2 This file is part of GNUnet
3 (C) 2010-2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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)
47 #define PLUGIN_NAME "udp"
50 * Number of messages we can defragment in parallel. We only really
51 * defragment 1 message at a time, but if messages get re-ordered, we
52 * may want to keep knowledge about the previous message to avoid
53 * discarding the current message in favor of a single fragment of a
54 * previous message. 3 should be good since we don't expect massive
55 * message reorderings with UDP.
57 #define UDP_MAX_MESSAGES_IN_DEFRAG 3
60 * We keep a defragmentation queue per sender address. How many
61 * sender addresses do we support at the same time? Memory consumption
62 * is roughly a factor of 32k * UDP_MAX_MESSAGES_IN_DEFRAG times this
63 * value. (So 128 corresponds to 12 MB and should suffice for
64 * connecting to roughly 128 peers via UDP).
66 #define UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG 128
69 * Running pretty printers: head
71 static struct PrettyPrinterContext *ppc_dll_head;
74 * Running pretty printers: tail
76 static struct PrettyPrinterContext *ppc_dll_tail;
79 * Closure for 'append_port'.
81 struct PrettyPrinterContext
86 struct PrettyPrinterContext *next;
91 struct PrettyPrinterContext *prev;
96 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
101 struct GNUNET_RESOLVER_RequestHandle *resolver_handle;
104 * Function to call with the result.
106 GNUNET_TRANSPORT_AddressStringCallback asc;
114 * Port to add after the IP address.
135 MSG_FRAGMENTED_COMPLETE = 2,
136 MSG_UNFRAGMENTED = 3,
145 * Which peer is this session for?
147 struct GNUNET_PeerIdentity target;
150 * Plugin this session belongs to.
152 struct Plugin *plugin;
155 * Context for dealing with fragments.
157 struct UDP_FragmentationContext *frag_ctx;
160 * Address of the other peer
162 const struct sockaddr *sock_addr;
165 * Desired delay for next sending we send to other peer
167 struct GNUNET_TIME_Relative flow_delay_for_other_peer;
170 * Desired delay for next sending we received from other peer
172 struct GNUNET_TIME_Absolute flow_delay_from_other_peer;
175 * Session timeout task
177 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
180 * expected delay for ACKs
182 struct GNUNET_TIME_Relative last_expected_ack_delay;
185 * desired delay between UDP messages
187 struct GNUNET_TIME_Relative last_expected_msg_delay;
189 struct GNUNET_ATS_Information ats;
192 * Number of bytes in @e sock_addr.
197 * Reference counter to indicate that this session is
198 * currently being used and must not be destroyed;
199 * setting @e in_destroy will destroy it as soon as
205 * Is this session about to be destroyed (sometimes we cannot
206 * destroy a session immediately as below us on the stack
207 * there might be code that still uses it; in this case,
208 * @e rc is non-zero).
217 * Closure for #session_cmp_it().
219 struct SessionCompareContext
222 const struct GNUNET_HELLO_Address *addr;
228 * Closure for #process_inbound_tokenized_messages().
230 struct SourceInformation
235 struct GNUNET_PeerIdentity sender;
243 * Associated session.
245 struct Session *session;
248 * Number of bytes in source address.
256 * Closure for #find_receive_context().
258 struct FindReceiveContext
261 * Where to store the result.
263 struct DefragContext *rc;
268 const struct sockaddr *addr;
270 struct Session *session;
273 * Number of bytes in @e addr.
282 * Data structure to track defragmentation contexts based
283 * on the source of the UDP traffic.
289 * Defragmentation context.
291 struct GNUNET_DEFRAGMENT_Context *defrag;
294 * Source address this receive context is for (allocated at the
295 * end of the struct).
297 const struct sockaddr *src_addr;
300 * Reference to master plugin struct.
302 struct Plugin *plugin;
305 * Node in the defrag heap.
307 struct GNUNET_CONTAINER_HeapNode *hnode;
310 * Length of 'src_addr'
318 * Context to send fragmented messages
320 struct UDP_FragmentationContext
323 * Next in linked list
325 struct UDP_FragmentationContext *next;
328 * Previous in linked list
330 struct UDP_FragmentationContext *prev;
335 struct Plugin *plugin;
338 * Handle for GNUNET_FRAGMENT context
340 struct GNUNET_FRAGMENT_Context *frag;
343 * The session this fragmentation context belongs to
345 struct Session *session;
348 * Function to call upon completion of the transmission.
350 GNUNET_TRANSPORT_TransmitContinuation cont;
353 * Closure for @e cont.
360 struct GNUNET_TIME_Absolute timeout;
363 * Payload size of original unfragmented message
368 * Bytes used to send all fragments on wire including UDP overhead
372 unsigned int fragments_used;
377 struct UDP_MessageWrapper
380 * Session this message belongs to
382 struct Session *session;
388 struct UDP_MessageWrapper *prev;
394 struct UDP_MessageWrapper *next;
398 * According to UDP_MessageType
403 * Message with size msg_size including UDP specific overhead
408 * Size of UDP message to send including UDP specific overhead
413 * Payload size of original message
420 struct GNUNET_TIME_Absolute timeout;
423 * Function to call upon completion of the transmission.
425 GNUNET_TRANSPORT_TransmitContinuation cont;
428 * Closure for 'cont'.
433 * Fragmentation context
434 * frag_ctx == NULL if transport <= MTU
435 * frag_ctx != NULL if transport > MTU
437 struct UDP_FragmentationContext *frag_ctx;
442 * UDP ACK Message-Packet header (after defragmentation).
444 struct UDP_ACK_Message
449 struct GNUNET_MessageHeader header;
452 * Desired delay for flow control
457 * What is the identity of the sender
459 struct GNUNET_PeerIdentity sender;
466 static uint32_t myoptions;
470 * Encapsulation of all of the state of the plugin.
472 struct Plugin * plugin;
476 * We have been notified that our readset has something to read. We don't
477 * know which socket needs to be read, so we have to check each one
478 * Then reschedule this function to be called again once more is available.
480 * @param cls the plugin handle
481 * @param tc the scheduling context (for rescheduling this function again)
484 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);
500 * (re)schedule select tasks for this plugin.
502 * @param plugin plugin to reschedule
505 schedule_select (struct Plugin *plugin)
507 struct GNUNET_TIME_Relative min_delay;
508 struct UDP_MessageWrapper *udpw;
510 if ((GNUNET_YES == plugin->enable_ipv4) && (NULL != plugin->sockv4))
512 /* Find a message ready to send:
513 * Flow delay from other peer is expired or not set (0) */
514 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
515 for (udpw = plugin->ipv4_queue_head; NULL != udpw; udpw = udpw->next)
516 min_delay = GNUNET_TIME_relative_min (min_delay,
517 GNUNET_TIME_absolute_get_remaining (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 =
526 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
527 (0 == min_delay.rel_value_us) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
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 (udpw->session->flow_delay_from_other_peer));
539 if (GNUNET_SCHEDULER_NO_TASK != plugin->select_task_v6)
540 GNUNET_SCHEDULER_cancel(plugin->select_task_v6);
541 plugin->select_task_v6 =
542 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
543 (0 == min_delay.rel_value_us) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
545 (0 == min_delay.rel_value_us) ? plugin->ws_v6 : NULL,
546 &udp_plugin_select_v6, plugin);
552 * Function called for a quick conversion of the binary address to
553 * a numeric address. Note that the caller must not free the
554 * address and that the next call to this function is allowed
555 * to override the address again.
558 * @param addr binary address
559 * @param addrlen length of the address
560 * @return string representing the same address
563 udp_address_to_string (void *cls, const void *addr, size_t addrlen)
565 static char rbuf[INET6_ADDRSTRLEN + 10];
566 char buf[INET6_ADDRSTRLEN];
570 const struct IPv4UdpAddress *t4;
571 const struct IPv6UdpAddress *t6;
576 if ((NULL != addr) && (addrlen == sizeof (struct IPv6UdpAddress)))
580 options = ntohl (t6->options);
581 port = ntohs (t6->u6_port);
582 memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
585 else if ((NULL != addr) && (addrlen == sizeof (struct IPv4UdpAddress)))
589 options = ntohl (t4->options);
590 port = ntohs (t4->u4_port);
591 memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
598 inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
600 GNUNET_snprintf (rbuf, sizeof (rbuf),
601 (af == AF_INET6) ? "%s.%u.[%s]:%u" : "%s.%u.%s:%u",
602 PLUGIN_NAME, options, buf, port);
608 * Function called to convert a string address to
611 * @param cls closure ('struct Plugin*')
612 * @param addr string address
613 * @param addrlen length of the address
614 * @param buf location to store the buffer
615 * @param added location to store the number of bytes in the buffer.
616 * If the function returns GNUNET_SYSERR, its contents are undefined.
617 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
620 udp_string_to_address (void *cls, const char *addr, uint16_t addrlen,
621 void **buf, size_t *added)
623 struct sockaddr_storage socket_address;
629 /* Format tcp.options.address:port */
634 if ((NULL == addr) || (addrlen == 0))
637 return GNUNET_SYSERR;
639 if ('\0' != addr[addrlen - 1])
642 return GNUNET_SYSERR;
644 if (strlen (addr) != addrlen - 1)
647 return GNUNET_SYSERR;
649 plugin = GNUNET_strdup (addr);
650 optionstr = strchr (plugin, '.');
651 if (NULL == optionstr)
654 GNUNET_free (plugin);
655 return GNUNET_SYSERR;
659 options = atol (optionstr);
660 address = strchr (optionstr, '.');
664 GNUNET_free (plugin);
665 return GNUNET_SYSERR;
671 GNUNET_STRINGS_to_address_ip (address, strlen (address),
675 GNUNET_free (plugin);
676 return GNUNET_SYSERR;
679 GNUNET_free (plugin);
681 switch (socket_address.ss_family)
685 struct IPv4UdpAddress *u4;
686 struct sockaddr_in *in4 = (struct sockaddr_in *) &socket_address;
687 u4 = GNUNET_malloc (sizeof (struct IPv4UdpAddress));
688 u4->options = htonl (options);
689 u4->ipv4_addr = in4->sin_addr.s_addr;
690 u4->u4_port = in4->sin_port;
692 *added = sizeof (struct IPv4UdpAddress);
697 struct IPv6UdpAddress *u6;
698 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &socket_address;
699 u6 = GNUNET_malloc (sizeof (struct IPv6UdpAddress));
700 u6->options = htonl (options);
701 u6->ipv6_addr = in6->sin6_addr;
702 u6->u6_port = in6->sin6_port;
704 *added = sizeof (struct IPv6UdpAddress);
709 return GNUNET_SYSERR;
715 ppc_cancel_task (void *cls,
716 const struct GNUNET_SCHEDULER_TaskContext *tc)
718 struct PrettyPrinterContext *ppc = cls;
720 ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
721 if (NULL != ppc->resolver_handle)
723 GNUNET_RESOLVER_request_cancel (ppc->resolver_handle);
724 ppc->resolver_handle = NULL;
726 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, ppc);
732 * Append our port and forward the result.
