2 This file is part of GNUnet
3 (C) 2010, 2011 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file transport/plugin_transport_udp.c
23 * @brief Implementation of the UDP transport protocol
24 * @author Christian Grothoff
25 * @author Nathan Evans
26 * @author Matthias Wachs
29 #include "plugin_transport_udp.h"
30 #include "gnunet_hello_lib.h"
31 #include "gnunet_util_lib.h"
32 #include "gnunet_fragmentation_lib.h"
33 #include "gnunet_nat_lib.h"
34 #include "gnunet_protocols.h"
35 #include "gnunet_resolver_service.h"
36 #include "gnunet_signatures.h"
37 #include "gnunet_constants.h"
38 #include "gnunet_statistics_service.h"
39 #include "gnunet_transport_service.h"
40 #include "gnunet_transport_plugin.h"
41 #include "transport.h"
43 #define LOG(kind,...) GNUNET_log_from (kind, "transport-udp", __VA_ARGS__)
45 #define PLUGIN_NAME "udp"
48 * Number of messages we can defragment in parallel. We only really
49 * defragment 1 message at a time, but if messages get re-ordered, we
50 * may want to keep knowledge about the previous message to avoid
51 * discarding the current message in favor of a single fragment of a
52 * previous message. 3 should be good since we don't expect massive
53 * message reorderings with UDP.
55 #define UDP_MAX_MESSAGES_IN_DEFRAG 3
58 * We keep a defragmentation queue per sender address. How many
59 * sender addresses do we support at the same time? Memory consumption
60 * is roughly a factor of 32k * UDP_MAX_MESSAGES_IN_DEFRAG times this
61 * value. (So 128 corresponds to 12 MB and should suffice for
62 * connecting to roughly 128 peers via UDP).
64 #define UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG 128
67 * Running pretty printers: head
69 static struct PrettyPrinterContext *ppc_dll_head;
72 * Running pretty printers: tail
74 static struct PrettyPrinterContext *ppc_dll_tail;
77 * Closure for 'append_port'.
79 struct PrettyPrinterContext
84 struct PrettyPrinterContext *next;
89 struct PrettyPrinterContext *prev;
94 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
99 struct GNUNET_RESOLVER_RequestHandle *resolver_handle;
102 * Function to call with the result.
104 GNUNET_TRANSPORT_AddressStringCallback asc;
112 * Port to add after the IP address.
133 MSG_FRAGMENTED_COMPLETE = 2,
134 MSG_UNFRAGMENTED = 3,
142 * Which peer is this session for?
144 struct GNUNET_PeerIdentity target;
146 struct UDP_FragmentationContext * frag_ctx;
149 * Address of the other peer
151 const struct sockaddr *sock_addr;
154 * Desired delay for next sending we send to other peer
156 struct GNUNET_TIME_Relative flow_delay_for_other_peer;
159 * Desired delay for next sending we received from other peer
161 struct GNUNET_TIME_Absolute flow_delay_from_other_peer;
164 * Session timeout task
166 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
169 * expected delay for ACKs
171 struct GNUNET_TIME_Relative last_expected_ack_delay;
174 * desired delay between UDP messages
176 struct GNUNET_TIME_Relative last_expected_msg_delay;
178 struct GNUNET_ATS_Information ats;
191 struct SessionCompareContext
194 const struct GNUNET_HELLO_Address *addr;
199 * Closure for 'process_inbound_tokenized_messages'
201 struct SourceInformation
206 struct GNUNET_PeerIdentity sender;
213 struct Session *session;
215 * Number of bytes in source address.
223 * Closure for 'find_receive_context'.
225 struct FindReceiveContext
228 * Where to store the result.
230 struct DefragContext *rc;
235 const struct sockaddr *addr;
237 struct Session *session;
240 * Number of bytes in 'addr'.
249 * Data structure to track defragmentation contexts based
250 * on the source of the UDP traffic.
256 * Defragmentation context.
258 struct GNUNET_DEFRAGMENT_Context *defrag;
261 * Source address this receive context is for (allocated at the
262 * end of the struct).
264 const struct sockaddr *src_addr;
267 * Reference to master plugin struct.
269 struct Plugin *plugin;
272 * Node in the defrag heap.
274 struct GNUNET_CONTAINER_HeapNode *hnode;
277 * Length of 'src_addr'
285 * Context to send fragmented messages
287 struct UDP_FragmentationContext
290 * Next in linked list
292 struct UDP_FragmentationContext * next;
295 * Previous in linked list
297 struct UDP_FragmentationContext * prev;
302 struct Plugin * plugin;
305 * Handle for GNUNET_FRAGMENT context
307 struct GNUNET_FRAGMENT_Context * frag;
310 * The session this fragmentation context belongs to
312 struct Session * session;
315 * Function to call upon completion of the transmission.
317 GNUNET_TRANSPORT_TransmitContinuation cont;
320 * Closure for 'cont'.
327 struct GNUNET_TIME_Absolute timeout;
330 * Payload size of original unfragmented message
335 * Bytes used to send all fragments on wire including UDP overhead
339 unsigned int fragments_used;
344 struct UDP_MessageWrapper
347 * Session this message belongs to
349 struct Session *session;
355 struct UDP_MessageWrapper *prev;
361 struct UDP_MessageWrapper *next;
365 * According to UDP_MessageType
370 * Message with size msg_size including UDP specific overhead
375 * Size of UDP message to send including UDP specific overhead
380 * Payload size of original message
387 struct GNUNET_TIME_Absolute timeout;
390 * Function to call upon completion of the transmission.
392 GNUNET_TRANSPORT_TransmitContinuation cont;
395 * Closure for 'cont'.
400 * Fragmentation context
401 * frag_ctx == NULL if transport <= MTU
402 * frag_ctx != NULL if transport > MTU
404 struct UDP_FragmentationContext *frag_ctx;
409 * UDP ACK Message-Packet header (after defragmentation).
411 struct UDP_ACK_Message
416 struct GNUNET_MessageHeader header;
419 * Desired delay for flow control
424 * What is the identity of the sender
426 struct GNUNET_PeerIdentity sender;
433 static uint32_t myoptions;
437 * Encapsulation of all of the state of the plugin.
439 struct Plugin * plugin;
443 * We have been notified that our readset has something to read. We don't
444 * know which socket needs to be read, so we have to check each one
445 * Then reschedule this function to be called again once more is available.
447 * @param cls the plugin handle
448 * @param tc the scheduling context (for rescheduling this function again)
451 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
455 * We have been notified that our readset has something to read. We don't
456 * know which socket needs to be read, so we have to check each one
457 * Then reschedule this function to be called again once more is available.
459 * @param cls the plugin handle
460 * @param tc the scheduling context (for rescheduling this function again)
463 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
467 * Start session timeout
470 start_session_timeout (struct Session *s);
473 * Increment session timeout due to activity
476 reschedule_session_timeout (struct Session *s);
482 stop_session_timeout (struct Session *s);
485 * (re)schedule select tasks for this plugin.
487 * @param plugin plugin to reschedule
490 schedule_select (struct Plugin *plugin)
492 struct GNUNET_TIME_Relative min_delay;
493 struct UDP_MessageWrapper *udpw;
495 if ((GNUNET_YES == plugin->enable_ipv4) && (NULL != plugin->sockv4))
497 /* Find a message ready to send:
498 * Flow delay from other peer is expired or not set (0) */
499 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
500 for (udpw = plugin->ipv4_queue_head; NULL != udpw; udpw = udpw->next)
501 min_delay = GNUNET_TIME_relative_min (min_delay,
502 GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer));
504 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
505 GNUNET_SCHEDULER_cancel(plugin->select_task);
508 * - write active set if message is ready
509 * - timeout minimum delay */
510 plugin->select_task =
511 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
512 (0 == min_delay.rel_value) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
514 (0 == min_delay.rel_value) ? plugin->ws_v4 : NULL,
515 &udp_plugin_select, plugin);
517 if ((GNUNET_YES == plugin->enable_ipv6) && (NULL != plugin->sockv6))
519 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
520 for (udpw = plugin->ipv6_queue_head; NULL != udpw; udpw = udpw->next)
521 min_delay = GNUNET_TIME_relative_min (min_delay,
522 GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer));
524 if (GNUNET_SCHEDULER_NO_TASK != plugin->select_task_v6)
525 GNUNET_SCHEDULER_cancel(plugin->select_task_v6);
526 plugin->select_task_v6 =
527 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
528 (0 == min_delay.rel_value) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
530 (0 == min_delay.rel_value) ? plugin->ws_v6 : NULL,
531 &udp_plugin_select_v6, plugin);
537 * Function called for a quick conversion of the binary address to
538 * a numeric address. Note that the caller must not free the
539 * address and that the next call to this function is allowed
540 * to override the address again.
543 * @param addr binary address
544 * @param addrlen length of the address
545 * @return string representing the same address
548 udp_address_to_string (void *cls, const void *addr, size_t addrlen)
550 static char rbuf[INET6_ADDRSTRLEN + 10];
551 char buf[INET6_ADDRSTRLEN];
555 const struct IPv4UdpAddress *t4;
556 const struct IPv6UdpAddress *t6;
562 if (addrlen == sizeof (struct IPv6UdpAddress))
566 options = ntohl (t6->options);
567 port = ntohs (t6->u6_port);
568 memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
571 else if (addrlen == sizeof (struct IPv4UdpAddress))
575 options = ntohl (t4->options);
576 port = ntohs (t4->u4_port);
577 memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
580 else if (addrlen == 0)
582 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s", TRANSPORT_SESSION_INBOUND_STRING);
589 inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
591 GNUNET_snprintf (rbuf, sizeof (rbuf), (af == AF_INET6) ? "%s.%u.[%s]:%u" : "%s.%u.%s:%u",
592 PLUGIN_NAME, options, buf, port);
598 * Function called to convert a string address to
601 * @param cls closure ('struct Plugin*')
602 * @param addr string address
603 * @param addrlen length of the address
604 * @param buf location to store the buffer
605 * @param added location to store the number of bytes in the buffer.
606 * If the function returns GNUNET_SYSERR, its contents are undefined.
