessions,
3297 &disconnect_and_free_it, plugin);
3298 GNUNET_CONTAINER_multipeermap_destroy (plugin->sessions);
3300 next = ppc_dll_head;
3301 for (cur = next; NULL != cur; cur = next)
3304 GNUNET_CONTAINER_DLL_remove(ppc_dll_head, ppc_dll_tail, cur);
3305 GNUNET_RESOLVER_request_cancel (cur->resolver_handle);
3306 GNUNET_SCHEDULER_cancel (cur->timeout_task);
3310 GNUNET_free (plugin);
3315 /* end of plugin_transport_udp.c */