734 * @param cls a 'struct PrettyPrinterContext'
735 * @param hostname result from DNS resolver
738 append_port (void *cls, const char *hostname)
740 struct PrettyPrinterContext *ppc = cls;
741 struct PrettyPrinterContext *cur;
744 if (hostname == NULL)
746 ppc->asc (ppc->asc_cls, NULL);
747 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, ppc);
748 GNUNET_SCHEDULER_cancel (ppc->timeout_task);
749 ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
750 ppc->resolver_handle = NULL;
754 for (cur = ppc_dll_head; (NULL != cur); cur = cur->next)
761 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
762 "Invalid callback for PPC %p \n", ppc);
766 if (GNUNET_YES == ppc->ipv6)
767 GNUNET_asprintf (&ret,
774 GNUNET_asprintf (&ret,
780 ppc->asc (ppc->asc_cls, ret);
786 * Convert the transports address to a nice, human-readable
790 * @param type name of the transport that generated the address
791 * @param addr one of the addresses of the host, NULL for the last address
792 * the specific address format depends on the transport
793 * @param addrlen length of the address
794 * @param numeric should (IP) addresses be displayed in numeric form?
795 * @param timeout after how long should we give up?
796 * @param asc function to call on each string
797 * @param asc_cls closure for @a asc
800 udp_plugin_address_pretty_printer (void *cls, const char *type,
801 const void *addr, size_t addrlen,
803 struct GNUNET_TIME_Relative timeout,
804 GNUNET_TRANSPORT_AddressStringCallback asc,
807 struct PrettyPrinterContext *ppc;
810 struct sockaddr_in a4;
811 struct sockaddr_in6 a6;
812 const struct IPv4UdpAddress *u4;
813 const struct IPv6UdpAddress *u6;
817 if (addrlen == sizeof (struct IPv6UdpAddress))
820 memset (&a6, 0, sizeof (a6));
821 a6.sin6_family = AF_INET6;
822 #if HAVE_SOCKADDR_IN_SIN_LEN
823 a6.sin6_len = sizeof (a6);
825 a6.sin6_port = u6->u6_port;
826 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof (struct in6_addr));
827 port = ntohs (u6->u6_port);
828 options = ntohl (u6->options);
832 else if (addrlen == sizeof (struct IPv4UdpAddress))
835 memset (&a4, 0, sizeof (a4));
836 a4.sin_family = AF_INET;
837 #if HAVE_SOCKADDR_IN_SIN_LEN
838 a4.sin_len = sizeof (a4);
840 a4.sin_port = u4->u4_port;
841 a4.sin_addr.s_addr = u4->ipv4_addr;
842 port = ntohs (u4->u4_port);
843 options = ntohl (u4->options);
849 /* invalid address */
854 ppc = GNUNET_new (struct PrettyPrinterContext);
856 ppc->asc_cls = asc_cls;
858 ppc->options = options;
859 if (addrlen == sizeof (struct IPv6UdpAddress))
860 ppc->ipv6 = GNUNET_YES;
862 ppc->ipv6 = GNUNET_NO;
863 ppc->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply(timeout, 2),
864 &ppc_cancel_task, ppc);
865 GNUNET_CONTAINER_DLL_insert (ppc_dll_head, ppc_dll_tail, ppc);
866 ppc->resolver_handle = GNUNET_RESOLVER_hostname_get (sb, sbs,
874 call_continuation (struct UDP_MessageWrapper *udpw, int result)
878 LOG (GNUNET_ERROR_TYPE_DEBUG,
879 "Calling continuation for %u byte message to `%s' with result %s\n",
880 udpw->payload_size, GNUNET_i2s (&udpw->session->target),
881 (GNUNET_OK == result) ? "OK" : "SYSERR");
883 if (udpw->msg_size >= udpw->payload_size)
884 overhead = udpw->msg_size - udpw->payload_size;
886 overhead = udpw->msg_size;
890 switch (udpw->msg_type) {
891 case 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",
901 GNUNET_STATISTICS_update (plugin->env->stats,
902 "# UDP, unfragmented msgs, bytes payload, sent, success",
903 udpw->payload_size, GNUNET_NO);
904 GNUNET_STATISTICS_update (plugin->env->stats,
905 "# UDP, unfragmented msgs, bytes overhead, sent, success",
906 overhead, GNUNET_NO);
907 GNUNET_STATISTICS_update (plugin->env->stats,
908 "# UDP, total, bytes overhead, sent",
909 overhead, GNUNET_NO);
910 GNUNET_STATISTICS_update (plugin->env->stats,
911 "# UDP, total, bytes payload, sent",
912 udpw->payload_size, GNUNET_NO);
914 case MSG_FRAGMENTED_COMPLETE:
915 GNUNET_assert (NULL != udpw->frag_ctx);
916 if (udpw->frag_ctx->cont != NULL)
917 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_OK,
918 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
919 GNUNET_STATISTICS_update (plugin->env->stats,
920 "# UDP, fragmented msgs, messages, sent, success",
922 GNUNET_STATISTICS_update (plugin->env->stats,
923 "# UDP, fragmented msgs, bytes payload, sent, success",
924 udpw->payload_size, GNUNET_NO);
925 GNUNET_STATISTICS_update (plugin->env->stats,
926 "# UDP, fragmented msgs, bytes overhead, sent, success",
927 overhead, GNUNET_NO);
928 GNUNET_STATISTICS_update (plugin->env->stats,
929 "# UDP, total, bytes overhead, sent",
930 overhead, GNUNET_NO);
931 GNUNET_STATISTICS_update (plugin->env->stats,
932 "# UDP, total, bytes payload, sent",
933 udpw->payload_size, GNUNET_NO);
934 GNUNET_STATISTICS_update (plugin->env->stats,
935 "# UDP, fragmented msgs, messages, pending",
939 /* Fragmented message: enqueue next fragment */
940 if (NULL != udpw->cont)
941 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
942 udpw->payload_size, udpw->msg_size);
943 GNUNET_STATISTICS_update (plugin->env->stats,
944 "# UDP, fragmented msgs, fragments, sent, success",
946 GNUNET_STATISTICS_update (plugin->env->stats,
947 "# UDP, fragmented msgs, fragments bytes, sent, success",
948 udpw->msg_size, GNUNET_NO);
951 /* No continuation */
952 GNUNET_STATISTICS_update (plugin->env->stats,
953 "# UDP, ACK msgs, messages, sent, success",
955 GNUNET_STATISTICS_update (plugin->env->stats,
956 "# UDP, ACK msgs, bytes overhead, sent, success",
957 overhead, GNUNET_NO);
958 GNUNET_STATISTICS_update (plugin->env->stats,
959 "# UDP, total, bytes overhead, sent",
960 overhead, GNUNET_NO);
966 LOG (GNUNET_ERROR_TYPE_ERROR,
967 "ERROR: %u\n", udpw->msg_type);
973 switch (udpw->msg_type) {
974 case MSG_UNFRAGMENTED:
975 /* Unfragmented message: failed to send */
976 if (NULL != udpw->cont)
977 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
978 udpw->payload_size, overhead);
979 GNUNET_STATISTICS_update (plugin->env->stats,
980 "# UDP, unfragmented msgs, messages, sent, failure",
982 GNUNET_STATISTICS_update (plugin->env->stats,
983 "# UDP, unfragmented msgs, bytes payload, sent, failure",
984 udpw->payload_size, GNUNET_NO);
985 GNUNET_STATISTICS_update (plugin->env->stats,
986 "# UDP, unfragmented msgs, bytes overhead, sent, failure",
987 overhead, GNUNET_NO);
989 case MSG_FRAGMENTED_COMPLETE:
990 GNUNET_assert (NULL != udpw->frag_ctx);
991 if (udpw->frag_ctx->cont != NULL)
992 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_SYSERR,
993 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
994 GNUNET_STATISTICS_update (plugin->env->stats,
995 "# UDP, fragmented msgs, messages, sent, failure",
997 GNUNET_STATISTICS_update (plugin->env->stats,
998 "# UDP, fragmented msgs, bytes payload, sent, failure",
999 udpw->payload_size, GNUNET_NO);
1000 GNUNET_STATISTICS_update (plugin->env->stats,
1001 "# UDP, fragmented msgs, bytes payload, sent, failure",
1002 overhead, GNUNET_NO);
1003 GNUNET_STATISTICS_update (plugin->env->stats,
1004 "# UDP, fragmented msgs, bytes payload, sent, failure",
1005 overhead, GNUNET_NO);
1006 GNUNET_STATISTICS_update (plugin->env->stats,
1007 "# UDP, fragmented msgs, messages, pending",
1010 case MSG_FRAGMENTED:
1011 GNUNET_assert (NULL != udpw->frag_ctx);
1012 /* Fragmented message: failed to send */
1013 GNUNET_STATISTICS_update (plugin->env->stats,
1014 "# UDP, fragmented msgs, fragments, sent, failure",
1016 GNUNET_STATISTICS_update (plugin->env->stats,
1017 "# UDP, fragmented msgs, fragments bytes, sent, failure",
1018 udpw->msg_size, GNUNET_NO);
1021 /* ACK message: failed to send */
1022 GNUNET_STATISTICS_update (plugin->env->stats,
1023 "# UDP, ACK msgs, messages, sent, failure",
1027 /* Beacon message: failed to send */
1043 * Check if the given port is plausible (must be either our listen
1044 * port or our advertised port). If it is neither, we return
1047 * @param plugin global variables
1048 * @param in_port port number to check
1049 * @return #GNUNET_OK if port is either open_port or adv_port
1052 check_port (struct Plugin *plugin, uint16_t in_port)
1054 if ((in_port == plugin->port) || (in_port == plugin->aport))
1056 return GNUNET_SYSERR;
1061 * Function that will be called to check if a binary address for this
1062 * plugin is well-formed and corresponds to an address for THIS peer
1063 * (as per our configuration). Naturally, if absolutely necessary,
1064 * plugins can be a bit conservative in their answer, but in general
1065 * plugins should make sure that the address does not redirect
1066 * traffic to a 3rd party that might try to man-in-the-middle our
1069 * @param cls closure, should be our handle to the Plugin
1070 * @param addr pointer to the address
1071 * @param addrlen length of @a addr
1072 * @return #GNUNET_OK if this is a plausible address for this peer
1073 * and transport, #GNUNET_SYSERR if not
1077 udp_plugin_check_address (void *cls,
1081 struct Plugin *plugin = cls;
1082 struct IPv4UdpAddress *v4;
1083 struct IPv6UdpAddress *v6;
1085 if ((addrlen != sizeof (struct IPv4UdpAddress)) &&
1086 (addrlen != sizeof (struct IPv6UdpAddress)))
1088 GNUNET_break_op (0);
1089 return GNUNET_SYSERR;
1091 if (addrlen == sizeof (struct IPv4UdpAddress))
1093 v4 = (struct IPv4UdpAddress *) addr;
1094 if (GNUNET_OK != check_port (plugin, ntohs (v4->u4_port)))
1095 return GNUNET_SYSERR;
1097 GNUNET_NAT_test_address (plugin->nat, &v4->ipv4_addr,
1098 sizeof (struct in_addr)))
1099 return GNUNET_SYSERR;
1103 v6 = (struct IPv6UdpAddress *) addr;
1104 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1106 GNUNET_break_op (0);
1107 return GNUNET_SYSERR;
1109 if (GNUNET_OK != check_port (plugin, ntohs (v6->u6_port)))
1110 return GNUNET_SYSERR;
1112 GNUNET_NAT_test_address (plugin->nat, &v6->ipv6_addr,
1113 sizeof (struct in6_addr)))
1114 return GNUNET_SYSERR;
1121 * Function to free last resources associated with a session.