607 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
610 udp_string_to_address (void *cls, const char *addr, uint16_t addrlen,
611 void **buf, size_t *added)
613 struct sockaddr_storage socket_address;
619 /* Format tcp.options.address:port */
624 if ((NULL == addr) || (addrlen == 0))
627 return GNUNET_SYSERR;
629 if ('\0' != addr[addrlen - 1])
632 return GNUNET_SYSERR;
634 if (strlen (addr) != addrlen - 1)
637 return GNUNET_SYSERR;
639 plugin = GNUNET_strdup (addr);
640 optionstr = strchr (plugin, '.');
641 if (NULL == optionstr)
644 GNUNET_free (plugin);
645 return GNUNET_SYSERR;
649 options = atol (optionstr);
650 address = strchr (optionstr, '.');
654 GNUNET_free (plugin);
655 return GNUNET_SYSERR;
661 GNUNET_STRINGS_to_address_ip (address, strlen (address),
665 GNUNET_free (plugin);
666 return GNUNET_SYSERR;
669 GNUNET_free (plugin);
671 switch (socket_address.ss_family)
675 struct IPv4UdpAddress *u4;
676 struct sockaddr_in *in4 = (struct sockaddr_in *) &socket_address;
677 u4 = GNUNET_malloc (sizeof (struct IPv4UdpAddress));
678 u4->options = htonl (options);
679 u4->ipv4_addr = in4->sin_addr.s_addr;
680 u4->u4_port = in4->sin_port;
682 *added = sizeof (struct IPv4UdpAddress);
687 struct IPv6UdpAddress *u6;
688 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &socket_address;
689 u6 = GNUNET_malloc (sizeof (struct IPv6UdpAddress));
690 u6->options = htonl (options);
691 u6->ipv6_addr = in6->sin6_addr;
692 u6->u6_port = in6->sin6_port;
694 *added = sizeof (struct IPv6UdpAddress);
699 return GNUNET_SYSERR;
705 ppc_cancel_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
707 struct PrettyPrinterContext *ppc = cls;
708 /* GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PPC %p was not removed!\n", ppc); */
709 ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
710 if (NULL != ppc->resolver_handle)
712 GNUNET_RESOLVER_request_cancel (ppc->resolver_handle);
713 ppc->resolver_handle = NULL;
716 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, ppc);
722 * Append our port and forward the result.
724 * @param cls a 'struct PrettyPrinterContext'
725 * @param hostname result from DNS resolver
728 append_port (void *cls, const char *hostname)
730 struct PrettyPrinterContext *ppc = cls;
731 struct PrettyPrinterContext *cur;
733 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "PPC callback: %p `%s'\n",ppc, hostname); */
734 if (hostname == NULL)
736 ppc->asc (ppc->asc_cls, NULL);
737 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, ppc);
738 GNUNET_SCHEDULER_cancel (ppc->timeout_task);
739 ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
740 ppc->resolver_handle = NULL;
741 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "PPC %p was removed!\n", ppc); */
745 for (cur = ppc_dll_head; (NULL != cur); cur = cur->next)
752 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid callback for PPC %p \n", ppc);
756 if (GNUNET_YES == ppc->ipv6)
757 GNUNET_asprintf (&ret, "%s.%u.[%s]:%d", PLUGIN_NAME, ppc->options, hostname, ppc->port);
759 GNUNET_asprintf (&ret, "%s.%u.%s:%d", PLUGIN_NAME, ppc->options, hostname, ppc->port);
760 ppc->asc (ppc->asc_cls, ret);
765 * Convert the transports address to a nice, human-readable
769 * @param type name of the transport that generated the address
770 * @param addr one of the addresses of the host, NULL for the last address
771 * the specific address format depends on the transport
772 * @param addrlen length of the address
773 * @param numeric should (IP) addresses be displayed in numeric form?
774 * @param timeout after how long should we give up?
775 * @param asc function to call on each string
776 * @param asc_cls closure for asc
779 udp_plugin_address_pretty_printer (void *cls, const char *type,
780 const void *addr, size_t addrlen,
782 struct GNUNET_TIME_Relative timeout,
783 GNUNET_TRANSPORT_AddressStringCallback asc,
786 struct PrettyPrinterContext *ppc;
789 struct sockaddr_in a4;
790 struct sockaddr_in6 a6;
791 const struct IPv4UdpAddress *u4;
792 const struct IPv6UdpAddress *u6;
797 if (addrlen == sizeof (struct IPv6UdpAddress))
800 memset (&a6, 0, sizeof (a6));
801 a6.sin6_family = AF_INET6;
802 #if HAVE_SOCKADDR_IN_SIN_LEN
803 a6.sin6_len = sizeof (a6);
805 a6.sin6_port = u6->u6_port;
806 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof (struct in6_addr));
807 port = ntohs (u6->u6_port);
808 options = ntohl (u6->options);
812 else if (addrlen == sizeof (struct IPv4UdpAddress))
815 memset (&a4, 0, sizeof (a4));
816 a4.sin_family = AF_INET;
817 #if HAVE_SOCKADDR_IN_SIN_LEN
818 a4.sin_len = sizeof (a4);
820 a4.sin_port = u4->u4_port;
821 a4.sin_addr.s_addr = u4->ipv4_addr;
822 port = ntohs (u4->u4_port);
823 options = ntohl (u4->options);
827 else if (0 == addrlen)
829 asc (asc_cls, TRANSPORT_SESSION_INBOUND_STRING);
835 /* invalid address */
840 ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
842 ppc->asc_cls = asc_cls;
844 ppc->options = options;
845 if (addrlen == sizeof (struct IPv6UdpAddress))
846 ppc->ipv6 = GNUNET_YES;
848 ppc->ipv6 = GNUNET_NO;
849 ppc->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply(timeout, 2),
850 &ppc_cancel_task, ppc);
851 GNUNET_CONTAINER_DLL_insert (ppc_dll_head, ppc_dll_tail, ppc);
852 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "PPC %p was created!\n", ppc); */
853 ppc->resolver_handle = GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric, timeout, &append_port, ppc);
859 call_continuation (struct UDP_MessageWrapper *udpw, int result)
863 LOG (GNUNET_ERROR_TYPE_DEBUG,
864 "Calling continuation for %u byte message to `%s' with result %s\n",
865 udpw->payload_size, GNUNET_i2s (&udpw->session->target),
866 (GNUNET_OK == result) ? "OK" : "SYSERR");
868 if (udpw->msg_size >= udpw->payload_size)
869 overhead = udpw->msg_size - udpw->payload_size;
871 overhead = udpw->msg_size;
875 switch (udpw->msg_type) {
876 case MSG_UNFRAGMENTED:
877 if (NULL != udpw->cont)
879 /* Transport continuation */
880 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
881 udpw->payload_size, udpw->msg_size);
883 GNUNET_STATISTICS_update (plugin->env->stats,
884 "# UDP, unfragmented msgs, messages, sent, success",
886 GNUNET_STATISTICS_update (plugin->env->stats,
887 "# UDP, unfragmented msgs, bytes payload, sent, success",
888 udpw->payload_size, GNUNET_NO);
889 GNUNET_STATISTICS_update (plugin->env->stats,
890 "# UDP, unfragmented msgs, bytes overhead, sent, success",
891 overhead, GNUNET_NO);
892 GNUNET_STATISTICS_update (plugin->env->stats,
893 "# UDP, total, bytes overhead, sent",
894 overhead, GNUNET_NO);
895 GNUNET_STATISTICS_update (plugin->env->stats,
896 "# UDP, total, bytes payload, sent",
897 udpw->payload_size, GNUNET_NO);
899 case MSG_FRAGMENTED_COMPLETE:
900 GNUNET_assert (NULL != udpw->frag_ctx);
901 if (udpw->frag_ctx->cont != NULL)
902 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_OK,
903 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
904 GNUNET_STATISTICS_update (plugin->env->stats,
905 "# UDP, fragmented msgs, messages, sent, success",
907 GNUNET_STATISTICS_update (plugin->env->stats,
908 "# UDP, fragmented msgs, bytes payload, sent, success",
909 udpw->payload_size, GNUNET_NO);
910 GNUNET_STATISTICS_update (plugin->env->stats,
911 "# UDP, fragmented msgs, bytes overhead, sent, success",
912 overhead, GNUNET_NO);
913 GNUNET_STATISTICS_update (plugin->env->stats,
914 "# UDP, total, bytes overhead, sent",
915 overhead, GNUNET_NO);
916 GNUNET_STATISTICS_update (plugin->env->stats,
917 "# UDP, total, bytes payload, sent",
918 udpw->payload_size, GNUNET_NO);
919 GNUNET_STATISTICS_update (plugin->env->stats,
920 "# UDP, fragmented msgs, messages, pending",
924 /* Fragmented message: enqueue next fragment */
925 if (NULL != udpw->cont)
926 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
927 udpw->payload_size, udpw->msg_size);
928 GNUNET_STATISTICS_update (plugin->env->stats,
929 "# UDP, fragmented msgs, fragments, sent, success",
931 GNUNET_STATISTICS_update (plugin->env->stats,
932 "# UDP, fragmented msgs, fragments bytes, sent, success",
933 udpw->msg_size, GNUNET_NO);
936 /* No continuation */
937 GNUNET_STATISTICS_update (plugin->env->stats,
938 "# UDP, ACK msgs, messages, sent, success",
940 GNUNET_STATISTICS_update (plugin->env->stats,
941 "# UDP, ACK msgs, bytes overhead, sent, success",
942 overhead, GNUNET_NO);
943 GNUNET_STATISTICS_update (plugin->env->stats,
944 "# UDP, total, bytes overhead, sent",
945 overhead, GNUNET_NO);
951 LOG (GNUNET_ERROR_TYPE_ERROR,
952 "ERROR: %u\n", udpw->msg_type);
958 switch (udpw->msg_type) {
959 case MSG_UNFRAGMENTED:
960 /* Unfragmented message: failed to send */
961 if (NULL != udpw->cont)
962 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
963 udpw->payload_size, overhead);
964 GNUNET_STATISTICS_update (plugin->env->stats,
965 "# UDP, unfragmented msgs, messages, sent, failure",
967 GNUNET_STATISTICS_update (plugin->env->stats,
968 "# UDP, unfragmented msgs, bytes payload, sent, failure",
969 udpw->payload_size, GNUNET_NO);
970 GNUNET_STATISTICS_update (plugin->env->stats,
971 "# UDP, unfragmented msgs, bytes overhead, sent, failure",
972 overhead, GNUNET_NO);
974 case MSG_FRAGMENTED_COMPLETE:
975 GNUNET_assert (NULL != udpw->frag_ctx);
976 if (udpw->frag_ctx->cont != NULL)
977 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_SYSERR,
978 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
979 GNUNET_STATISTICS_update (plugin->env->stats,
980 "# UDP, fragmented msgs, messages, sent, failure",
982 GNUNET_STATISTICS_update (plugin->env->stats,
983 "# UDP, fragmented msgs, bytes payload, sent, failure",
984 udpw->payload_size, GNUNET_NO);
985 GNUNET_STATISTICS_update (plugin->env->stats,
986 "# UDP, fragmented msgs, bytes payload, sent, failure",
987 overhead, GNUNET_NO);
988 GNUNET_STATISTICS_update (plugin->env->stats,
989 "# UDP, fragmented msgs, bytes payload, sent, failure",
990 overhead, GNUNET_NO);
991 GNUNET_STATISTICS_update (plugin->env->stats,
992 "# UDP, fragmented msgs, messages, pending",
996 GNUNET_assert (NULL != udpw->frag_ctx);
997 /* Fragmented message: failed to send */
998 GNUNET_STATISTICS_update (plugin->env->stats,
999 "# UDP, fragmented msgs, fragments, sent, failure",
1001 GNUNET_STATISTICS_update (plugin->env->stats,
1002 "# UDP, fragmented msgs, fragments bytes, sent, failure",
1003 udpw->msg_size, GNUNET_NO);
1006 /* ACK message: failed to send */
1007 GNUNET_STATISTICS_update (plugin->env->stats,
1008 "# UDP, ACK msgs, messages, sent, failure",
1012 /* Beacon message: failed to send */
1028 * Check if the given port is plausible (must be either our listen
1029 * port or our advertised port). If it is neither, we return
1032 * @param plugin global variables
1033 * @param in_port port number to check
1034 * @return GNUNET_OK if port is either open_port or adv_port
1037 check_port (struct Plugin *plugin, uint16_t in_port)
1039 if ((in_port == plugin->port) || (in_port == plugin->aport))
1041 return GNUNET_SYSERR;
1046 * Function that will be called to check if a binary address for this
1047 * plugin is well-formed and corresponds to an address for THIS peer
1048 * (as per our configuration). Naturally, if absolutely necessary,
1049 * plugins can be a bit conservative in their answer, but in general
1050 * plugins should make sure that the address does not redirect
1051 * traffic to a 3rd party that might try to man-in-the-middle our
1054 * @param cls closure, should be our handle to the Plugin
1055 * @param addr pointer to the address
1056 * @param addrlen length of addr
1057 * @return GNUNET_OK if this is a plausible address for this peer
1058 * and transport, GNUNET_SYSERR if not
1062 udp_plugin_check_address (void *cls, const void *addr, size_t addrlen)
1064 struct Plugin *plugin = cls;
1065 struct IPv4UdpAddress *v4;
1066 struct IPv6UdpAddress *v6;
1068 if ((addrlen != sizeof (struct IPv4UdpAddress)) &&
1069 (addrlen != sizeof (struct IPv6UdpAddress)))
1071 return GNUNET_SYSERR;
1073 if (addrlen == sizeof (struct IPv4UdpAddress))
1075 v4 = (struct IPv4UdpAddress *) addr;
1076 if (GNUNET_OK != check_port (plugin, ntohs (v4->u4_port)))
1077 return GNUNET_SYSERR;
1079 GNUNET_NAT_test_address (plugin->nat, &v4->ipv4_addr,
1080 sizeof (struct in_addr)))
1081 return GNUNET_SYSERR;
1085 v6 = (struct IPv6UdpAddress *) addr;
1086 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1088 GNUNET_break_op (0);
1089 return GNUNET_SYSERR;
1091 if (GNUNET_OK != check_port (plugin, ntohs (v6->u6_port)))
1092 return GNUNET_SYSERR;
1094 GNUNET_NAT_test_address (plugin->nat, &v6->ipv6_addr,
1095 sizeof (struct in6_addr)))
1096 return GNUNET_SYSERR;
1103 * Task to free resources associated with a session.
1105 * @param s session to free
1108 free_session (struct Session *s)
1110 if (NULL != s->frag_ctx)
1112 GNUNET_FRAGMENT_context_destroy(s->frag_ctx->frag, NULL, NULL);
1113 GNUNET_free (s->frag_ctx);
1121 dequeue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1123 if (plugin->bytes_in_buffer < udpw->msg_size)
1127 GNUNET_STATISTICS_update (plugin->env->stats,
1128 "# UDP, total, bytes in buffers",
1129 - (long long) udpw->msg_size, GNUNET_NO);
1130 plugin->bytes_in_buffer -= udpw->msg_size;
1132 GNUNET_STATISTICS_update (plugin->env->stats,
1133 "# UDP, total, msgs in buffers",
1135 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1136 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_queue_head,
1137 plugin->ipv4_queue_tail, udpw);
1138 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1139 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_queue_head,
1140 plugin->ipv6_queue_tail, udpw);
1144 fragmented_message_done (struct UDP_FragmentationContext *fc, int result)
1146 struct UDP_MessageWrapper *udpw;
1147 struct UDP_MessageWrapper *tmp;
1148 struct UDP_MessageWrapper dummy;
1149 struct Session *s = fc->session;
1151 LOG (GNUNET_ERROR_TYPE_DEBUG, "%p : Fragmented message removed with result %s\n", fc, (result == GNUNET_SYSERR) ? "FAIL" : "SUCCESS");
1153 /* Call continuation for fragmented message */
1154 memset (&dummy, 0, sizeof (dummy));
1155 dummy.msg_type = MSG_FRAGMENTED_COMPLETE;
1156 dummy.msg_size = s->frag_ctx->on_wire_size;
1157 dummy.payload_size = s->frag_ctx->payload_size;
1158 dummy.frag_ctx = s->frag_ctx;
1160 dummy.cont_cls = NULL;
1163 call_continuation (&dummy, result);
1165 /* Remove leftover fragments from queue */
1166 if (s->addrlen == sizeof (struct sockaddr_in6))
1168 udpw = plugin->ipv6_queue_head;
1169 while (NULL != udpw)
1172 if ((udpw->frag_ctx != NULL) && (udpw->frag_ctx == s->frag_ctx))
1174 dequeue (plugin, udpw);
1175 call_continuation (udpw, GNUNET_SYSERR);
1181 if (s->addrlen == sizeof (struct sockaddr_in))
1183 udpw = plugin->ipv4_queue_head;
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,
1199 &s->last_expected_msg_delay,
1200 &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 s session to close down
1213 disconnect_session (struct Session *s)
1215 struct UDP_MessageWrapper *udpw;
1216 struct UDP_MessageWrapper *next;
1218 GNUNET_assert (GNUNET_YES != s->in_destroy);
1219 LOG (GNUNET_ERROR_TYPE_DEBUG,
1220 "Session %p to peer `%s' address ended \n",
1222 GNUNET_i2s (&s->target),
1223 GNUNET_a2s (s->sock_addr, s->addrlen));
1224 stop_session_timeout (s);
1226 if (NULL != s->frag_ctx)
1228 /* Remove fragmented message due to disconnect */
1229 fragmented_message_done (s->frag_ctx, GNUNET_SYSERR);
1232 next = plugin->ipv4_queue_head;
1233 while (NULL != (udpw = next))
1236 if (udpw->session == s)
1238 dequeue (plugin, udpw);
1239 call_continuation(udpw, GNUNET_SYSERR);
1243 next = plugin->ipv6_queue_head;
1244 while (NULL != (udpw = next))
1247 if (udpw->session == s)
1249 dequeue (plugin, udpw);
1250 call_continuation(udpw, GNUNET_SYSERR);
1255 plugin->env->session_end (plugin->env->cls, &s->target, s);
1257 if (NULL != s->frag_ctx)
1259 if (NULL != s->frag_ctx->cont)
1261 s->frag_ctx->cont (s->frag_ctx->cont_cls, &s->target, GNUNET_SYSERR,
1262 s->frag_ctx->payload_size, s->frag_ctx->on_wire_size);
1263 LOG (GNUNET_ERROR_TYPE_DEBUG,
1264 "Calling continuation for fragemented message to `%s' with result SYSERR\n",
1265 GNUNET_i2s (&s->target));
1269 GNUNET_assert (GNUNET_YES ==
1270 GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
1271 &s->target.hashPubKey,
1273 GNUNET_STATISTICS_set(plugin->env->stats,
1274 "# UDP, sessions active",
1275 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1278 s->in_destroy = GNUNET_YES;
1284 * Destroy a session, plugin is being unloaded.
1287 * @param key hash of public key of target peer
1288 * @param value a 'struct PeerSession*' to clean up
1289 * @return GNUNET_OK (continue to iterate)
1292 disconnect_and_free_it (void *cls, const struct GNUNET_HashCode * key, void *value)
1294 disconnect_session(value);
1300 * Disconnect from a remote node. Clean up session if we have one for this peer
1302 * @param cls closure for this call (should be handle to Plugin)
1303 * @param target the peeridentity of the peer to disconnect
1304 * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
1307 udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
1309 struct Plugin *plugin = cls;
1310 GNUNET_assert (plugin != NULL);
1312 GNUNET_assert (target != NULL);
1313 LOG (GNUNET_ERROR_TYPE_DEBUG,
1314 "Disconnecting from peer `%s'\n", GNUNET_i2s (target));
1315 /* Clean up sessions */
1316 GNUNET_CONTAINER_multihashmap_get_multiple (plugin->sessions, &target->hashPubKey, &disconnect_and_free_it, plugin);
1321 * Session was idle, so disconnect it
1324 session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1326 GNUNET_assert (NULL != cls);
1327 struct Session *s = cls;
1329 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1330 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1331 "Session %p was idle for %llu ms, disconnecting\n",
1332 s, (unsigned long long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
1333 /* call session destroy function */
1334 disconnect_session (s);
1339 * Start session timeout
1342 start_session_timeout (struct Session *s)
1344 GNUNET_assert (NULL != s);
1345 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s->timeout_task);
1346 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1349 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1350 "Timeout for session %p set to %llu ms\n",
1351 s, (unsigned long long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
1356 * Increment session timeout due to activity
1359 reschedule_session_timeout (struct Session *s)
1361 GNUNET_assert (NULL != s);
1362 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
1364 GNUNET_SCHEDULER_cancel (s->timeout_task);
1365 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1368 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1369 "Timeout rescheduled for session %p set to %llu ms\n",
1370 s, (unsigned long long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
1378 stop_session_timeout (struct Session *s)
1380 GNUNET_assert (NULL != s);
1382 if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
1384 GNUNET_SCHEDULER_cancel (s->timeout_task);
1385 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1386 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1387 "Timeout stopped for session %p canceled\n",
1388 s, (unsigned long long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
1393 static struct Session *
1394 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
1395 const void *addr, size_t addrlen,
1396 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1399 const struct IPv4UdpAddress *t4;
1400 const struct IPv6UdpAddress *t6;
1401 struct sockaddr_in *v4;
1402 struct sockaddr_in6 *v6;
1407 case sizeof (struct IPv4UdpAddress):
1408 if (NULL == plugin->sockv4)
1410 LOG (GNUNET_ERROR_TYPE_DEBUG,
1411 "Could not create session for peer `%s' address `%s': IPv4 is not enabled\n",
1413 udp_address_to_string(NULL, addr, addrlen));
1417 s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in));
1418 len = sizeof (struct sockaddr_in);
1419 v4 = (struct sockaddr_in *) &s[1];
1420 v4->sin_family = AF_INET;
1421 #if HAVE_SOCKADDR_IN_SIN_LEN
1422 v4->sin_len = sizeof (struct sockaddr_in);
1424 v4->sin_port = t4->u4_port;
1425 v4->sin_addr.s_addr = t4->ipv4_addr;
1426 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v4, sizeof (struct sockaddr_in));
1428 case sizeof (struct IPv6UdpAddress):
1429 if (NULL == plugin->sockv6)
1431 LOG (GNUNET_ERROR_TYPE_INFO,
1432 "Could not create session for peer `%s' address `%s': IPv6 is not enabled\n",
1434 udp_address_to_string(NULL, addr, addrlen));
1439 GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in6));
1440 len = sizeof (struct sockaddr_in6);
1441 v6 = (struct sockaddr_in6 *) &s[1];
1442 v6->sin6_family = AF_INET6;
1443 #if HAVE_SOCKADDR_IN_SIN_LEN
1444 v6->sin6_len = sizeof (struct sockaddr_in6);
1446 v6->sin6_port = t6->u6_port;
1447 v6->sin6_addr = t6->ipv6_addr;
1448 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v6, sizeof (struct sockaddr_in6));
1451 /* Must have a valid address to send to */
1452 GNUNET_STATISTICS_update (plugin->env->stats,