1123 * @param s session to free
1126 free_session (struct Session *s)
1128 if (NULL != s->frag_ctx)
1130 GNUNET_FRAGMENT_context_destroy (s->frag_ctx->frag, NULL, NULL);
1131 GNUNET_free (s->frag_ctx);
1139 dequeue (struct Plugin *plugin,
1140 struct UDP_MessageWrapper * udpw)
1142 if (plugin->bytes_in_buffer < udpw->msg_size)
1146 GNUNET_STATISTICS_update (plugin->env->stats,
1147 "# UDP, total, bytes in buffers",
1148 - (long long) udpw->msg_size, GNUNET_NO);
1149 plugin->bytes_in_buffer -= udpw->msg_size;
1151 GNUNET_STATISTICS_update (plugin->env->stats,
1152 "# UDP, total, msgs in buffers",
1154 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1155 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_queue_head,
1156 plugin->ipv4_queue_tail, udpw);
1157 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1158 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_queue_head,
1159 plugin->ipv6_queue_tail, udpw);
1164 fragmented_message_done (struct UDP_FragmentationContext *fc, int result)
1166 struct UDP_MessageWrapper *udpw;
1167 struct UDP_MessageWrapper *tmp;
1168 struct UDP_MessageWrapper dummy;
1169 struct Session *s = fc->session;
1171 LOG (GNUNET_ERROR_TYPE_DEBUG,
1172 "%p : Fragmented message removed with result %s\n",
1174 (result == GNUNET_SYSERR) ? "FAIL" : "SUCCESS");
1176 /* Call continuation for fragmented message */
1177 memset (&dummy, 0, sizeof (dummy));
1178 dummy.msg_type = MSG_FRAGMENTED_COMPLETE;
1179 dummy.msg_size = s->frag_ctx->on_wire_size;
1180 dummy.payload_size = s->frag_ctx->payload_size;
1181 dummy.frag_ctx = s->frag_ctx;
1183 dummy.cont_cls = NULL;
1186 call_continuation (&dummy, result);
1188 /* Remove leftover fragments from queue */
1189 if (s->addrlen == sizeof (struct sockaddr_in6))
1191 udpw = plugin->ipv6_queue_head;
1192 while (NULL != udpw)
1195 if ((udpw->frag_ctx != NULL) && (udpw->frag_ctx == s->frag_ctx))
1197 dequeue (plugin, udpw);
1198 call_continuation (udpw, GNUNET_SYSERR);
1204 if (s->addrlen == sizeof (struct sockaddr_in))
1206 udpw = plugin->ipv4_queue_head;
1210 if ((NULL != udpw->frag_ctx) && (udpw->frag_ctx == s->frag_ctx))
1212 dequeue (plugin, udpw);
1213 call_continuation (udpw, GNUNET_SYSERR);
1220 /* Destroy fragmentation context */
1221 GNUNET_FRAGMENT_context_destroy (fc->frag,
1222 &s->last_expected_msg_delay,
1223 &s->last_expected_ack_delay);
1230 * Functions with this signature are called whenever we need
1231 * to close a session due to a disconnect or failure to
1232 * establish a connection.
1234 * @param cls closure with the `struct Plugin`
1235 * @param s session to close down
1236 * @return #GNUNET_OK on success
1239 udp_disconnect_session (void *cls,
1242 struct Plugin *plugin = cls;
1243 struct UDP_MessageWrapper *udpw;
1244 struct UDP_MessageWrapper *next;
1246 GNUNET_assert (GNUNET_YES != s->in_destroy);
1247 LOG (GNUNET_ERROR_TYPE_DEBUG,
1248 "Session %p to peer `%s' address ended\n",
1250 GNUNET_i2s (&s->target),
1251 GNUNET_a2s (s->sock_addr, s->addrlen));
1252 /* stop timeout task */
1253 if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
1255 GNUNET_SCHEDULER_cancel (s->timeout_task);
1256 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1258 if (NULL != s->frag_ctx)
1260 /* Remove fragmented message due to disconnect */
1261 fragmented_message_done (s->frag_ctx, GNUNET_SYSERR);
1264 next = plugin->ipv4_queue_head;
1265 while (NULL != (udpw = next))
1268 if (udpw->session == s)
1270 dequeue (plugin, udpw);
1271 call_continuation (udpw, GNUNET_SYSERR);
1275 next = plugin->ipv6_queue_head;
1276 while (NULL != (udpw = next))
1279 if (udpw->session == s)
1281 dequeue (plugin, udpw);
1282 call_continuation (udpw, GNUNET_SYSERR);
1286 plugin->env->session_end (plugin->env->cls, &s->target, s);
1288 if (NULL != s->frag_ctx)
1290 if (NULL != s->frag_ctx->cont)
1292 s->frag_ctx->cont (s->frag_ctx->cont_cls, &s->target, GNUNET_SYSERR,
1293 s->frag_ctx->payload_size, s->frag_ctx->on_wire_size);
1294 LOG (GNUNET_ERROR_TYPE_DEBUG,
1295 "Calling continuation for fragemented message to `%s' with result SYSERR\n",
1296 GNUNET_i2s (&s->target));
1300 GNUNET_assert (GNUNET_YES ==
1301 GNUNET_CONTAINER_multipeermap_remove (plugin->sessions,
1304 GNUNET_STATISTICS_set (plugin->env->stats,
1305 "# UDP, sessions active",
1306 GNUNET_CONTAINER_multipeermap_size(plugin->sessions),
1309 s->in_destroy = GNUNET_YES;
1317 * Function that is called to get the keepalive factor.
1318 * GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to
1319 * calculate the interval between keepalive packets.
1321 * @param cls closure with the `struct Plugin`
1322 * @return keepalive factor
1325 udp_query_keepalive_factor (void *cls)
1332 * Destroy a session, plugin is being unloaded.
1334 * @param cls the `struct Plugin`
1335 * @param key hash of public key of target peer
1336 * @param value a `struct PeerSession *` to clean up
1337 * @return #GNUNET_OK (continue to iterate)
1340 disconnect_and_free_it (void *cls,
1341 const struct GNUNET_PeerIdentity *key,
1344 struct Plugin *plugin = cls;
1346 udp_disconnect_session (plugin, value);
1352 * Disconnect from a remote node. Clean up session if we have one for
1355 * @param cls closure for this call (should be handle to Plugin)
1356 * @param target the peeridentity of the peer to disconnect
1357 * @return #GNUNET_OK on success, #GNUNET_SYSERR if the operation failed
1360 udp_disconnect (void *cls,
1361 const struct GNUNET_PeerIdentity *target)
1363 struct Plugin *plugin = cls;
1365 LOG (GNUNET_ERROR_TYPE_DEBUG,
1366 "Disconnecting from peer `%s'\n",
1367 GNUNET_i2s (target));
1368 /* Clean up sessions */
1369 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessions, target,
1370 &disconnect_and_free_it, plugin);
1375 * Session was idle, so disconnect it
1377 * @param cls the `struct Session` to time out
1378 * @param tc scheduler context
1381 session_timeout (void *cls,
1382 const struct GNUNET_SCHEDULER_TaskContext *tc)
1384 struct Session *s = cls;
1386 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1388 "Session %p was idle for %s, disconnecting\n",
1390 GNUNET_STRINGS_relative_time_to_string (UDP_SESSION_TIME_OUT,
1392 /* call session destroy function */
1393 udp_disconnect_session (s->plugin,
1399 * Increment session timeout due to activity
1401 * @param s session to reschedule timeout activity for
1404 reschedule_session_timeout (struct Session *s)
1406 if (GNUNET_YES == s->in_destroy)
1408 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
1409 GNUNET_SCHEDULER_cancel (s->timeout_task);
1410 s->timeout_task = GNUNET_SCHEDULER_add_delayed (UDP_SESSION_TIME_OUT,
1413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1414 "Timeout restarted for session %p\n",
1419 static struct Session *
1420 create_session (struct Plugin *plugin,
1421 const struct GNUNET_PeerIdentity *target,
1422 const void *addr, size_t addrlen,
1423 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1426 const struct IPv4UdpAddress *t4;
1427 const struct IPv6UdpAddress *t6;
1428 struct sockaddr_in *v4;
1429 struct sockaddr_in6 *v6;
1440 case sizeof (struct IPv4UdpAddress):
1441 if (NULL == plugin->sockv4)
1443 LOG (GNUNET_ERROR_TYPE_DEBUG,
1444 "Could not create session for peer `%s' address `%s': IPv4 is not enabled\n",
1446 udp_address_to_string (NULL, addr, addrlen));
1450 s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in));
1452 len = sizeof (struct sockaddr_in);
1453 v4 = (struct sockaddr_in *) &s[1];
1454 v4->sin_family = AF_INET;
1455 #if HAVE_SOCKADDR_IN_SIN_LEN
1456 v4->sin_len = sizeof (struct sockaddr_in);
1458 v4->sin_port = t4->u4_port;
1459 v4->sin_addr.s_addr = t4->ipv4_addr;
1460 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v4, sizeof (struct sockaddr_in));
1462 case sizeof (struct IPv6UdpAddress):
1463 if (NULL == plugin->sockv6)
1465 LOG (GNUNET_ERROR_TYPE_INFO,
1466 "Could not create session for peer `%s' address `%s': IPv6 is not enabled\n",
1468 udp_address_to_string(NULL, addr, addrlen));
1472 s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in6));
1474 len = sizeof (struct sockaddr_in6);
1475 v6 = (struct sockaddr_in6 *) &s[1];
1476 v6->sin6_family = AF_INET6;
1477 #if HAVE_SOCKADDR_IN_SIN_LEN
1478 v6->sin6_len = sizeof (struct sockaddr_in6);
1480 v6->sin6_port = t6->u6_port;
1481 v6->sin6_addr = t6->ipv6_addr;
1482 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v6, sizeof (struct sockaddr_in6));
1485 /* Must have a valid address to send to */
1486 GNUNET_STATISTICS_update (plugin->env->stats,
1488 ("# requests to create session with invalid address"),
1493 s->target = *target;
1494 s->sock_addr = (const struct sockaddr *) &s[1];
1495 s->last_expected_ack_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 250);
1496 s->last_expected_msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
1497 s->flow_delay_from_other_peer = GNUNET_TIME_UNIT_ZERO_ABS;
1498 s->flow_delay_for_other_peer = GNUNET_TIME_UNIT_ZERO;
1499 s->inbound = GNUNET_NO;
1500 s->timeout_task = GNUNET_SCHEDULER_add_delayed (UDP_SESSION_TIME_OUT,
1508 session_cmp_it (void *cls,
1509 const struct GNUNET_PeerIdentity * key,
1512 struct SessionCompareContext * cctx = cls;
1513 const struct GNUNET_HELLO_Address *address = cctx->addr;
1514 struct Session *s = value;
1515 socklen_t s_addrlen = s->addrlen;
1517 LOG (GNUNET_ERROR_TYPE_DEBUG,
1518 "Comparing address %s <-> %s\n",
1519 udp_address_to_string (NULL, (void *) address->address,
1520 address->address_length),
1521 GNUNET_a2s (s->sock_addr, s->addrlen));
1522 if (s->inbound != cctx->inbound)
1524 if ((address->address_length == sizeof (struct IPv4UdpAddress)) &&
1525 (s_addrlen == sizeof (struct sockaddr_in)))
1527 struct IPv4UdpAddress * u4 = NULL;
1528 u4 = (struct IPv4UdpAddress *) address->address;
1529 GNUNET_assert (NULL != u4);
1530 const struct sockaddr_in *s4 = (const struct sockaddr_in *) s->sock_addr;
1531 if ((0 == memcmp ((const void *) &u4->ipv4_addr,(const void *) &s4->sin_addr, sizeof (struct in_addr))) &&
1532 (u4->u4_port == s4->sin_port))
1539 if ((address->address_length == sizeof (struct IPv6UdpAddress)) &&
1540 (s_addrlen == sizeof (struct sockaddr_in6)))
1542 struct IPv6UdpAddress * u6 = NULL;
1543 u6 = (struct IPv6UdpAddress *) address->address;
1544 GNUNET_assert (NULL != u6);
1545 const struct sockaddr_in6 *s6 = (const struct sockaddr_in6 *) s->sock_addr;
1546 if ((0 == memcmp (&u6->ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr))) &&
1547 (u6->u6_port == s6->sin6_port))
1558 * Function obtain the network type for a session
1560 * @param cls closure ('struct Plugin*')
1561 * @param session the session
1562 * @return the network type
1564 static enum GNUNET_ATS_Network_Type
1565 udp_get_network (void *cls,
1566 struct Session *session)
1568 return ntohl (session->ats.value);