1454 ("# requests to create session with invalid address"),
1459 s->target = *target;
1460 s->sock_addr = (const struct sockaddr *) &s[1];
1461 s->last_expected_ack_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 250);
1462 s->last_expected_msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
1463 s->flow_delay_from_other_peer = GNUNET_TIME_UNIT_ZERO_ABS;
1464 s->flow_delay_for_other_peer = GNUNET_TIME_UNIT_ZERO;
1465 s->inbound = GNUNET_NO;
1466 start_session_timeout (s);
1472 session_cmp_it (void *cls,
1473 const struct GNUNET_HashCode * key,
1476 struct SessionCompareContext * cctx = cls;
1477 const struct GNUNET_HELLO_Address *address = cctx->addr;
1478 struct Session *s = value;
1480 socklen_t s_addrlen = s->addrlen;
1482 LOG (GNUNET_ERROR_TYPE_DEBUG, "Comparing address %s <-> %s\n",
1483 udp_address_to_string (NULL, (void *) address->address, address->address_length),
1484 GNUNET_a2s (s->sock_addr, s->addrlen));
1485 if ((address->address_length == sizeof (struct IPv4UdpAddress)) &&
1486 (s_addrlen == sizeof (struct sockaddr_in)))
1488 struct IPv4UdpAddress * u4 = NULL;
1489 u4 = (struct IPv4UdpAddress *) address->address;
1490 const struct sockaddr_in *s4 = (const struct sockaddr_in *) s->sock_addr;
1491 if ((0 == memcmp ((const void *) &u4->ipv4_addr,(const void *) &s4->sin_addr, sizeof (struct in_addr))) &&
1492 (u4->u4_port == s4->sin_port))
1499 if ((address->address_length == sizeof (struct IPv6UdpAddress)) &&
1500 (s_addrlen == sizeof (struct sockaddr_in6)))
1502 struct IPv6UdpAddress * u6 = NULL;
1503 u6 = (struct IPv6UdpAddress *) address->address;
1504 const struct sockaddr_in6 *s6 = (const struct sockaddr_in6 *) s->sock_addr;
1505 if ((0 == memcmp (&u6->ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr))) &&
1506 (u6->u6_port == s6->sin6_port))
1517 * Function obtain the network type for a session
1519 * @param cls closure ('struct Plugin*')
1520 * @param session the session
1521 * @return the network type in HBO or GNUNET_SYSERR
1523 static enum GNUNET_ATS_Network_Type
1524 udp_get_network (void *cls,
1525 struct Session *session)
1527 return ntohl (session->ats.value);
1532 * Creates a new outbound session the transport service will use to send data to the
1535 * @param cls the plugin
1536 * @param address the address
1537 * @return the session or NULL of max connections exceeded
1539 static struct Session *
1540 udp_plugin_lookup_session (void *cls,
1541 const struct GNUNET_HELLO_Address *address)
1543 struct Plugin * plugin = cls;
1544 struct IPv6UdpAddress * udp_a6;
1545 struct IPv4UdpAddress * udp_a4;
1547 GNUNET_assert (plugin != NULL);
1548 GNUNET_assert (address != NULL);
1551 if ((address->address == NULL) ||
1552 ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1553 (address->address_length != sizeof (struct IPv6UdpAddress))))
1555 LOG (GNUNET_ERROR_TYPE_WARNING,
1556 _("Trying to create session for address of unexpected length %u (should be %u or %u)\n"),
1557 address->address_length,
1558 sizeof (struct IPv4UdpAddress),
1559 sizeof (struct IPv6UdpAddress));
1563 if (address->address_length == sizeof (struct IPv4UdpAddress))
1565 if (plugin->sockv4 == NULL)
1567 udp_a4 = (struct IPv4UdpAddress *) address->address;
1568 if (udp_a4->u4_port == 0)
1572 if (address->address_length == sizeof (struct IPv6UdpAddress))
1574 if (plugin->sockv6 == NULL)
1576 udp_a6 = (struct IPv6UdpAddress *) address->address;
1577 if (udp_a6->u6_port == 0)
1581 /* check if session already exists */
1582 struct SessionCompareContext cctx;
1583 cctx.addr = address;
1585 LOG (GNUNET_ERROR_TYPE_DEBUG,
1586 "Looking for existing session for peer `%s' `%s' \n",
1587 GNUNET_i2s (&address->peer),
1588 udp_address_to_string(NULL, address->address, address->address_length));
1589 GNUNET_CONTAINER_multihashmap_get_multiple(plugin->sessions, &address->peer.hashPubKey, session_cmp_it, &cctx);
1590 if (cctx.res != NULL)
1592 LOG (GNUNET_ERROR_TYPE_DEBUG, "Found existing session %p\n", cctx.res);
1598 static struct Session *
1599 udp_plugin_create_session (void *cls,
1600 const struct GNUNET_HELLO_Address *address)
1602 struct Session * s = NULL;
1604 /* otherwise create new */
1605 s = create_session (plugin,
1608 address->address_length,
1611 return NULL; /* protocol not supported or address invalid */
1612 LOG (GNUNET_ERROR_TYPE_DEBUG,
1613 "Creating new session %p for peer `%s' address `%s'\n",
1615 GNUNET_i2s(&address->peer),
1616 udp_address_to_string(NULL,address->address,address->address_length));
1617 GNUNET_assert (GNUNET_OK ==
1618 GNUNET_CONTAINER_multihashmap_put (plugin->sessions,
1619 &s->target.hashPubKey,
1621 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1622 GNUNET_STATISTICS_set(plugin->env->stats,
1623 "# UDP, sessions active",
1624 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1632 * Creates a new outbound session the transport service will use to send data to the
1635 * @param cls the plugin
1636 * @param address the address
1637 * @return the session or NULL of max connections exceeded
1639 static struct Session *
1640 udp_plugin_get_session (void *cls,
1641 const struct GNUNET_HELLO_Address *address)
1643 struct Session * s = NULL;
1645 if (NULL == address)
1650 if ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1651 (address->address_length != sizeof (struct IPv6UdpAddress)))
1654 /* otherwise create new */
1655 if (NULL != (s = udp_plugin_lookup_session(cls, address)))
1658 return udp_plugin_create_session (cls, address);
1663 enqueue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1665 if (plugin->bytes_in_buffer + udpw->msg_size > INT64_MAX)
1669 GNUNET_STATISTICS_update (plugin->env->stats,
1670 "# UDP, total, bytes in buffers",
1671 udpw->msg_size, GNUNET_NO);
1672 plugin->bytes_in_buffer += udpw->msg_size;
1674 GNUNET_STATISTICS_update (plugin->env->stats,
1675 "# UDP, total, msgs in buffers",
1677 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1678 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_queue_head,
1679 plugin->ipv4_queue_tail, udpw);
1680 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1681 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_queue_head,
1682 plugin->ipv6_queue_tail, udpw);
1688 * Fragment message was transmitted via UDP, let fragmentation know
1689 * to send the next fragment now.
1691 * @param cls the 'struct UDPMessageWrapper' of the fragment
1692 * @param target destination peer (ignored)
1693 * @param result GNUNET_OK on success (ignored)
1694 * @param payload bytes payload sent
1695 * @param physical bytes physical sent
1698 send_next_fragment (void *cls,
1699 const struct GNUNET_PeerIdentity *target,
1700 int result, size_t payload, size_t physical)
1702 struct UDP_MessageWrapper *udpw = cls;
1703 GNUNET_FRAGMENT_context_transmission_done (udpw->frag_ctx->frag);
1708 * Function that is called with messages created by the fragmentation
1709 * module. In the case of the 'proc' callback of the
1710 * GNUNET_FRAGMENT_context_create function, this function must
1711 * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
1713 * @param cls closure, the 'struct FragmentationContext'
1714 * @param msg the message that was created
1717 enqueue_fragment (void *cls, const struct GNUNET_MessageHeader *msg)
1719 struct UDP_FragmentationContext *frag_ctx = cls;
1720 struct Plugin *plugin = frag_ctx->plugin;
1721 struct UDP_MessageWrapper * udpw;
1722 size_t msg_len = ntohs (msg->size);
1724 LOG (GNUNET_ERROR_TYPE_DEBUG,
1725 "Enqueuing fragment with %u bytes\n", msg_len);
1726 frag_ctx->fragments_used ++;
1727 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msg_len);
1728 udpw->session = frag_ctx->session;
1729 udpw->msg_buf = (char *) &udpw[1];
1730 udpw->msg_size = msg_len;
1731 udpw->payload_size = msg_len; /*FIXME: minus fragment overhead */
1732 udpw->cont = &send_next_fragment;
1733 udpw->cont_cls = udpw;
1734 udpw->timeout = frag_ctx->timeout;
1735 udpw->frag_ctx = frag_ctx;
1736 udpw->msg_type = MSG_FRAGMENTED;
1737 memcpy (udpw->msg_buf, msg, msg_len);
1738 enqueue (plugin, udpw);
1739 schedule_select (plugin);
1744 * Function that can be used by the transport service to transmit
1745 * a message using the plugin. Note that in the case of a
1746 * peer disconnecting, the continuation MUST be called
1747 * prior to the disconnect notification itself. This function
1748 * will be called with this peer's HELLO message to initiate
1749 * a fresh connection to another peer.
1751 * @param cls closure
1752 * @param s which session must be used
1753 * @param msgbuf the message to transmit
1754 * @param msgbuf_size number of bytes in 'msgbuf'
1755 * @param priority how important is the message (most plugins will
1756 * ignore message priority and just FIFO)
1757 * @param to how long to wait at most for the transmission (does not
1758 * require plugins to discard the message after the timeout,
1759 * just advisory for the desired delay; most plugins will ignore
1761 * @param cont continuation to call once the message has
1762 * been transmitted (or if the transport is ready
1763 * for the next transmission call; or if the
1764 * peer disconnected...); can be NULL
1765 * @param cont_cls closure for cont
1766 * @return number of bytes used (on the physical network, with overheads);
1767 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1768 * and does NOT mean that the message was not transmitted (DV)
1771 udp_plugin_send (void *cls,
1773 const char *msgbuf, size_t msgbuf_size,
1774 unsigned int priority,
1775 struct GNUNET_TIME_Relative to,
1776 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1778 struct Plugin *plugin = cls;
1779 size_t udpmlen = msgbuf_size + sizeof (struct UDPMessage);
1780 struct UDP_FragmentationContext * frag_ctx;
1781 struct UDP_MessageWrapper * udpw;
1782 struct UDPMessage *udp;
1784 GNUNET_assert (plugin != NULL);
1785 GNUNET_assert (s != NULL);
1787 if ((s->addrlen == sizeof (struct sockaddr_in6)) && (plugin->sockv6 == NULL))
1788 return GNUNET_SYSERR;
1789 if ((s->addrlen == sizeof (struct sockaddr_in)) && (plugin->sockv4 == NULL))
1790 return GNUNET_SYSERR;
1791 if (udpmlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1794 return GNUNET_SYSERR;
1796 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains_value(plugin->sessions, &s->target.hashPubKey, s))
1799 return GNUNET_SYSERR;
1801 LOG (GNUNET_ERROR_TYPE_DEBUG,
1802 "UDP transmits %u-byte message to `%s' using address `%s'\n",
1804 GNUNET_i2s (&s->target),
1805 GNUNET_a2s(s->sock_addr, s->addrlen));
1809 udp = (struct UDPMessage *) mbuf;
1810 udp->header.size = htons (udpmlen);
1811 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
1812 udp->reserved = htonl (0);
1813 udp->sender = *plugin->env->my_identity;
1815 reschedule_session_timeout(s);
1816 if (udpmlen <= UDP_MTU)
1818 /* unfragmented message */
1819 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + udpmlen);
1821 udpw->msg_buf = (char *) &udpw[1];
1822 udpw->msg_size = udpmlen; /* message size with UDP overhead */
1823 udpw->payload_size = msgbuf_size; /* message size without UDP overhead */
1824 udpw->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1826 udpw->cont_cls = cont_cls;
1827 udpw->frag_ctx = NULL;
1828 udpw->msg_type = MSG_UNFRAGMENTED;
1829 memcpy (udpw->msg_buf, udp, sizeof (struct UDPMessage));
1830 memcpy (&udpw->msg_buf[sizeof (struct UDPMessage)], msgbuf, msgbuf_size);
1831 enqueue (plugin, udpw);
1833 GNUNET_STATISTICS_update (plugin->env->stats,
1834 "# UDP, unfragmented msgs, messages, attempt",
1836 GNUNET_STATISTICS_update (plugin->env->stats,
1837 "# UDP, unfragmented msgs, bytes payload, attempt",
1838 udpw->payload_size, GNUNET_NO);
1842 /* fragmented message */
1843 if (s->frag_ctx != NULL)
1844 return GNUNET_SYSERR;
1845 memcpy (&udp[1], msgbuf, msgbuf_size);
1846 frag_ctx = GNUNET_malloc (sizeof (struct UDP_FragmentationContext));
1847 frag_ctx->plugin = plugin;
1848 frag_ctx->session = s;
1849 frag_ctx->cont = cont;
1850 frag_ctx->cont_cls = cont_cls;
1851 frag_ctx->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1852 frag_ctx->payload_size = msgbuf_size; /* unfragmented message size without UDP overhead */
1853 frag_ctx->on_wire_size = 0; /* bytes with UDP and fragmentation overhead */
1854 frag_ctx->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
1857 s->last_expected_msg_delay,
1858 s->last_expected_ack_delay,
1862 s->frag_ctx = frag_ctx;
1863 GNUNET_STATISTICS_update (plugin->env->stats,
1864 "# UDP, fragmented msgs, messages, pending",
1866 GNUNET_STATISTICS_update (plugin->env->stats,
1867 "# UDP, fragmented msgs, messages, attempt",
1869 GNUNET_STATISTICS_update (plugin->env->stats,
1870 "# UDP, fragmented msgs, bytes payload, attempt",
1871 frag_ctx->payload_size, GNUNET_NO);
1873 schedule_select (plugin);
1879 * Our external IP address/port mapping has changed.
1881 * @param cls closure, the 'struct LocalAddrList'
1882 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1883 * the previous (now invalid) one
1884 * @param addr either the previous or the new public IP address
1885 * @param addrlen actual lenght of the address
1888 udp_nat_port_map_callback (void *cls, int add_remove,
1889 const struct sockaddr *addr, socklen_t addrlen)
1891 struct Plugin *plugin = cls;
1892 struct IPv4UdpAddress u4;
1893 struct IPv6UdpAddress u6;
1897 LOG (GNUNET_ERROR_TYPE_INFO,
1898 "NAT notification to %s address `%s'\n",
1899 (GNUNET_YES == add_remove) ? "add" : "remove",
1900 GNUNET_a2s (addr, addrlen));
1902 /* convert 'addr' to our internal format */
1903 switch (addr->sa_family)
1906 GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
1907 memset (&u4, 0, sizeof (u4));
1908 u4.options = htonl(myoptions);
1909 u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1910 u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
1911 if (0 == ((struct sockaddr_in *) addr)->sin_port)
1914 args = sizeof (struct IPv4UdpAddress);
1917 GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
1918 memset (&u4, 0, sizeof (u4));
1919 u6.options = htonl(myoptions);
1920 if (0 == ((struct sockaddr_in6 *) addr)->sin6_port)
1922 memcpy (&u6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
1923 sizeof (struct in6_addr));
1924 u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
1926 args = sizeof (struct IPv6UdpAddress);
1932 /* modify our published address list */
1933 plugin->env->notify_address (plugin->env->cls, add_remove, arg, args, "udp");
1939 * Message tokenizer has broken up an incomming message. Pass it on
1942 * @param cls the 'struct Plugin'
1943 * @param client the 'struct SourceInformation'
1944 * @param hdr the actual message
1947 process_inbound_tokenized_messages (void *cls, void *client,
1948 const struct GNUNET_MessageHeader *hdr)
1950 struct Plugin *plugin = cls;
1951 struct SourceInformation *si = client;
1952 struct GNUNET_TIME_Relative delay;
1954 GNUNET_assert (si->session != NULL);
1955 if (GNUNET_YES == si->session->in_destroy)
1958 GNUNET_break (ntohl(si->session->ats.value) != GNUNET_ATS_NET_UNSPECIFIED);
1959 delay = plugin->env->receive (plugin->env->cls,
1963 (GNUNET_YES == si->session->inbound) ? NULL : si->arg,
1964 (GNUNET_YES == si->session->inbound) ? 0 : si->args);
1966 plugin->env->update_address_metrics (plugin->env->cls,
1968 (GNUNET_YES == si->session->inbound) ? NULL : si->arg,
1969 (GNUNET_YES == si->session->inbound) ? 0 : si->args,
1971 &si->session->ats, 1);
1973 si->session->flow_delay_for_other_peer = delay;
1974 reschedule_session_timeout(si->session);
1980 * We've received a UDP Message. Process it (pass contents to main service).
1982 * @param plugin plugin context
1983 * @param msg the message
1984 * @param sender_addr sender address
1985 * @param sender_addr_len number of bytes in sender_addr
1988 process_udp_message (struct Plugin *plugin, const struct UDPMessage *msg,
1989 const struct sockaddr *sender_addr,
1990 socklen_t sender_addr_len)
1992 struct SourceInformation si;
1994 struct IPv4UdpAddress u4;
1995 struct IPv6UdpAddress u6;
1999 if (0 != ntohl (msg->reserved))
2001 GNUNET_break_op (0);
2004 if (ntohs (msg->header.size) <
2005 sizeof (struct GNUNET_MessageHeader) + sizeof (struct UDPMessage))
2007 GNUNET_break_op (0);
2011 /* convert address */
2012 switch (sender_addr->sa_family)
2015 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in));
2016 memset (&u4, 0, sizeof (u4));
2017 u6.options = htonl (0);
2018 u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
2019 u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
2024 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in6));
2025 memset (&u6, 0, sizeof (u6));
2026 u6.options = htonl (0);
2027 u6.ipv6_addr = ((struct sockaddr_in6 *) sender_addr)->sin6_addr;
2028 u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
2036 LOG (GNUNET_ERROR_TYPE_DEBUG,
2037 "Received message with %u bytes from peer `%s' at `%s'\n",
2038 (unsigned int) ntohs (msg->header.size), GNUNET_i2s (&msg->sender),
2039 GNUNET_a2s (sender_addr, sender_addr_len));
2041 struct GNUNET_HELLO_Address * address = GNUNET_HELLO_address_allocate(&msg->sender, "udp", arg, args);
2042 if (NULL == (s = udp_plugin_lookup_session (plugin, address)))
2044 s = udp_plugin_create_session(plugin, address);
2045 s->inbound = GNUNET_YES;
2046 plugin->env->session_start (NULL, &address->peer, PLUGIN_NAME,
2047 (GNUNET_YES == s->inbound) ? NULL : address->address,
2048 (GNUNET_YES == s->inbound) ? 0 : address->address_length,
2051 GNUNET_free (address);
2053 /* iterate over all embedded messages */
2055 si.sender = msg->sender;
2059 GNUNET_SERVER_mst_receive (plugin->mst, &si, (const char *) &msg[1],
2060 ntohs (msg->header.size) -
2061 sizeof (struct UDPMessage), GNUNET_YES, GNUNET_NO);
2063 if ( (0 == s->rc) && (GNUNET_YES == s->in_destroy))
2069 * Scan the heap for a receive context with the given address.
2071 * @param cls the 'struct FindReceiveContext'
2072 * @param node internal node of the heap
2073 * @param element value stored at the node (a 'struct ReceiveContext')
2074 * @param cost cost associated with the node
2075 * @return GNUNET_YES if we should continue to iterate,
2079 find_receive_context (void *cls, struct GNUNET_CONTAINER_HeapNode *node,
2080 void *element, GNUNET_CONTAINER_HeapCostType cost)
2082 struct FindReceiveContext *frc = cls;
2083 struct DefragContext *e = element;
2085 if ((frc->addr_len == e->addr_len) &&
2086 (0 == memcmp (frc->addr, e->src_addr, frc->addr_len)))
2096 * Process a defragmented message.
2098 * @param cls the 'struct ReceiveContext'
2099 * @param msg the message
2102 fragment_msg_proc (void *cls, const struct GNUNET_MessageHeader *msg)
2104 struct DefragContext *rc = cls;
2106 if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
2111 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2116 process_udp_message (rc->plugin, (const struct UDPMessage *) msg,
2117 rc->src_addr, rc->addr_len);
2121 struct LookupContext
2123 const struct sockaddr * addr;
2125 struct Session *res;
2132 lookup_session_by_addr_it (void *cls, const struct GNUNET_HashCode * key, void *value)
2134 struct LookupContext *l_ctx = cls;
2135 struct Session * s = value;
2137 if ((s->addrlen == l_ctx->addrlen) &&
2138 (0 == memcmp (s->sock_addr, l_ctx->addr, s->addrlen)))
2148 * Transmit an acknowledgement.