1573 * Creates a new outbound session the transport service will use to
1574 * send data to the peer
1576 * @param cls the plugin
1577 * @param address the address
1578 * @param inbound look for inbound session
1579 * @return the session or NULL of max connections exceeded
1581 static struct Session *
1582 udp_plugin_lookup_session (void *cls,
1583 const struct GNUNET_HELLO_Address *address,
1586 struct Plugin * plugin = cls;
1587 struct IPv6UdpAddress * udp_a6;
1588 struct IPv4UdpAddress * udp_a4;
1590 GNUNET_assert (plugin != NULL);
1591 GNUNET_assert (address != NULL);
1594 if ((address->address == NULL) ||
1595 ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1596 (address->address_length != sizeof (struct IPv6UdpAddress))))
1598 LOG (GNUNET_ERROR_TYPE_WARNING,
1599 _("Trying to create session for address of unexpected length %u (should be %u or %u)\n"),
1600 address->address_length,
1601 sizeof (struct IPv4UdpAddress),
1602 sizeof (struct IPv6UdpAddress));
1606 if (address->address_length == sizeof (struct IPv4UdpAddress))
1608 if (plugin->sockv4 == NULL)
1610 udp_a4 = (struct IPv4UdpAddress *) address->address;
1611 if (udp_a4->u4_port == 0)
1615 if (address->address_length == sizeof (struct IPv6UdpAddress))
1617 if (plugin->sockv6 == NULL)
1619 udp_a6 = (struct IPv6UdpAddress *) address->address;
1620 if (udp_a6->u6_port == 0)
1624 /* check if session already exists */
1625 struct SessionCompareContext cctx;
1626 cctx.addr = address;
1628 cctx.inbound = inbound;
1629 LOG (GNUNET_ERROR_TYPE_DEBUG,
1630 "Looking for existing session for peer `%s' `%s' \n",
1631 GNUNET_i2s (&address->peer),
1632 udp_address_to_string(NULL, address->address, address->address_length));
1633 GNUNET_CONTAINER_multipeermap_get_multiple(plugin->sessions, &address->peer, session_cmp_it, &cctx);
1634 if (cctx.res != NULL)
1636 LOG (GNUNET_ERROR_TYPE_DEBUG, "Found existing session %p\n", cctx.res);
1643 static struct Session *
1644 udp_plugin_create_session (void *cls,
1645 const struct GNUNET_HELLO_Address *address,
1650 s = create_session (plugin,
1653 address->address_length,
1656 return NULL; /* protocol not supported or address invalid */
1657 s->inbound = inbound;
1658 LOG (GNUNET_ERROR_TYPE_DEBUG,
1659 "Creating new %s session %p for peer `%s' address `%s'\n",
1660 (GNUNET_YES == s->inbound) ? "inbound" : "outbound",
1662 GNUNET_i2s(&address->peer),
1663 udp_address_to_string(NULL,address->address,address->address_length));
1664 GNUNET_assert (GNUNET_OK ==
1665 GNUNET_CONTAINER_multipeermap_put (plugin->sessions,
1668 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1669 GNUNET_STATISTICS_set(plugin->env->stats,
1670 "# UDP, sessions active",
1671 GNUNET_CONTAINER_multipeermap_size(plugin->sessions),
1678 * Creates a new outbound session the transport service will use to send data to the
1681 * @param cls the plugin
1682 * @param address the address
1683 * @return the session or NULL of max connections exceeded
1685 static struct Session *
1686 udp_plugin_get_session (void *cls,
1687 const struct GNUNET_HELLO_Address *address)
1691 if (NULL == address)
1696 if ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1697 (address->address_length != sizeof (struct IPv6UdpAddress)))
1700 /* otherwise create new */
1701 if (NULL != (s = udp_plugin_lookup_session (cls, address, GNUNET_NO)))
1703 return udp_plugin_create_session (cls, address, GNUNET_NO);
1708 enqueue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1710 if (plugin->bytes_in_buffer + udpw->msg_size > INT64_MAX)
1714 GNUNET_STATISTICS_update (plugin->env->stats,
1715 "# UDP, total, bytes in buffers",
1716 udpw->msg_size, GNUNET_NO);
1717 plugin->bytes_in_buffer += udpw->msg_size;
1719 GNUNET_STATISTICS_update (plugin->env->stats,
1720 "# UDP, total, msgs in buffers",
1722 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1723 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_queue_head,
1724 plugin->ipv4_queue_tail, udpw);
1725 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1726 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_queue_head,
1727 plugin->ipv6_queue_tail, udpw);
1733 * Fragment message was transmitted via UDP, let fragmentation know
1734 * to send the next fragment now.
1736 * @param cls the 'struct UDPMessageWrapper' of the fragment
1737 * @param target destination peer (ignored)
1738 * @param result GNUNET_OK on success (ignored)
1739 * @param payload bytes payload sent
1740 * @param physical bytes physical sent
1743 send_next_fragment (void *cls,
1744 const struct GNUNET_PeerIdentity *target,
1745 int result, size_t payload, size_t physical)
1747 struct UDP_MessageWrapper *udpw = cls;
1749 GNUNET_FRAGMENT_context_transmission_done (udpw->frag_ctx->frag);
1754 * Function that is called with messages created by the fragmentation
1755 * module. In the case of the 'proc' callback of the
1756 * GNUNET_FRAGMENT_context_create function, this function must
1757 * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
1759 * @param cls closure, the 'struct FragmentationContext'
1760 * @param msg the message that was created
1763 enqueue_fragment (void *cls, const struct GNUNET_MessageHeader *msg)
1765 struct UDP_FragmentationContext *frag_ctx = cls;
1766 struct Plugin *plugin = frag_ctx->plugin;
1767 struct UDP_MessageWrapper * udpw;
1768 size_t msg_len = ntohs (msg->size);
1770 LOG (GNUNET_ERROR_TYPE_DEBUG,
1771 "Enqueuing fragment with %u bytes\n", msg_len);
1772 frag_ctx->fragments_used ++;
1773 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msg_len);
1774 udpw->session = frag_ctx->session;
1775 udpw->msg_buf = (char *) &udpw[1];
1776 udpw->msg_size = msg_len;
1777 udpw->payload_size = msg_len; /*FIXME: minus fragment overhead */
1778 udpw->cont = &send_next_fragment;
1779 udpw->cont_cls = udpw;
1780 udpw->timeout = frag_ctx->timeout;
1781 udpw->frag_ctx = frag_ctx;
1782 udpw->msg_type = MSG_FRAGMENTED;
1783 memcpy (udpw->msg_buf, msg, msg_len);
1784 enqueue (plugin, udpw);
1785 schedule_select (plugin);
1790 * Function that can be used by the transport service to transmit
1791 * a message using the plugin. Note that in the case of a
1792 * peer disconnecting, the continuation MUST be called
1793 * prior to the disconnect notification itself. This function
1794 * will be called with this peer's HELLO message to initiate
1795 * a fresh connection to another peer.
1797 * @param cls closure
1798 * @param s which session must be used
1799 * @param msgbuf the message to transmit
1800 * @param msgbuf_size number of bytes in 'msgbuf'
1801 * @param priority how important is the message (most plugins will
1802 * ignore message priority and just FIFO)
1803 * @param to how long to wait at most for the transmission (does not
1804 * require plugins to discard the message after the timeout,
1805 * just advisory for the desired delay; most plugins will ignore
1807 * @param cont continuation to call once the message has
1808 * been transmitted (or if the transport is ready
1809 * for the next transmission call; or if the
1810 * peer disconnected...); can be NULL
1811 * @param cont_cls closure for cont
1812 * @return number of bytes used (on the physical network, with overheads);
1813 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1814 * and does NOT mean that the message was not transmitted (DV)
1817 udp_plugin_send (void *cls,
1819 const char *msgbuf, size_t msgbuf_size,
1820 unsigned int priority,
1821 struct GNUNET_TIME_Relative to,
1822 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1824 struct Plugin *plugin = cls;
1825 size_t udpmlen = msgbuf_size + sizeof (struct UDPMessage);
1826 struct UDP_FragmentationContext * frag_ctx;
1827 struct UDP_MessageWrapper * udpw;
1828 struct UDPMessage *udp;
1830 GNUNET_assert (plugin != NULL);
1831 GNUNET_assert (s != NULL);
1833 if ((s->addrlen == sizeof (struct sockaddr_in6)) && (plugin->sockv6 == NULL))
1834 return GNUNET_SYSERR;
1835 if ((s->addrlen == sizeof (struct sockaddr_in)) && (plugin->sockv4 == NULL))
1836 return GNUNET_SYSERR;
1837 if (udpmlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1840 return GNUNET_SYSERR;
1842 if (GNUNET_YES != GNUNET_CONTAINER_multipeermap_contains_value(plugin->sessions, &s->target, s))
1845 return GNUNET_SYSERR;
1847 LOG (GNUNET_ERROR_TYPE_DEBUG,
1848 "UDP transmits %u-byte message to `%s' using address `%s'\n",
1850 GNUNET_i2s (&s->target),
1851 GNUNET_a2s(s->sock_addr, s->addrlen));
1855 udp = (struct UDPMessage *) mbuf;
1856 udp->header.size = htons (udpmlen);
1857 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
1858 udp->reserved = htonl (0);
1859 udp->sender = *plugin->env->my_identity;
1861 reschedule_session_timeout(s);
1862 if (udpmlen <= UDP_MTU)
1864 /* unfragmented message */
1865 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + udpmlen);
1867 udpw->msg_buf = (char *) &udpw[1];
1868 udpw->msg_size = udpmlen; /* message size with UDP overhead */
1869 udpw->payload_size = msgbuf_size; /* message size without UDP overhead */
1870 udpw->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1872 udpw->cont_cls = cont_cls;
1873 udpw->frag_ctx = NULL;
1874 udpw->msg_type = MSG_UNFRAGMENTED;
1875 memcpy (udpw->msg_buf, udp, sizeof (struct UDPMessage));
1876 memcpy (&udpw->msg_buf[sizeof (struct UDPMessage)], msgbuf, msgbuf_size);
1877 enqueue (plugin, udpw);
1879 GNUNET_STATISTICS_update (plugin->env->stats,
1880 "# UDP, unfragmented msgs, messages, attempt",
1882 GNUNET_STATISTICS_update (plugin->env->stats,
1883 "# UDP, unfragmented msgs, bytes payload, attempt",
1884 udpw->payload_size, GNUNET_NO);
1888 /* fragmented message */
1889 if (s->frag_ctx != NULL)
1890 return GNUNET_SYSERR;
1891 memcpy (&udp[1], msgbuf, msgbuf_size);
1892 frag_ctx = GNUNET_malloc (sizeof (struct UDP_FragmentationContext));
1893 frag_ctx->plugin = plugin;
1894 frag_ctx->session = s;
1895 frag_ctx->cont = cont;
1896 frag_ctx->cont_cls = cont_cls;
1897 frag_ctx->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1898 frag_ctx->payload_size = msgbuf_size; /* unfragmented message size without UDP overhead */
1899 frag_ctx->on_wire_size = 0; /* bytes with UDP and fragmentation overhead */
1900 frag_ctx->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
1903 s->last_expected_msg_delay,
1904 s->last_expected_ack_delay,
1908 s->frag_ctx = frag_ctx;
1909 GNUNET_STATISTICS_update (plugin->env->stats,
1910 "# UDP, fragmented msgs, messages, pending",
1912 GNUNET_STATISTICS_update (plugin->env->stats,
1913 "# UDP, fragmented msgs, messages, attempt",
1915 GNUNET_STATISTICS_update (plugin->env->stats,
1916 "# UDP, fragmented msgs, bytes payload, attempt",
1917 frag_ctx->payload_size, GNUNET_NO);
1919 schedule_select (plugin);
1925 * Our external IP address/port mapping has changed.