2150 * @param cls the 'struct ReceiveContext'
2151 * @param id message ID (unused)
2152 * @param msg ack to transmit
2155 ack_proc (void *cls, uint32_t id, const struct GNUNET_MessageHeader *msg)
2157 struct DefragContext *rc = cls;
2158 size_t msize = sizeof (struct UDP_ACK_Message) + ntohs (msg->size);
2159 struct UDP_ACK_Message *udp_ack;
2161 struct UDP_MessageWrapper *udpw;
2163 struct LookupContext l_ctx;
2165 l_ctx.addr = rc->src_addr;
2166 l_ctx.addrlen = rc->addr_len;
2168 GNUNET_CONTAINER_multihashmap_iterate (rc->plugin->sessions,
2169 &lookup_session_by_addr_it,
2176 if (s->flow_delay_for_other_peer.rel_value <= UINT32_MAX)
2177 delay = s->flow_delay_for_other_peer.rel_value;
2179 LOG (GNUNET_ERROR_TYPE_DEBUG,
2180 "Sending ACK to `%s' including delay of %u ms\n",
2181 GNUNET_a2s (rc->src_addr,
2182 (rc->src_addr->sa_family ==
2183 AF_INET) ? sizeof (struct sockaddr_in) : sizeof (struct
2186 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msize);
2187 udpw->msg_size = msize;
2188 udpw->payload_size = 0;
2190 udpw->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
2191 udpw->msg_buf = (char *)&udpw[1];
2192 udpw->msg_type = MSG_ACK;
2193 udp_ack = (struct UDP_ACK_Message *) udpw->msg_buf;
2194 udp_ack->header.size = htons ((uint16_t) msize);
2195 udp_ack->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
2196 udp_ack->delay = htonl (delay);
2197 udp_ack->sender = *rc->plugin->env->my_identity;
2198 memcpy (&udp_ack[1], msg, ntohs (msg->size));
2199 enqueue (rc->plugin, udpw);
2204 read_process_msg (struct Plugin *plugin,
2205 const struct GNUNET_MessageHeader *msg,
2209 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2211 GNUNET_break_op (0);
2214 process_udp_message (plugin, (const struct UDPMessage *) msg,
2215 (const struct sockaddr *) addr, fromlen);
2220 read_process_ack (struct Plugin *plugin,
2221 const struct GNUNET_MessageHeader *msg,
2225 const struct GNUNET_MessageHeader *ack;
2226 const struct UDP_ACK_Message *udp_ack;
2227 struct LookupContext l_ctx;
2229 struct GNUNET_TIME_Relative flow_delay;
2231 if (ntohs (msg->size) <
2232 sizeof (struct UDP_ACK_Message) + sizeof (struct GNUNET_MessageHeader))
2234 GNUNET_break_op (0);
2237 udp_ack = (const struct UDP_ACK_Message *) msg;
2238 l_ctx.addr = (const struct sockaddr *) addr;
2239 l_ctx.addrlen = fromlen;
2241 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions,
2242 &lookup_session_by_addr_it,
2246 if ((NULL == s) || (NULL == s->frag_ctx))
2251 flow_delay.rel_value = (uint64_t) ntohl (udp_ack->delay);
2252 LOG (GNUNET_ERROR_TYPE_DEBUG,
2253 "We received a sending delay of %llu\n",
2254 flow_delay.rel_value);
2255 s->flow_delay_from_other_peer =
2256 GNUNET_TIME_relative_to_absolute (flow_delay);
2258 ack = (const struct GNUNET_MessageHeader *) &udp_ack[1];
2259 if (ntohs (ack->size) !=
2260 ntohs (msg->size) - sizeof (struct UDP_ACK_Message))
2262 GNUNET_break_op (0);
2266 if (0 != memcmp (&l_ctx.res->target, &udp_ack->sender, sizeof (struct GNUNET_PeerIdentity)))
2268 if (GNUNET_OK != GNUNET_FRAGMENT_process_ack (s->frag_ctx->frag, ack))
2270 LOG (GNUNET_ERROR_TYPE_DEBUG,
2271 "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
2272 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2273 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2274 /* Expect more ACKs to arrive */
2278 LOG (GNUNET_ERROR_TYPE_DEBUG,
2279 "Message full ACK'ed\n",
2280 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2281 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2283 /* Remove fragmented message after successful sending */
2284 fragmented_message_done (s->frag_ctx, GNUNET_OK);
2289 read_process_fragment (struct Plugin *plugin,
2290 const struct GNUNET_MessageHeader *msg,
2294 struct DefragContext *d_ctx;
2295 struct GNUNET_TIME_Absolute now;
2296 struct FindReceiveContext frc;
2299 frc.addr = (const struct sockaddr *) addr;
2300 frc.addr_len = fromlen;
2302 LOG (GNUNET_ERROR_TYPE_DEBUG, "UDP processes %u-byte fragment from `%s'\n",
2303 (unsigned int) ntohs (msg->size),
2304 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2305 /* Lookup existing receive context for this address */
2306 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
2307 &find_receive_context,
2309 now = GNUNET_TIME_absolute_get ();
2314 /* Create a new defragmentation context */
2315 d_ctx = GNUNET_malloc (sizeof (struct DefragContext) + fromlen);
2316 memcpy (&d_ctx[1], addr, fromlen);
2317 d_ctx->src_addr = (const struct sockaddr *) &d_ctx[1];
2318 d_ctx->addr_len = fromlen;
2319 d_ctx->plugin = plugin;
2321 GNUNET_DEFRAGMENT_context_create (plugin->env->stats, UDP_MTU,
2322 UDP_MAX_MESSAGES_IN_DEFRAG, d_ctx,
2323 &fragment_msg_proc, &ack_proc);
2325 GNUNET_CONTAINER_heap_insert (plugin->defrag_ctxs, d_ctx,
2326 (GNUNET_CONTAINER_HeapCostType)
2328 LOG (GNUNET_ERROR_TYPE_DEBUG,
2329 "Created new defragmentation context for %u-byte fragment from `%s'\n",
2330 (unsigned int) ntohs (msg->size),
2331 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2335 LOG (GNUNET_ERROR_TYPE_DEBUG,
2336 "Found existing defragmentation context for %u-byte fragment from `%s'\n",
2337 (unsigned int) ntohs (msg->size),
2338 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2341 if (GNUNET_OK == GNUNET_DEFRAGMENT_process_fragment (d_ctx->defrag, msg))
2343 /* keep this 'rc' from expiring */
2344 GNUNET_CONTAINER_heap_update_cost (plugin->defrag_ctxs, d_ctx->hnode,
2345 (GNUNET_CONTAINER_HeapCostType)
2348 if (GNUNET_CONTAINER_heap_get_size (plugin->defrag_ctxs) >
2349 UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
2351 /* remove 'rc' that was inactive the longest */
2352 d_ctx = GNUNET_CONTAINER_heap_remove_root (plugin->defrag_ctxs);
2353 GNUNET_assert (NULL != d_ctx);
2354 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
2355 GNUNET_free (d_ctx);
2361 * Read and process a message from the given socket.
2363 * @param plugin the overall plugin
2364 * @param rsock socket to read from
2367 udp_select_read (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *rsock)
2371 char buf[65536] GNUNET_ALIGN;
2373 const struct GNUNET_MessageHeader *msg;
2375 fromlen = sizeof (addr);
2376 memset (&addr, 0, sizeof (addr));
2377 size = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof (buf),
2378 (struct sockaddr *) &addr, &fromlen);
2380 /* On SOCK_DGRAM UDP sockets recvfrom might fail with a
2381 * WSAECONNRESET error to indicate that previous sendto() (yes, sendto!)
2382 * on this socket has failed.
2384 * WSAECONNRESET - The virtual circuit was reset by the remote side
2385 * executing a hard or abortive close. The application should close
2386 * the socket; it is no longer usable. On a UDP-datagram socket this
2387 * error indicates a previous send operation resulted in an ICMP Port
2388 * Unreachable message.
2390 if ( (-1 == size) && (ECONNRESET == errno) )
2395 LOG (GNUNET_ERROR_TYPE_DEBUG,
2396 "UDP failed to receive data: %s\n", STRERROR (errno));
2397 /* Connection failure or something. Not a protocol violation. */
2400 if (size < sizeof (struct GNUNET_MessageHeader))
2402 LOG (GNUNET_ERROR_TYPE_WARNING,
2403 "UDP got %u bytes, which is not enough for a GNUnet message header\n",
2404 (unsigned int) size);
2405 /* _MAY_ be a connection failure (got partial message) */
2406 /* But it _MAY_ also be that the other side uses non-GNUnet protocol. */
2407 GNUNET_break_op (0);
2410 msg = (const struct GNUNET_MessageHeader *) buf;
2412 LOG (GNUNET_ERROR_TYPE_DEBUG,
2413 "UDP received %u-byte message from `%s' type %i\n", (unsigned int) size,
2414 GNUNET_a2s ((const struct sockaddr *) addr, fromlen), ntohs (msg->type));
2416 if (size != ntohs (msg->size))
2418 GNUNET_break_op (0);
2422 GNUNET_STATISTICS_update (plugin->env->stats,
2423 "# UDP, total, bytes, received",
2426 switch (ntohs (msg->type))
2428 case GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON:
2429 udp_broadcast_receive (plugin, &buf, size, addr, fromlen);
2432 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
2433 read_process_msg (plugin, msg, addr, fromlen);
2436 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
2437 read_process_ack (plugin, msg, addr, fromlen);
2440 case GNUNET_MESSAGE_TYPE_FRAGMENT:
2441 read_process_fragment (plugin, msg, addr, fromlen);
2445 GNUNET_break_op (0);
2450 static struct UDP_MessageWrapper *
2451 remove_timeout_messages_and_select (struct UDP_MessageWrapper *head,
2452 struct GNUNET_NETWORK_Handle *sock)
2454 struct UDP_MessageWrapper *udpw = NULL;
2455 struct GNUNET_TIME_Relative remaining;
2458 while (udpw != NULL)
2460 /* Find messages with timeout */
2461 remaining = GNUNET_TIME_absolute_get_remaining (udpw->timeout);
2462 if (GNUNET_TIME_UNIT_ZERO.rel_value == remaining.rel_value)
2464 /* Message timed out */
2465 switch (udpw->msg_type) {
2466 case MSG_UNFRAGMENTED:
2467 GNUNET_STATISTICS_update (plugin->env->stats,
2468 "# UDP, total, bytes, sent, timeout",
2469 udpw->msg_size, GNUNET_NO);
2470 GNUNET_STATISTICS_update (plugin->env->stats,
2471 "# UDP, total, messages, sent, timeout",
2473 GNUNET_STATISTICS_update (plugin->env->stats,
2474 "# UDP, unfragmented msgs, messages, sent, timeout",
2476 GNUNET_STATISTICS_update (plugin->env->stats,
2477 "# UDP, unfragmented msgs, bytes, sent, timeout",
2478 udpw->payload_size, GNUNET_NO);
2479 /* Not fragmented message */
2480 LOG (GNUNET_ERROR_TYPE_DEBUG,
2481 "Message for peer `%s' with size %u timed out\n",
2482 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2483 call_continuation (udpw, GNUNET_SYSERR);
2484 /* Remove message */
2485 dequeue (plugin, udpw);
2488 case MSG_FRAGMENTED:
2489 /* Fragmented message */
2490 GNUNET_STATISTICS_update (plugin->env->stats,
2491 "# UDP, total, bytes, sent, timeout",
2492 udpw->frag_ctx->on_wire_size, GNUNET_NO);
2493 GNUNET_STATISTICS_update (plugin->env->stats,
2494 "# UDP, total, messages, sent, timeout",
2496 call_continuation (udpw, GNUNET_SYSERR);
2497 LOG (GNUNET_ERROR_TYPE_DEBUG,
2498 "Fragment for message for peer `%s' with size %u timed out\n",
2499 GNUNET_i2s(&udpw->session->target), udpw->frag_ctx->payload_size);
2502 GNUNET_STATISTICS_update (plugin->env->stats,
2503 "# UDP, fragmented msgs, messages, sent, timeout",
2505 GNUNET_STATISTICS_update (plugin->env->stats,
2506 "# UDP, fragmented msgs, bytes, sent, timeout",
2507 udpw->frag_ctx->payload_size, GNUNET_NO);
2508 /* Remove fragmented message due to timeout */
2509 fragmented_message_done (udpw->frag_ctx, GNUNET_SYSERR);
2512 GNUNET_STATISTICS_update (plugin->env->stats,
2513 "# UDP, total, bytes, sent, timeout",
2514 udpw->msg_size, GNUNET_NO);
2515 GNUNET_STATISTICS_update (plugin->env->stats,
2516 "# UDP, total, messages, sent, timeout",
2518 LOG (GNUNET_ERROR_TYPE_DEBUG,
2519 "ACK Message for peer `%s' with size %u timed out\n",
2520 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2521 call_continuation (udpw, GNUNET_SYSERR);
2522 dequeue (plugin, udpw);
2528 if (sock == plugin->sockv4)
2529 udpw = plugin->ipv4_queue_head;
2530 else if (sock == plugin->sockv6)
2531 udpw = plugin->ipv6_queue_head;
2534 GNUNET_break (0); /* should never happen */
2537 GNUNET_STATISTICS_update (plugin->env->stats,
2538 "# messages dismissed due to timeout",
2543 /* Message did not time out, check flow delay */
2544 remaining = GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer);
2545 if (GNUNET_TIME_UNIT_ZERO.rel_value == remaining.rel_value)
2547 /* this message is not delayed */
2548 LOG (GNUNET_ERROR_TYPE_DEBUG,
2549 "Message for peer `%s' (%u bytes) is not delayed \n",
2550 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2551 break; /* Found message to send, break */
2555 /* Message is delayed, try next */
2556 LOG (GNUNET_ERROR_TYPE_DEBUG,
2557 "Message for peer `%s' (%u bytes) is delayed for %llu \n",
2558 GNUNET_i2s(&udpw->session->target), udpw->payload_size, remaining.rel_value);
2568 analyze_send_error (struct Plugin *plugin,
2569 const struct sockaddr * sa,
2573 static int network_down_error;
2574 struct GNUNET_ATS_Information type;
2576 type = plugin->env->get_address_type (plugin->env->cls,sa, slen);
2577 if (((GNUNET_ATS_NET_LAN == ntohl(type.value)) || (GNUNET_ATS_NET_WAN == ntohl(type.value))) &&
2578 ((ENETUNREACH == errno) || (ENETDOWN == errno)))
2580 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in)))
2582 /* IPv4: "Network unreachable" or "Network down"
2584 * This indicates we do not have connectivity
2586 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2587 _("UDP could not transmit message to `%s': "
2588 "Network seems down, please check your network configuration\n"),
2589 GNUNET_a2s (sa, slen));
2591 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in6)))
2593 /* IPv6: "Network unreachable" or "Network down"
2595 * This indicates that this system is IPv6 enabled, but does not
2596 * have a valid global IPv6 address assigned or we do not have
2600 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2601 _("UDP could not transmit message to `%s': "
2602 "Please check your network configuration and disable IPv6 if your "
2603 "connection does not have a global IPv6 address\n"),
2604 GNUNET_a2s (sa, slen));
2609 LOG (GNUNET_ERROR_TYPE_WARNING,
2610 "UDP could not transmit message to `%s': `%s'\n",
2611 GNUNET_a2s (sa, slen), STRERROR (error));
2616 udp_select_send (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *sock)
2618 const struct sockaddr * sa;
2622 struct UDP_MessageWrapper *udpw = NULL;
2624 /* Find message to send */
2625 udpw = remove_timeout_messages_and_select ((sock == plugin->sockv4) ? plugin->ipv4_queue_head : plugin->ipv6_queue_head,
2628 return 0; /* No message to send */
2630 sa = udpw->session->sock_addr;
2631 slen = udpw->session->addrlen;
2633 sent = GNUNET_NETWORK_socket_sendto (sock, udpw->msg_buf, udpw->msg_size, sa, slen);
2635 if (GNUNET_SYSERR == sent)
2638 analyze_send_error (plugin, sa, slen, errno);
2639 call_continuation(udpw, GNUNET_SYSERR);
2640 GNUNET_STATISTICS_update (plugin->env->stats,
2641 "# UDP, total, bytes, sent, failure",
2643 GNUNET_STATISTICS_update (plugin->env->stats,
2644 "# UDP, total, messages, sent, failure",
2650 LOG (GNUNET_ERROR_TYPE_DEBUG,
2651 "UDP transmitted %u-byte message to `%s' `%s' (%d: %s)\n",
2652 (unsigned int) (udpw->msg_size), GNUNET_i2s(&udpw->session->target) ,GNUNET_a2s (sa, slen), (int) sent,
2653 (sent < 0) ? STRERROR (errno) : "ok");
2654 GNUNET_STATISTICS_update (plugin->env->stats,
2655 "# UDP, total, bytes, sent, success",
2657 GNUNET_STATISTICS_update (plugin->env->stats,
2658 "# UDP, total, messages, sent, success",
2660 if (NULL != udpw->frag_ctx)
2661 udpw->frag_ctx->on_wire_size += udpw->msg_size;
2662 call_continuation (udpw, GNUNET_OK);
2664 dequeue (plugin, udpw);
2673 * We have been notified that our readset has something to read. We don't
2674 * know which socket needs to be read, so we have to check each one
2675 * Then reschedule this function to be called again once more is available.
2677 * @param cls the plugin handle
2678 * @param tc the scheduling context (for rescheduling this function again)
2681 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2683 struct Plugin *plugin = cls;
2685 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
2686 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2688 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
2689 (NULL != plugin->sockv4) &&
2690 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv4)) )
2691 udp_select_read (plugin, plugin->sockv4);
2692 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2693 (NULL != plugin->sockv4) &&
2694 (NULL != plugin->ipv4_queue_head) &&
2695 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv4)) )
2696 udp_select_send (plugin, plugin->sockv4);
2697 schedule_select (plugin);
2702 * We have been notified that our readset has something to read. We don't
2703 * know which socket needs to be read, so we have to check each one
2704 * Then reschedule this function to be called again once more is available.
2706 * @param cls the plugin handle
2707 * @param tc the scheduling context (for rescheduling this function again)
2710 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2712 struct Plugin *plugin = cls;
2714 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2715 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2717 if ( ((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0) &&
2718 (NULL != plugin->sockv6) &&
2719 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv6)) )
2720 udp_select_read (plugin, plugin->sockv6);
2721 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2722 (NULL != plugin->sockv6) && (plugin->ipv6_queue_head != NULL) &&
2723 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv6)) )
2724 udp_select_send (plugin, plugin->sockv6);
2725 schedule_select (plugin);
2731 * @return number of sockets that were successfully bound
2734 setup_sockets (struct Plugin *plugin,
2735 const struct sockaddr_in6 *bind_v6,
2736 const struct sockaddr_in *bind_v4)
2739 int sockets_created = 0;
2740 struct sockaddr_in6 serverAddrv6;
2741 struct sockaddr_in serverAddrv4;
2742 struct sockaddr *serverAddr;
2743 struct sockaddr *addrs[2];
2744 socklen_t addrlens[2];
2748 /* Create IPv6 socket */
2750 if (plugin->enable_ipv6 == GNUNET_YES)
2752 plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
2753 if (NULL == plugin->sockv6)
2755 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2756 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv6 since it is not supported on this system!\n");
2757 plugin->enable_ipv6 = GNUNET_NO;
2761 memset (&serverAddrv6, '\0', sizeof (struct sockaddr_in6));
2762 #if HAVE_SOCKADDR_IN_SIN_LEN
2763 serverAddrv6.sin6_len = sizeof (struct sockaddr_in6);
2765 serverAddrv6.sin6_family = AF_INET6;
2766 if (NULL != bind_v6)
2767 serverAddrv6.sin6_addr = bind_v6->sin6_addr;
2769 serverAddrv6.sin6_addr = in6addr_any;
2771 if (0 == plugin->port) /* autodetect */
2772 serverAddrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2774 serverAddrv6.sin6_port = htons (plugin->port);
2775 addrlen = sizeof (struct sockaddr_in6);
2776 serverAddr = (struct sockaddr *) &serverAddrv6;
2781 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv6 `%s'\n",
2782 GNUNET_a2s (serverAddr, addrlen));
2784 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv6,
2785 serverAddr, addrlen, 0))
2788 if (0 != plugin->port)
2790 tries = 10; /* fail */
2791 break; /* bind failed on specific port */
2794 serverAddrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2799 GNUNET_NETWORK_socket_close (plugin->sockv6);
2800 plugin->enable_ipv6 = GNUNET_NO;
2801 plugin->sockv6 = NULL;
2804 if (plugin->sockv6 != NULL)
2806 LOG (GNUNET_ERROR_TYPE_DEBUG,
2807 "IPv6 socket created on port %s\n",
2808 GNUNET_a2s (serverAddr, addrlen));
2809 addrs[sockets_created] = (struct sockaddr *) &serverAddrv6;
2810 addrlens[sockets_created] = sizeof (struct sockaddr_in6);
2815 LOG (GNUNET_ERROR_TYPE_ERROR,
2816 "Failed to bind UDP socket to %s: %s\n",
2817 GNUNET_a2s (serverAddr, addrlen),
2823 /* Create IPv4 socket */
2825 plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
2826 if (NULL == plugin->sockv4)
2828 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2829 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv4 since it is not supported on this system!\n");
2830 plugin->enable_ipv4 = GNUNET_NO;
2834 memset (&serverAddrv4, '\0', sizeof (struct sockaddr_in));
2835 #if HAVE_SOCKADDR_IN_SIN_LEN
2836 serverAddrv4.sin_len = sizeof (struct sockaddr_in);
2838 serverAddrv4.sin_family = AF_INET;
2839 if (NULL != bind_v4)
2840 serverAddrv4.sin_addr = bind_v4->sin_addr;
2842 serverAddrv4.sin_addr.s_addr = INADDR_ANY;
2844 if (0 == plugin->port)
2846 serverAddrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2848 serverAddrv4.sin_port = htons (plugin->port);
2851 addrlen = sizeof (struct sockaddr_in);
2852 serverAddr = (struct sockaddr *) &serverAddrv4;
2857 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv4 `%s'\n",
2858 GNUNET_a2s (serverAddr, addrlen));
2861 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv4,
2862 serverAddr, addrlen, 0))
2865 if (0 != plugin->port)
2867 tries = 10; /* fail */
2868 break; /* bind failed on specific port */
2872 serverAddrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2878 GNUNET_NETWORK_socket_close (plugin->sockv4);
2879 plugin->enable_ipv4 = GNUNET_NO;
2880 plugin->sockv4 = NULL;
2883 if (plugin->sockv4 != NULL)
2885 LOG (GNUNET_ERROR_TYPE_DEBUG,
2886 "IPv4 socket created on port %s\n", GNUNET_a2s (serverAddr, addrlen));
2887 addrs[sockets_created] = (struct sockaddr *) &serverAddrv4;
2888 addrlens[sockets_created] = sizeof (struct sockaddr_in);
2893 LOG (GNUNET_ERROR_TYPE_ERROR,
2894 "Failed to bind UDP socket to %s: %s\n",
2895 GNUNET_a2s (serverAddr, addrlen), STRERROR (eno));
2899 if (0 == sockets_created)
2901 LOG (GNUNET_ERROR_TYPE_WARNING, _("Failed to open UDP sockets\n"));
2902 return 0; /* No sockets created, return */
2905 /* Create file descriptors */
2906 if (plugin->enable_ipv4 == GNUNET_YES)
2908 plugin->rs_v4 = GNUNET_NETWORK_fdset_create ();
2909 plugin->ws_v4 = GNUNET_NETWORK_fdset_create ();
2910 GNUNET_NETWORK_fdset_zero (plugin->rs_v4);
2911 GNUNET_NETWORK_fdset_zero (plugin->ws_v4);
2912 if (NULL != plugin->sockv4)
2914 GNUNET_NETWORK_fdset_set (plugin->rs_v4, plugin->sockv4);
2915 GNUNET_NETWORK_fdset_set (plugin->ws_v4, plugin->sockv4);
2919 if (plugin->enable_ipv6 == GNUNET_YES)
2921 plugin->rs_v6 = GNUNET_NETWORK_fdset_create ();
2922 plugin->ws_v6 = GNUNET_NETWORK_fdset_create ();
2923 GNUNET_NETWORK_fdset_zero (plugin->rs_v6);
2924 GNUNET_NETWORK_fdset_zero (plugin->ws_v6);
2925 if (NULL != plugin->sockv6)
2927 GNUNET_NETWORK_fdset_set (plugin->rs_v6, plugin->sockv6);
2928 GNUNET_NETWORK_fdset_set (plugin->ws_v6, plugin->sockv6);
2932 schedule_select (plugin);
2933 plugin->nat = GNUNET_NAT_register (plugin->env->cfg,
2934 GNUNET_NO, plugin->port,
2936 (const struct sockaddr **) addrs, addrlens,
2937 &udp_nat_port_map_callback, NULL, plugin);
2939 return sockets_created;
2944 * The exported method. Makes the core api available via a global and
2945 * returns the udp transport API.