1927 * @param cls closure, the 'struct LocalAddrList'
1928 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1929 * the previous (now invalid) one
1930 * @param addr either the previous or the new public IP address
1931 * @param addrlen actual lenght of the address
1934 udp_nat_port_map_callback (void *cls, int add_remove,
1935 const struct sockaddr *addr, socklen_t addrlen)
1937 struct Plugin *plugin = cls;
1938 struct IPv4UdpAddress u4;
1939 struct IPv6UdpAddress u6;
1943 LOG (GNUNET_ERROR_TYPE_INFO,
1944 "NAT notification to %s address `%s'\n",
1945 (GNUNET_YES == add_remove) ? "add" : "remove",
1946 GNUNET_a2s (addr, addrlen));
1948 /* convert 'addr' to our internal format */
1949 switch (addr->sa_family)
1952 GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
1953 memset (&u4, 0, sizeof (u4));
1954 u4.options = htonl(myoptions);
1955 u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1956 u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
1957 if (0 == ((struct sockaddr_in *) addr)->sin_port)
1960 args = sizeof (struct IPv4UdpAddress);
1963 GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
1964 memset (&u4, 0, sizeof (u4));
1965 u6.options = htonl(myoptions);
1966 if (0 == ((struct sockaddr_in6 *) addr)->sin6_port)
1968 memcpy (&u6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
1969 sizeof (struct in6_addr));
1970 u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
1972 args = sizeof (struct IPv6UdpAddress);
1978 /* modify our published address list */
1979 plugin->env->notify_address (plugin->env->cls, add_remove, arg, args, "udp");
1985 * Message tokenizer has broken up an incomming message. Pass it on
1988 * @param cls the 'struct Plugin'
1989 * @param client the `struct SourceInformation`
1990 * @param hdr the actual message
1991 * @return #GNUNET_OK (always)
1994 process_inbound_tokenized_messages (void *cls, void *client,
1995 const struct GNUNET_MessageHeader *hdr)
1997 struct Plugin *plugin = cls;
1998 struct SourceInformation *si = client;
1999 struct GNUNET_TIME_Relative delay;
2001 GNUNET_assert (si->session != NULL);
2002 if (GNUNET_YES == si->session->in_destroy)
2005 GNUNET_break (ntohl(si->session->ats.value) != GNUNET_ATS_NET_UNSPECIFIED);
2006 reschedule_session_timeout (si->session);
2007 delay = plugin->env->receive (plugin->env->cls,
2011 (GNUNET_YES == si->session->inbound)
2013 (GNUNET_YES == si->session->inbound)
2015 plugin->env->update_address_metrics (plugin->env->cls,
2017 (GNUNET_YES == si->session->inbound) ? NULL : si->arg,
2018 (GNUNET_YES == si->session->inbound) ? 0 : si->args,
2020 &si->session->ats, 1);
2021 si->session->flow_delay_for_other_peer = delay;
2027 * We've received a UDP Message. Process it (pass contents to main service).
2029 * @param plugin plugin context
2030 * @param msg the message
2031 * @param sender_addr sender address
2032 * @param sender_addr_len number of bytes in sender_addr
2035 process_udp_message (struct Plugin *plugin, const struct UDPMessage *msg,
2036 const struct sockaddr *sender_addr,
2037 socklen_t sender_addr_len)
2039 struct SourceInformation si;
2041 struct IPv4UdpAddress u4;
2042 struct IPv6UdpAddress u6;
2046 if (0 != ntohl (msg->reserved))
2048 GNUNET_break_op (0);
2051 if (ntohs (msg->header.size) <
2052 sizeof (struct GNUNET_MessageHeader) + sizeof (struct UDPMessage))
2054 GNUNET_break_op (0);
2058 /* convert address */
2059 switch (sender_addr->sa_family)
2062 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in));
2063 memset (&u4, 0, sizeof (u4));
2064 u6.options = htonl (0);
2065 u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
2066 u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
2071 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in6));
2072 memset (&u6, 0, sizeof (u6));
2073 u6.options = htonl (0);
2074 u6.ipv6_addr = ((struct sockaddr_in6 *) sender_addr)->sin6_addr;
2075 u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
2083 LOG (GNUNET_ERROR_TYPE_DEBUG,
2084 "Received message with %u bytes from peer `%s' at `%s'\n",
2085 (unsigned int) ntohs (msg->header.size), GNUNET_i2s (&msg->sender),
2086 GNUNET_a2s (sender_addr, sender_addr_len));
2088 struct GNUNET_HELLO_Address * address = GNUNET_HELLO_address_allocate(&msg->sender, "udp", arg, args);
2089 if (NULL == (s = udp_plugin_lookup_session (plugin, address, GNUNET_YES)))
2091 s = udp_plugin_create_session (plugin, address, GNUNET_YES);
2092 plugin->env->session_start (NULL, &address->peer, PLUGIN_NAME,
2093 address->address, address->address_length, s, NULL, 0);
2095 GNUNET_free (address);
2097 /* iterate over all embedded messages */
2099 si.sender = msg->sender;
2103 GNUNET_SERVER_mst_receive (plugin->mst,
2105 (const char *) &msg[1],
2106 ntohs (msg->header.size) - sizeof (struct UDPMessage),
2110 if ( (0 == s->rc) && (GNUNET_YES == s->in_destroy))
2116 * Scan the heap for a receive context with the given address.
2118 * @param cls the `struct FindReceiveContext`
2119 * @param node internal node of the heap
2120 * @param element value stored at the node (a 'struct ReceiveContext')
2121 * @param cost cost associated with the node
2122 * @return #GNUNET_YES if we should continue to iterate,
2123 * #GNUNET_NO if not.
2126 find_receive_context (void *cls, struct GNUNET_CONTAINER_HeapNode *node,
2127 void *element, GNUNET_CONTAINER_HeapCostType cost)
2129 struct FindReceiveContext *frc = cls;
2130 struct DefragContext *e = element;
2132 if ((frc->addr_len == e->addr_len) &&
2133 (0 == memcmp (frc->addr, e->src_addr, frc->addr_len)))
2143 * Process a defragmented message.
2145 * @param cls the 'struct ReceiveContext'
2146 * @param msg the message
2149 fragment_msg_proc (void *cls, const struct GNUNET_MessageHeader *msg)
2151 struct DefragContext *rc = cls;
2153 if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
2158 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2163 process_udp_message (rc->plugin, (const struct UDPMessage *) msg,
2164 rc->src_addr, rc->addr_len);
2168 struct LookupContext
2170 struct Session *res;
2172 const struct sockaddr * addr;
2176 int must_have_frag_ctx;
2181 lookup_session_by_addr_it (void *cls,
2182 const struct GNUNET_PeerIdentity *key,
2185 struct LookupContext *l_ctx = cls;
2186 struct Session * s = value;
2188 if ((GNUNET_YES == l_ctx->must_have_frag_ctx) && (NULL == s->frag_ctx))
2192 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Comparing session: have %s %s %p<-> want %s\n",
2193 GNUNET_a2s(s->sock_addr, s->addrlen),
2194 (GNUNET_YES == s->inbound) ? "inbound" : "outbound",
2196 GNUNET_a2s(l_ctx->addr, l_ctx->addrlen));
2198 if ((s->addrlen == l_ctx->addrlen) &&
2199 (0 == memcmp (s->sock_addr, l_ctx->addr, s->addrlen)))
2209 * Transmit an acknowledgement.
2211 * @param cls the 'struct ReceiveContext'
2212 * @param id message ID (unused)
2213 * @param msg ack to transmit
2216 ack_proc (void *cls, uint32_t id, const struct GNUNET_MessageHeader *msg)
2218 struct DefragContext *rc = cls;
2219 size_t msize = sizeof (struct UDP_ACK_Message) + ntohs (msg->size);
2220 struct UDP_ACK_Message *udp_ack;
2222 struct UDP_MessageWrapper *udpw;
2224 struct LookupContext l_ctx;
2226 l_ctx.addr = rc->src_addr;
2227 l_ctx.addrlen = rc->addr_len;
2229 l_ctx.must_have_frag_ctx = GNUNET_NO;
2230 GNUNET_CONTAINER_multipeermap_iterate (rc->plugin->sessions,
2231 &lookup_session_by_addr_it,
2238 if (s->flow_delay_for_other_peer.rel_value_us <= UINT32_MAX)
2239 delay = s->flow_delay_for_other_peer.rel_value_us;
2241 LOG (GNUNET_ERROR_TYPE_DEBUG,
2242 "Sending ACK to `%s' including delay of %s\n",
2243 GNUNET_a2s (rc->src_addr,
2244 (rc->src_addr->sa_family ==
2245 AF_INET) ? sizeof (struct sockaddr_in) : sizeof (struct
2247 GNUNET_STRINGS_relative_time_to_string (s->flow_delay_for_other_peer,
2249 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msize);
2250 udpw->msg_size = msize;
2251 udpw->payload_size = 0;
2253 udpw->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
2254 udpw->msg_buf = (char *)&udpw[1];
2255 udpw->msg_type = MSG_ACK;
2256 udp_ack = (struct UDP_ACK_Message *) udpw->msg_buf;
2257 udp_ack->header.size = htons ((uint16_t) msize);
2258 udp_ack->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
2259 udp_ack->delay = htonl (delay);
2260 udp_ack->sender = *rc->plugin->env->my_identity;
2261 memcpy (&udp_ack[1], msg, ntohs (msg->size));
2262 enqueue (rc->plugin, udpw);
2267 read_process_msg (struct Plugin *plugin,
2268 const struct GNUNET_MessageHeader *msg,
2269 const struct sockaddr *addr,
2272 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2274 GNUNET_break_op (0);
2277 process_udp_message (plugin, (const struct UDPMessage *) msg,
2283 read_process_ack (struct Plugin *plugin,
2284 const struct GNUNET_MessageHeader *msg,
2285 const struct sockaddr *addr,
2288 const struct GNUNET_MessageHeader *ack;
2289 const struct UDP_ACK_Message *udp_ack;
2290 struct LookupContext l_ctx;
2292 struct GNUNET_TIME_Relative flow_delay;
2294 if (ntohs (msg->size) <
2295 sizeof (struct UDP_ACK_Message) + sizeof (struct GNUNET_MessageHeader))
2297 GNUNET_break_op (0);
2300 udp_ack = (const struct UDP_ACK_Message *) msg;
2301 l_ctx.addr = (const struct sockaddr *) addr;
2302 l_ctx.addrlen = fromlen;
2304 l_ctx.must_have_frag_ctx = GNUNET_YES;
2305 GNUNET_CONTAINER_multipeermap_iterate (plugin->sessions,
2306 &lookup_session_by_addr_it,
2309 if ((NULL == s) || (NULL == s->frag_ctx))
2315 flow_delay.rel_value_us = (uint64_t) ntohl (udp_ack->delay);
2316 LOG (GNUNET_ERROR_TYPE_DEBUG,
2317 "We received a sending delay of %s\n",
2318 GNUNET_STRINGS_relative_time_to_string (flow_delay,
2320 s->flow_delay_from_other_peer =
2321 GNUNET_TIME_relative_to_absolute (flow_delay);
2323 ack = (const struct GNUNET_MessageHeader *) &udp_ack[1];
2324 if (ntohs (ack->size) !=
2325 ntohs (msg->size) - sizeof (struct UDP_ACK_Message))
2327 GNUNET_break_op (0);
2331 if (0 != memcmp (&l_ctx.res->target, &udp_ack->sender, sizeof (struct GNUNET_PeerIdentity)))
2333 if (GNUNET_OK != GNUNET_FRAGMENT_process_ack (s->frag_ctx->frag, ack))
2335 LOG (GNUNET_ERROR_TYPE_DEBUG,
2336 "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
2337 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2338 GNUNET_a2s (addr, fromlen));
2339 /* Expect more ACKs to arrive */
2343 LOG (GNUNET_ERROR_TYPE_DEBUG,
2344 "Message full ACK'ed\n",
2345 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2346 GNUNET_a2s (addr, fromlen));
2348 /* Remove fragmented message after successful sending */
2349 fragmented_message_done (s->frag_ctx, GNUNET_OK);
2354 read_process_fragment (struct Plugin *plugin,
2355 const struct GNUNET_MessageHeader *msg,
2356 const struct sockaddr *addr,
2359 struct DefragContext *d_ctx;
2360 struct GNUNET_TIME_Absolute now;
2361 struct FindReceiveContext frc;
2365 frc.addr_len = fromlen;
2367 LOG (GNUNET_ERROR_TYPE_DEBUG, "UDP processes %u-byte fragment from `%s'\n",
2368 (unsigned int) ntohs (msg->size),
2369 GNUNET_a2s (addr, fromlen));
2370 /* Lookup existing receive context for this address */
2371 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
2372 &find_receive_context,
2374 now = GNUNET_TIME_absolute_get ();
2379 /* Create a new defragmentation context */
2380 d_ctx = GNUNET_malloc (sizeof (struct DefragContext) + fromlen);
2381 memcpy (&d_ctx[1], addr, fromlen);
2382 d_ctx->src_addr = (const struct sockaddr *) &d_ctx[1];
2383 d_ctx->addr_len = fromlen;
2384 d_ctx->plugin = plugin;
2386 GNUNET_DEFRAGMENT_context_create (plugin->env->stats, UDP_MTU,
2387 UDP_MAX_MESSAGES_IN_DEFRAG, d_ctx,
2388 &fragment_msg_proc, &ack_proc);
2390 GNUNET_CONTAINER_heap_insert (plugin->defrag_ctxs, d_ctx,
2391 (GNUNET_CONTAINER_HeapCostType)
2393 LOG (GNUNET_ERROR_TYPE_DEBUG,
2394 "Created new defragmentation context for %u-byte fragment from `%s'\n",
2395 (unsigned int) ntohs (msg->size),
2396 GNUNET_a2s (addr, fromlen));
2400 LOG (GNUNET_ERROR_TYPE_DEBUG,
2401 "Found existing defragmentation context for %u-byte fragment from `%s'\n",
2402 (unsigned int) ntohs (msg->size),
2403 GNUNET_a2s (addr, fromlen));
2406 if (GNUNET_OK == GNUNET_DEFRAGMENT_process_fragment (d_ctx->defrag, msg))
2408 /* keep this 'rc' from expiring */
2409 GNUNET_CONTAINER_heap_update_cost (plugin->defrag_ctxs, d_ctx->hnode,
2410 (GNUNET_CONTAINER_HeapCostType)
2413 if (GNUNET_CONTAINER_heap_get_size (plugin->defrag_ctxs) >
2414 UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
2416 /* remove 'rc' that was inactive the longest */
2417 d_ctx = GNUNET_CONTAINER_heap_remove_root (plugin->defrag_ctxs);
2418 GNUNET_assert (NULL != d_ctx);
2419 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
2420 GNUNET_free (d_ctx);
2426 * Read and process a message from the given socket.
2428 * @param plugin the overall plugin
2429 * @param rsock socket to read from
2432 udp_select_read (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *rsock)
2435 struct sockaddr_storage addr;
2436 char buf[65536] GNUNET_ALIGN;
2438 const struct GNUNET_MessageHeader *msg;
2440 fromlen = sizeof (addr);
2441 memset (&addr, 0, sizeof (addr));
2442 size = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof (buf),
2443 (struct sockaddr *) &addr, &fromlen);
2445 /* On SOCK_DGRAM UDP sockets recvfrom might fail with a
2446 * WSAECONNRESET error to indicate that previous sendto() (yes, sendto!)
2447 * on this socket has failed.
2449 * WSAECONNRESET - The virtual circuit was reset by the remote side
2450 * executing a hard or abortive close. The application should close
2451 * the socket; it is no longer usable. On a UDP-datagram socket this
2452 * error indicates a previous send operation resulted in an ICMP Port
2453 * Unreachable message.
2455 if ( (-1 == size) && (ECONNRESET == errno) )
2460 LOG (GNUNET_ERROR_TYPE_DEBUG,
2461 "UDP failed to receive data: %s\n", STRERROR (errno));
2462 /* Connection failure or something. Not a protocol violation. */
2465 if (size < sizeof (struct GNUNET_MessageHeader))
2467 LOG (GNUNET_ERROR_TYPE_WARNING,
2468 "UDP got %u bytes, which is not enough for a GNUnet message header\n",
2469 (unsigned int) size);
2470 /* _MAY_ be a connection failure (got partial message) */
2471 /* But it _MAY_ also be that the other side uses non-GNUnet protocol. */
2472 GNUNET_break_op (0);
2475 msg = (const struct GNUNET_MessageHeader *) buf;
2477 LOG (GNUNET_ERROR_TYPE_DEBUG,
2478 "UDP received %u-byte message from `%s' type %u\n",
2479 (unsigned int) size,
2480 GNUNET_a2s ((const struct sockaddr *) &addr, fromlen),
2483 if (size != ntohs (msg->size))
2485 GNUNET_break_op (0);
2489 GNUNET_STATISTICS_update (plugin->env->stats,
2490 "# UDP, total, bytes, received",
2493 switch (ntohs (msg->type))
2495 case GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON:
2496 udp_broadcast_receive (plugin, buf, size,
2497 (const struct sockaddr *) &addr, fromlen);
2499 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
2500 read_process_msg (plugin, msg,
2501 (const struct sockaddr *) &addr, fromlen);
2503 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
2504 read_process_ack (plugin, msg,
2505 (const struct sockaddr *) &addr, fromlen);
2507 case GNUNET_MESSAGE_TYPE_FRAGMENT:
2508 read_process_fragment (plugin, msg,
2509 (const struct sockaddr *) &addr, fromlen);
2512 GNUNET_break_op (0);
2518 static struct UDP_MessageWrapper *
2519 remove_timeout_messages_and_select (struct UDP_MessageWrapper *head,
2520 struct GNUNET_NETWORK_Handle *sock)
2522 struct UDP_MessageWrapper *udpw = NULL;
2523 struct GNUNET_TIME_Relative remaining;
2526 while (udpw != NULL)
2528 /* Find messages with timeout */
2529 remaining = GNUNET_TIME_absolute_get_remaining (udpw->timeout);
2530 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2532 /* Message timed out */
2533 switch (udpw->msg_type) {
2534 case MSG_UNFRAGMENTED:
2535 GNUNET_STATISTICS_update (plugin->env->stats,
2536 "# UDP, total, bytes, sent, timeout",
2537 udpw->msg_size, GNUNET_NO);
2538 GNUNET_STATISTICS_update (plugin->env->stats,
2539 "# UDP, total, messages, sent, timeout",
2541 GNUNET_STATISTICS_update (plugin->env->stats,
2542 "# UDP, unfragmented msgs, messages, sent, timeout",
2544 GNUNET_STATISTICS_update (plugin->env->stats,
2545 "# UDP, unfragmented msgs, bytes, sent, timeout",
2546 udpw->payload_size, GNUNET_NO);
2547 /* Not fragmented message */
2548 LOG (GNUNET_ERROR_TYPE_DEBUG,
2549 "Message for peer `%s' with size %u timed out\n",
2550 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2551 call_continuation (udpw, GNUNET_SYSERR);
2552 /* Remove message */
2553 dequeue (plugin, udpw);
2556 case MSG_FRAGMENTED:
2557 /* Fragmented message */
2558 GNUNET_STATISTICS_update (plugin->env->stats,
2559 "# UDP, total, bytes, sent, timeout",
2560 udpw->frag_ctx->on_wire_size, GNUNET_NO);
2561 GNUNET_STATISTICS_update (plugin->env->stats,
2562 "# UDP, total, messages, sent, timeout",
2564 call_continuation (udpw, GNUNET_SYSERR);
2565 LOG (GNUNET_ERROR_TYPE_DEBUG,
2566 "Fragment for message for peer `%s' with size %u timed out\n",
2567 GNUNET_i2s(&udpw->session->target), udpw->frag_ctx->payload_size);
2570 GNUNET_STATISTICS_update (plugin->env->stats,
2571 "# UDP, fragmented msgs, messages, sent, timeout",
2573 GNUNET_STATISTICS_update (plugin->env->stats,
2574 "# UDP, fragmented msgs, bytes, sent, timeout",
2575 udpw->frag_ctx->payload_size, GNUNET_NO);
2576 /* Remove fragmented message due to timeout */
2577 fragmented_message_done (udpw->frag_ctx, GNUNET_SYSERR);
2580 GNUNET_STATISTICS_update (plugin->env->stats,
2581 "# UDP, total, bytes, sent, timeout",
2582 udpw->msg_size, GNUNET_NO);
2583 GNUNET_STATISTICS_update (plugin->env->stats,
2584 "# UDP, total, messages, sent, timeout",
2586 LOG (GNUNET_ERROR_TYPE_DEBUG,
2587 "ACK Message for peer `%s' with size %u timed out\n",
2588 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2589 call_continuation (udpw, GNUNET_SYSERR);
2590 dequeue (plugin, udpw);
2596 if (sock == plugin->sockv4)