2947 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
2948 * @return our 'struct GNUNET_TRANSPORT_PluginFunctions'
2951 libgnunet_plugin_transport_udp_init (void *cls)
2953 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2954 struct GNUNET_TRANSPORT_PluginFunctions *api;
2956 unsigned long long port;
2957 unsigned long long aport;
2958 unsigned long long broadcast;
2959 unsigned long long udp_max_bps;
2960 unsigned long long enable_v6;
2961 char * bind4_address;
2962 char * bind6_address;
2963 char * fancy_interval;
2964 struct GNUNET_TIME_Relative interval;
2965 struct sockaddr_in serverAddrv4;
2966 struct sockaddr_in6 serverAddrv6;
2971 if (NULL == env->receive)
2973 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
2974 initialze the plugin or the API */
2975 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
2977 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
2978 api->address_to_string = &udp_address_to_string;
2979 api->string_to_address = &udp_string_to_address;
2983 GNUNET_assert (NULL != env->stats);
2985 /* Get port number: port == 0 : autodetect a port,
2986 * > 0 : use this port,
2987 * not given : 2086 default */
2989 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp", "PORT",
2993 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
2994 "ADVERTISED_PORT", &aport))
2998 LOG (GNUNET_ERROR_TYPE_WARNING,
2999 _("Given `%s' option is out of range: %llu > %u\n"), "PORT", port,
3006 GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "nat",
3008 enable_v6 = GNUNET_NO;
3010 enable_v6 = GNUNET_YES;
3013 have_bind4 = GNUNET_NO;
3014 memset (&serverAddrv4, 0, sizeof (serverAddrv4));
3016 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3017 "BINDTO", &bind4_address))
3019 LOG (GNUNET_ERROR_TYPE_DEBUG,
3020 "Binding udp plugin to specific address: `%s'\n",
3022 if (1 != inet_pton (AF_INET, bind4_address, &serverAddrv4.sin_addr))
3024 GNUNET_free (bind4_address);
3027 have_bind4 = GNUNET_YES;
3029 GNUNET_free_non_null (bind4_address);
3030 have_bind6 = GNUNET_NO;
3031 memset (&serverAddrv6, 0, sizeof (serverAddrv6));
3033 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3034 "BINDTO6", &bind6_address))
3036 LOG (GNUNET_ERROR_TYPE_DEBUG,
3037 "Binding udp plugin to specific address: `%s'\n",
3040 inet_pton (AF_INET6, bind6_address, &serverAddrv6.sin6_addr))
3042 LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid IPv6 address: `%s'\n"),
3044 GNUNET_free (bind6_address);
3047 have_bind6 = GNUNET_YES;
3049 GNUNET_free_non_null (bind6_address);
3051 /* Initialize my flags */
3054 /* Enable neighbour discovery */
3055 broadcast = GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "transport-udp",
3057 if (broadcast == GNUNET_SYSERR)
3058 broadcast = GNUNET_NO;
3060 if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3061 "BROADCAST_INTERVAL", &fancy_interval))
3063 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
3067 if (GNUNET_SYSERR == GNUNET_STRINGS_fancy_time_to_relative(fancy_interval, &interval))
3069 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30);
3071 GNUNET_free (fancy_interval);
3074 /* Maximum datarate */
3075 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3076 "MAX_BPS", &udp_max_bps))
3078 udp_max_bps = 1024 * 1024 * 50; /* 50 MB/s == infinity for practical purposes */
3081 p = GNUNET_malloc (sizeof (struct Plugin));
3084 p->broadcast_interval = interval;
3085 p->enable_ipv6 = enable_v6;
3086 p->enable_ipv4 = GNUNET_YES; /* default */
3088 p->sessions = GNUNET_CONTAINER_multihashmap_create (10, GNUNET_NO);
3089 p->defrag_ctxs = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
3090 p->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages, p);
3091 GNUNET_BANDWIDTH_tracker_init (&p->tracker,
3092 GNUNET_BANDWIDTH_value_init ((uint32_t)udp_max_bps), 30);
3095 LOG (GNUNET_ERROR_TYPE_DEBUG, "Setting up sockets\n");
3096 res = setup_sockets (p, (GNUNET_YES == have_bind6) ? &serverAddrv6 : NULL,
3097 (GNUNET_YES == have_bind4) ? &serverAddrv4 : NULL);
3098 if ((res == 0) || ((p->sockv4 == NULL) && (p->sockv6 == NULL)))
3100 LOG (GNUNET_ERROR_TYPE_ERROR,
3101 _("Failed to create network sockets, plugin failed\n"));
3102 GNUNET_CONTAINER_multihashmap_destroy (p->sessions);
3103 GNUNET_CONTAINER_heap_destroy (p->defrag_ctxs);
3104 GNUNET_SERVER_mst_destroy (p->mst);
3108 else if (broadcast == GNUNET_YES)
3110 LOG (GNUNET_ERROR_TYPE_DEBUG, "Starting broadcasting\n");
3111 setup_broadcast (p, &serverAddrv6, &serverAddrv4);
3114 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
3117 api->disconnect = &udp_disconnect;
3118 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3119 api->address_to_string = &udp_address_to_string;
3120 api->string_to_address = &udp_string_to_address;
3121 api->check_address = &udp_plugin_check_address;
3122 api->get_session = &udp_plugin_get_session;
3123 api->send = &udp_plugin_send;
3124 api->get_network = &udp_get_network;
3131 heap_cleanup_iterator (void *cls,
3132 struct GNUNET_CONTAINER_HeapNode *
3133 node, void *element,
3134 GNUNET_CONTAINER_HeapCostType
3137 struct DefragContext * d_ctx = element;
3139 GNUNET_CONTAINER_heap_remove_node (node);
3140 GNUNET_DEFRAGMENT_context_destroy(d_ctx->defrag);
3141 GNUNET_free (d_ctx);
3148 * The exported method. Makes the core api available via a global and
3149 * returns the udp transport API.
3151 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
3155 libgnunet_plugin_transport_udp_done (void *cls)
3157 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
3158 struct Plugin *plugin = api->cls;
3159 struct PrettyPrinterContext *cur;
3160 struct PrettyPrinterContext *next;
3168 stop_broadcast (plugin);
3169 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
3171 GNUNET_SCHEDULER_cancel (plugin->select_task);
3172 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
3174 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK)
3176 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
3177 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
3180 /* Closing sockets */
3181 if (GNUNET_YES ==plugin->enable_ipv4)
3183 if (plugin->sockv4 != NULL)
3185 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
3186 plugin->sockv4 = NULL;
3188 GNUNET_NETWORK_fdset_destroy (plugin->rs_v4);
3189 GNUNET_NETWORK_fdset_destroy (plugin->ws_v4);
3191 if (GNUNET_YES ==plugin->enable_ipv6)
3193 if (plugin->sockv6 != NULL)
3195 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
3196 plugin->sockv6 = NULL;
3198 GNUNET_NETWORK_fdset_destroy (plugin->rs_v6);
3199 GNUNET_NETWORK_fdset_destroy (plugin->ws_v6);
3202 if (NULL != plugin->nat)
3203 GNUNET_NAT_unregister (plugin->nat);
3205 if (plugin->defrag_ctxs != NULL)
3207 GNUNET_CONTAINER_heap_iterate(plugin->defrag_ctxs,
3208 heap_cleanup_iterator, NULL);
3209 GNUNET_CONTAINER_heap_destroy(plugin->defrag_ctxs);
3210 plugin->defrag_ctxs = NULL;
3212 if (plugin->mst != NULL)
3214 GNUNET_SERVER_mst_destroy(plugin->mst);
3218 /* Clean up leftover messages */
3219 struct UDP_MessageWrapper * udpw;
3220 udpw = plugin->ipv4_queue_head;
3221 while (udpw != NULL)
3223 struct UDP_MessageWrapper *tmp = udpw->next;
3224 dequeue (plugin, udpw);
3225 call_continuation(udpw, GNUNET_SYSERR);
3230 udpw = plugin->ipv6_queue_head;
3231 while (udpw != NULL)
3233 struct UDP_MessageWrapper *tmp = udpw->next;
3234 dequeue (plugin, udpw);
3235 call_continuation(udpw, GNUNET_SYSERR);
3241 /* Clean up sessions */
3242 LOG (GNUNET_ERROR_TYPE_DEBUG,
3243 "Cleaning up sessions\n");
3244 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions, &disconnect_and_free_it, plugin);
3245 GNUNET_CONTAINER_multihashmap_destroy (plugin->sessions);
3247 next = ppc_dll_head;
3248 for (cur = next; NULL != cur; cur = next)
3251 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, cur);
3252 GNUNET_RESOLVER_request_cancel (cur->resolver_handle);
3253 GNUNET_SCHEDULER_cancel (cur->timeout_task);
3259 GNUNET_free (plugin);
3262 struct Allocation *allocation;
3263 while (NULL != ahead)
3266 GNUNET_CONTAINER_DLL_remove (ahead, atail, allocation);
3267 GNUNET_free (allocation);
3269 struct Allocator *allocator;
3270 while (NULL != aehead)
3273 GNUNET_CONTAINER_DLL_remove (aehead, aetail, allocator);
3274 GNUNET_free (allocator);
3281 /* end of plugin_transport_udp.c */