2597 udpw = plugin->ipv4_queue_head;
2598 else if (sock == plugin->sockv6)
2599 udpw = plugin->ipv6_queue_head;
2602 GNUNET_break (0); /* should never happen */
2605 GNUNET_STATISTICS_update (plugin->env->stats,
2606 "# messages dismissed due to timeout",
2611 /* Message did not time out, check flow delay */
2612 remaining = GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer);
2613 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2615 /* this message is not delayed */
2616 LOG (GNUNET_ERROR_TYPE_DEBUG,
2617 "Message for peer `%s' (%u bytes) is not delayed \n",
2618 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2619 break; /* Found message to send, break */
2623 /* Message is delayed, try next */
2624 LOG (GNUNET_ERROR_TYPE_DEBUG,
2625 "Message for peer `%s' (%u bytes) is delayed for %s\n",
2626 GNUNET_i2s(&udpw->session->target), udpw->payload_size,
2627 GNUNET_STRINGS_relative_time_to_string (remaining,
2638 analyze_send_error (struct Plugin *plugin,
2639 const struct sockaddr * sa,
2643 static int network_down_error;
2644 struct GNUNET_ATS_Information type;
2646 type = plugin->env->get_address_type (plugin->env->cls,sa, slen);
2647 if (((GNUNET_ATS_NET_LAN == ntohl(type.value)) || (GNUNET_ATS_NET_WAN == ntohl(type.value))) &&
2648 ((ENETUNREACH == errno) || (ENETDOWN == errno)))
2650 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in)))
2652 /* IPv4: "Network unreachable" or "Network down"
2654 * This indicates we do not have connectivity
2656 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2657 _("UDP could not transmit message to `%s': "
2658 "Network seems down, please check your network configuration\n"),
2659 GNUNET_a2s (sa, slen));
2661 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in6)))
2663 /* IPv6: "Network unreachable" or "Network down"
2665 * This indicates that this system is IPv6 enabled, but does not
2666 * have a valid global IPv6 address assigned or we do not have
2670 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2671 _("UDP could not transmit IPv6 message! "
2672 "Please check your network configuration and disable IPv6 if your "
2673 "connection does not have a global IPv6 address\n"));
2678 LOG (GNUNET_ERROR_TYPE_WARNING,
2679 "UDP could not transmit message to `%s': `%s'\n",
2680 GNUNET_a2s (sa, slen), STRERROR (error));
2686 udp_select_send (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *sock)
2688 const struct sockaddr * sa;
2692 struct UDP_MessageWrapper *udpw = NULL;
2694 /* Find message to send */
2695 udpw = remove_timeout_messages_and_select ((sock == plugin->sockv4) ? plugin->ipv4_queue_head : plugin->ipv6_queue_head,
2698 return 0; /* No message to send */
2700 sa = udpw->session->sock_addr;
2701 slen = udpw->session->addrlen;
2703 sent = GNUNET_NETWORK_socket_sendto (sock, udpw->msg_buf, udpw->msg_size, sa, slen);
2705 if (GNUNET_SYSERR == sent)
2708 analyze_send_error (plugin, sa, slen, errno);
2709 call_continuation(udpw, GNUNET_SYSERR);
2710 GNUNET_STATISTICS_update (plugin->env->stats,
2711 "# UDP, total, bytes, sent, failure",
2713 GNUNET_STATISTICS_update (plugin->env->stats,
2714 "# UDP, total, messages, sent, failure",
2720 LOG (GNUNET_ERROR_TYPE_DEBUG,
2721 "UDP transmitted %u-byte message to `%s' `%s' (%d: %s)\n",
2722 (unsigned int) (udpw->msg_size), GNUNET_i2s(&udpw->session->target) ,GNUNET_a2s (sa, slen), (int) sent,
2723 (sent < 0) ? STRERROR (errno) : "ok");
2724 GNUNET_STATISTICS_update (plugin->env->stats,
2725 "# UDP, total, bytes, sent, success",
2727 GNUNET_STATISTICS_update (plugin->env->stats,
2728 "# UDP, total, messages, sent, success",
2730 if (NULL != udpw->frag_ctx)
2731 udpw->frag_ctx->on_wire_size += udpw->msg_size;
2732 call_continuation (udpw, GNUNET_OK);
2734 dequeue (plugin, udpw);
2743 * We have been notified that our readset has something to read. We don't
2744 * know which socket needs to be read, so we have to check each one
2745 * Then reschedule this function to be called again once more is available.
2747 * @param cls the plugin handle
2748 * @param tc the scheduling context (for rescheduling this function again)
2751 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2753 struct Plugin *plugin = cls;
2755 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
2756 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2758 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
2759 (NULL != plugin->sockv4) &&
2760 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv4)) )
2761 udp_select_read (plugin, plugin->sockv4);
2762 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2763 (NULL != plugin->sockv4) &&
2764 (NULL != plugin->ipv4_queue_head) &&
2765 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv4)) )
2766 udp_select_send (plugin, plugin->sockv4);
2767 schedule_select (plugin);
2772 * We have been notified that our readset has something to read. We don't
2773 * know which socket needs to be read, so we have to check each one
2774 * Then reschedule this function to be called again once more is available.
2776 * @param cls the plugin handle
2777 * @param tc the scheduling context (for rescheduling this function again)
2780 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2782 struct Plugin *plugin = cls;
2784 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2785 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2787 if ( ((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0) &&
2788 (NULL != plugin->sockv6) &&
2789 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv6)) )
2790 udp_select_read (plugin, plugin->sockv6);
2791 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2792 (NULL != plugin->sockv6) && (plugin->ipv6_queue_head != NULL) &&
2793 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv6)) )
2794 udp_select_send (plugin, plugin->sockv6);
2795 schedule_select (plugin);
2801 * @return number of sockets that were successfully bound
2804 setup_sockets (struct Plugin *plugin,
2805 const struct sockaddr_in6 *bind_v6,
2806 const struct sockaddr_in *bind_v4)
2809 int sockets_created = 0;
2810 struct sockaddr_in6 server_addrv6;
2811 struct sockaddr_in server_addrv4;
2812 struct sockaddr *server_addr;
2813 struct sockaddr *addrs[2];
2814 socklen_t addrlens[2];
2818 /* Create IPv6 socket */
2820 if (plugin->enable_ipv6 == GNUNET_YES)
2822 plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
2823 if (NULL == plugin->sockv6)
2825 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv6 since it is not supported on this system!\n");
2826 plugin->enable_ipv6 = GNUNET_NO;
2830 memset (&server_addrv6, '\0', sizeof (struct sockaddr_in6));
2831 #if HAVE_SOCKADDR_IN_SIN_LEN
2832 server_addrv6.sin6_len = sizeof (struct sockaddr_in6);
2834 server_addrv6.sin6_family = AF_INET6;
2835 if (NULL != bind_v6)
2836 server_addrv6.sin6_addr = bind_v6->sin6_addr;
2838 server_addrv6.sin6_addr = in6addr_any;
2840 if (0 == plugin->port) /* autodetect */
2841 server_addrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2843 server_addrv6.sin6_port = htons (plugin->port);
2844 addrlen = sizeof (struct sockaddr_in6);
2845 server_addr = (struct sockaddr *) &server_addrv6;
2850 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv6 `%s'\n",
2851 GNUNET_a2s (server_addr, addrlen));
2853 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv6,
2854 server_addr, addrlen))
2857 if (0 != plugin->port)
2859 tries = 10; /* fail */
2860 break; /* bind failed on specific port */
2863 server_addrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2868 GNUNET_NETWORK_socket_close (plugin->sockv6);
2869 plugin->enable_ipv6 = GNUNET_NO;
2870 plugin->sockv6 = NULL;
2873 if (plugin->sockv6 != NULL)
2875 LOG (GNUNET_ERROR_TYPE_DEBUG,
2876 "IPv6 socket created on port %s\n",
2877 GNUNET_a2s (server_addr, addrlen));
2878 addrs[sockets_created] = (struct sockaddr *) &server_addrv6;
2879 addrlens[sockets_created] = sizeof (struct sockaddr_in6);
2884 LOG (GNUNET_ERROR_TYPE_ERROR,
2885 "Failed to bind UDP socket to %s: %s\n",
2886 GNUNET_a2s (server_addr, addrlen),
2892 /* Create IPv4 socket */
2894 plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
2895 if (NULL == plugin->sockv4)
2897 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2898 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv4 since it is not supported on this system!\n");
2899 plugin->enable_ipv4 = GNUNET_NO;
2903 memset (&server_addrv4, '\0', sizeof (struct sockaddr_in));
2904 #if HAVE_SOCKADDR_IN_SIN_LEN
2905 server_addrv4.sin_len = sizeof (struct sockaddr_in);
2907 server_addrv4.sin_family = AF_INET;
2908 if (NULL != bind_v4)
2909 server_addrv4.sin_addr = bind_v4->sin_addr;
2911 server_addrv4.sin_addr.s_addr = INADDR_ANY;
2913 if (0 == plugin->port)
2915 server_addrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2917 server_addrv4.sin_port = htons (plugin->port);
2920 addrlen = sizeof (struct sockaddr_in);
2921 server_addr = (struct sockaddr *) &server_addrv4;
2926 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv4 `%s'\n",
2927 GNUNET_a2s (server_addr, addrlen));
2930 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv4,
2931 server_addr, addrlen))
2934 if (0 != plugin->port)
2936 tries = 10; /* fail */
2937 break; /* bind failed on specific port */
2941 server_addrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2947 GNUNET_NETWORK_socket_close (plugin->sockv4);
2948 plugin->enable_ipv4 = GNUNET_NO;
2949 plugin->sockv4 = NULL;
2952 if (plugin->sockv4 != NULL)
2954 LOG (GNUNET_ERROR_TYPE_DEBUG,
2955 "IPv4 socket created on port %s\n", GNUNET_a2s (server_addr, addrlen));
2956 addrs[sockets_created] = (struct sockaddr *) &server_addrv4;
2957 addrlens[sockets_created] = sizeof (struct sockaddr_in);
2962 LOG (GNUNET_ERROR_TYPE_ERROR,
2963 "Failed to bind UDP socket to %s: %s\n",
2964 GNUNET_a2s (server_addr, addrlen), STRERROR (eno));
2968 if (0 == sockets_created)
2970 LOG (GNUNET_ERROR_TYPE_WARNING, _("Failed to open UDP sockets\n"));
2971 return 0; /* No sockets created, return */
2974 /* Create file descriptors */
2975 if (plugin->enable_ipv4 == GNUNET_YES)
2977 plugin->rs_v4 = GNUNET_NETWORK_fdset_create ();
2978 plugin->ws_v4 = GNUNET_NETWORK_fdset_create ();
2979 GNUNET_NETWORK_fdset_zero (plugin->rs_v4);
2980 GNUNET_NETWORK_fdset_zero (plugin->ws_v4);
2981 if (NULL != plugin->sockv4)
2983 GNUNET_NETWORK_fdset_set (plugin->rs_v4, plugin->sockv4);
2984 GNUNET_NETWORK_fdset_set (plugin->ws_v4, plugin->sockv4);
2988 if (plugin->enable_ipv6 == GNUNET_YES)
2990 plugin->rs_v6 = GNUNET_NETWORK_fdset_create ();
2991 plugin->ws_v6 = GNUNET_NETWORK_fdset_create ();
2992 GNUNET_NETWORK_fdset_zero (plugin->rs_v6);
2993 GNUNET_NETWORK_fdset_zero (plugin->ws_v6);
2994 if (NULL != plugin->sockv6)
2996 GNUNET_NETWORK_fdset_set (plugin->rs_v6, plugin->sockv6);
2997 GNUNET_NETWORK_fdset_set (plugin->ws_v6, plugin->sockv6);
3001 schedule_select (plugin);
3002 plugin->nat = GNUNET_NAT_register (plugin->env->cfg,
3003 GNUNET_NO, plugin->port,
3005 (const struct sockaddr **) addrs, addrlens,
3006 &udp_nat_port_map_callback, NULL, plugin);
3008 return sockets_created;
3013 * The exported method. Makes the core api available via a global and
3014 * returns the udp transport API.
3016 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
3017 * @return our 'struct GNUNET_TRANSPORT_PluginFunctions'
3020 libgnunet_plugin_transport_udp_init (void *cls)
3022 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
3023 struct GNUNET_TRANSPORT_PluginFunctions *api;
3025 unsigned long long port;
3026 unsigned long long aport;
3027 unsigned long long broadcast;
3028 unsigned long long udp_max_bps;
3029 unsigned long long enable_v6;
3030 char * bind4_address;
3031 char * bind6_address;
3032 char * fancy_interval;
3033 struct GNUNET_TIME_Relative interval;
3034 struct sockaddr_in server_addrv4;
3035 struct sockaddr_in6 server_addrv6;
3040 if (NULL == env->receive)
3042 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
3043 initialze the plugin or the API */
3044 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
3046 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3047 api->address_to_string = &udp_address_to_string;
3048 api->string_to_address = &udp_string_to_address;
3052 GNUNET_assert (NULL != env->stats);
3054 /* Get port number: port == 0 : autodetect a port,
3055 * > 0 : use this port, not given : 2086 default */
3057 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp", "PORT",
3061 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3062 "ADVERTISED_PORT", &aport))
3066 LOG (GNUNET_ERROR_TYPE_WARNING,
3067 _("Given `%s' option is out of range: %llu > %u\n"), "PORT", port,
3074 GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "nat",
3076 enable_v6 = GNUNET_NO;
3078 enable_v6 = GNUNET_YES;
3081 have_bind4 = GNUNET_NO;
3082 memset (&server_addrv4, 0, sizeof (server_addrv4));
3084 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3085 "BINDTO", &bind4_address))
3087 LOG (GNUNET_ERROR_TYPE_DEBUG,
3088 "Binding udp plugin to specific address: `%s'\n",
3090 if (1 != inet_pton (AF_INET, bind4_address, &server_addrv4.sin_addr))
3092 GNUNET_free (bind4_address);
3095 have_bind4 = GNUNET_YES;
3097 GNUNET_free_non_null (bind4_address);
3098 have_bind6 = GNUNET_NO;
3099 memset (&server_addrv6, 0, sizeof (server_addrv6));
3101 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3102 "BINDTO6", &bind6_address))
3104 LOG (GNUNET_ERROR_TYPE_DEBUG,
3105 "Binding udp plugin to specific address: `%s'\n",
3108 inet_pton (AF_INET6, bind6_address, &server_addrv6.sin6_addr))
3110 LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid IPv6 address: `%s'\n"),
3112 GNUNET_free (bind6_address);
3115 have_bind6 = GNUNET_YES;
3117 GNUNET_free_non_null (bind6_address);
3119 /* Initialize my flags */
3122 /* Enable neighbour discovery */
3123 broadcast = GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "transport-udp",
3125 if (broadcast == GNUNET_SYSERR)
3126 broadcast = GNUNET_NO;
3128 if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3129 "BROADCAST_INTERVAL", &fancy_interval))
3131 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
3135 if (GNUNET_SYSERR == GNUNET_STRINGS_fancy_time_to_relative(fancy_interval, &interval))
3137 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30);
3139 GNUNET_free (fancy_interval);
3142 /* Maximum datarate */
3143 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3144 "MAX_BPS", &udp_max_bps))
3146 udp_max_bps = 1024 * 1024 * 50; /* 50 MB/s == infinity for practical purposes */
3149 p = GNUNET_new (struct Plugin);
3152 p->broadcast_interval = interval;
3153 p->enable_ipv6 = enable_v6;
3154 p->enable_ipv4 = GNUNET_YES; /* default */
3156 p->sessions = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
3157 p->defrag_ctxs = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
3158 p->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages, p);
3159 GNUNET_BANDWIDTH_tracker_init (&p->tracker,
3160 GNUNET_BANDWIDTH_value_init ((uint32_t) udp_max_bps), 30);
3163 LOG(GNUNET_ERROR_TYPE_DEBUG, "Setting up sockets\n");
3164 res = setup_sockets (p, (GNUNET_YES == have_bind6) ? &server_addrv6 : NULL,
3165 (GNUNET_YES == have_bind4) ? &server_addrv4 : NULL );
3166 if ((res == 0) || ((p->sockv4 == NULL )&& (p->sockv6 == NULL)))
3168 LOG (GNUNET_ERROR_TYPE_ERROR,
3169 _("Failed to create network sockets, plugin failed\n"));
3170 GNUNET_CONTAINER_multipeermap_destroy (p->sessions);
3171 GNUNET_CONTAINER_heap_destroy (p->defrag_ctxs);
3172 GNUNET_SERVER_mst_destroy (p->mst);
3176 else if (broadcast == GNUNET_YES)
3178 LOG (GNUNET_ERROR_TYPE_DEBUG, "Starting broadcasting\n");
3179 setup_broadcast (p, &server_addrv6, &server_addrv4);
3182 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
3185 api->disconnect_session = &udp_disconnect_session;
3186 api->query_keepalive_factor = &udp_query_keepalive_factor;
3187 api->disconnect_peer = &udp_disconnect;
3188 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3189 api->address_to_string = &udp_address_to_string;
3190 api->string_to_address = &udp_string_to_address;
3191 api->check_address = &udp_plugin_check_address;
3192 api->get_session = &udp_plugin_get_session;
3193 api->send = &udp_plugin_send;
3194 api->get_network = &udp_get_network;
3201 heap_cleanup_iterator (void *cls,
3202 struct GNUNET_CONTAINER_HeapNode *node,
3204 GNUNET_CONTAINER_HeapCostType cost)
3206 struct DefragContext * d_ctx = element;
3208 GNUNET_CONTAINER_heap_remove_node (node);
3209 GNUNET_DEFRAGMENT_context_destroy(d_ctx->defrag);
3210 GNUNET_free (d_ctx);
3217 * The exported method. Makes the core api available via a global and
3218 * returns the udp transport API.
3220 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
3224 libgnunet_plugin_transport_udp_done (void *cls)
3226 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
3227 struct Plugin *plugin = api->cls;
3228 struct PrettyPrinterContext *cur;
3229 struct PrettyPrinterContext *next;
3237 stop_broadcast (plugin);
3238 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
3240 GNUNET_SCHEDULER_cancel (plugin->select_task);
3241 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
3243 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK)
3245 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
3246 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
3249 /* Closing sockets */
3250 if (GNUNET_YES == plugin->enable_ipv4)
3252 if (NULL != plugin->sockv4)
3254 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
3255 plugin->sockv4 = NULL;
3257 GNUNET_NETWORK_fdset_destroy (plugin->rs_v4);
3258 GNUNET_NETWORK_fdset_destroy (plugin->ws_v4);
3260 if (GNUNET_YES == plugin->enable_ipv6)
3262 if (NULL != plugin->sockv6)
3264 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
3265 plugin->sockv6 = NULL;
3267 GNUNET_NETWORK_fdset_destroy (plugin->rs_v6);
3268 GNUNET_NETWORK_fdset_destroy (plugin->ws_v6);
3271 if (NULL != plugin->nat)
3273 GNUNET_NAT_unregister (plugin->nat);
3276 if (NULL != plugin->defrag_ctxs)
3278 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
3279 heap_cleanup_iterator, NULL);
3280 GNUNET_CONTAINER_heap_destroy (plugin->defrag_ctxs);
3281 plugin->defrag_ctxs = NULL;
3283 if (plugin->mst != NULL)
3285 GNUNET_SERVER_mst_destroy(plugin->mst);
3289 /* Clean up leftover messages */
3290 struct UDP_MessageWrapper * udpw;
3291 udpw = plugin->ipv4_queue_head;
3292 while (udpw != NULL)
3294 struct UDP_MessageWrapper *tmp = udpw->next;
3295 dequeue (plugin, udpw);
3296 call_continuation(udpw, GNUNET_SYSERR);
3301 udpw = plugin->ipv6_queue_head;
3302 while (udpw != NULL)
3304 struct UDP_MessageWrapper *tmp = udpw->next;
3305 dequeue (plugin, udpw);
3306 call_continuation(udpw, GNUNET_SYSERR);
3312 /* Clean up sessions */
3313 LOG (GNUNET_ERROR_TYPE_DEBUG,
3314 "Cleaning up sessions\n");
3315 GNUNET_CONTAINER_multipeermap_iterate (plugin->sessions, &disconnect_and_free_it, plugin);
3316 GNUNET_CONTAINER_multipeermap_destroy (plugin->sessions);
3318 next = ppc_dll_head;
3319 for (cur = next; NULL != cur; cur = next)
3322 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, cur);
3323 GNUNET_RESOLVER_request_cancel (cur->resolver_handle);
3324 GNUNET_SCHEDULER_cancel (cur->timeout_task);
3330 GNUNET_free (plugin);
3333 struct Allocation *allocation;
3334 while (NULL != ahead)
3337 GNUNET_CONTAINER_DLL_remove (ahead, atail, allocation);
3338 GNUNET_free (allocation);
3340 struct Allocator *allocator;
3341 while (NULL != aehead)
3344 GNUNET_CONTAINER_DLL_remove (aehead, aetail, allocator);
3345 GNUNET_free (allocator);
3352 /* end of plugin_transport_udp.c */