2 This file is part of GNUnet
3 (C) 2010-2013 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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18 Boston, MA 02111-1307, USA.
22 * @file transport/plugin_transport_udp.c
23 * @brief Implementation of the UDP transport protocol
24 * @author Christian Grothoff
25 * @author Nathan Evans
26 * @author Matthias Wachs
29 #include "plugin_transport_udp.h"
30 #include "gnunet_hello_lib.h"
31 #include "gnunet_util_lib.h"
32 #include "gnunet_fragmentation_lib.h"
33 #include "gnunet_nat_lib.h"
34 #include "gnunet_protocols.h"
35 #include "gnunet_resolver_service.h"
36 #include "gnunet_signatures.h"
37 #include "gnunet_constants.h"
38 #include "gnunet_statistics_service.h"
39 #include "gnunet_transport_service.h"
40 #include "gnunet_transport_plugin.h"
41 #include "transport.h"
43 #define LOG(kind,...) GNUNET_log_from (kind, "transport-udp", __VA_ARGS__)
45 #define PLUGIN_NAME "udp"
48 * Number of messages we can defragment in parallel. We only really
49 * defragment 1 message at a time, but if messages get re-ordered, we
50 * may want to keep knowledge about the previous message to avoid
51 * discarding the current message in favor of a single fragment of a
52 * previous message. 3 should be good since we don't expect massive
53 * message reorderings with UDP.
55 #define UDP_MAX_MESSAGES_IN_DEFRAG 3
58 * We keep a defragmentation queue per sender address. How many
59 * sender addresses do we support at the same time? Memory consumption
60 * is roughly a factor of 32k * UDP_MAX_MESSAGES_IN_DEFRAG times this
61 * value. (So 128 corresponds to 12 MB and should suffice for
62 * connecting to roughly 128 peers via UDP).
64 #define UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG 128
67 * Running pretty printers: head
69 static struct PrettyPrinterContext *ppc_dll_head;
72 * Running pretty printers: tail
74 static struct PrettyPrinterContext *ppc_dll_tail;
77 * Closure for 'append_port'.
79 struct PrettyPrinterContext
84 struct PrettyPrinterContext *next;
89 struct PrettyPrinterContext *prev;
94 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
99 struct GNUNET_RESOLVER_RequestHandle *resolver_handle;
102 * Function to call with the result.
104 GNUNET_TRANSPORT_AddressStringCallback asc;
112 * Port to add after the IP address.
133 MSG_FRAGMENTED_COMPLETE = 2,
134 MSG_UNFRAGMENTED = 3,
142 * Which peer is this session for?
144 struct GNUNET_PeerIdentity target;
146 struct UDP_FragmentationContext * frag_ctx;
149 * Address of the other peer
151 const struct sockaddr *sock_addr;
154 * Desired delay for next sending we send to other peer
156 struct GNUNET_TIME_Relative flow_delay_for_other_peer;
159 * Desired delay for next sending we received from other peer
161 struct GNUNET_TIME_Absolute flow_delay_from_other_peer;
164 * Session timeout task
166 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
169 * expected delay for ACKs
171 struct GNUNET_TIME_Relative last_expected_ack_delay;
174 * desired delay between UDP messages
176 struct GNUNET_TIME_Relative last_expected_msg_delay;
178 struct GNUNET_ATS_Information ats;
191 struct SessionCompareContext
194 const struct GNUNET_HELLO_Address *addr;
199 * Closure for 'process_inbound_tokenized_messages'
201 struct SourceInformation
206 struct GNUNET_PeerIdentity sender;
213 struct Session *session;
215 * Number of bytes in source address.
223 * Closure for 'find_receive_context'.
225 struct FindReceiveContext
228 * Where to store the result.
230 struct DefragContext *rc;
235 const struct sockaddr *addr;
237 struct Session *session;
240 * Number of bytes in 'addr'.
249 * Data structure to track defragmentation contexts based
250 * on the source of the UDP traffic.
256 * Defragmentation context.
258 struct GNUNET_DEFRAGMENT_Context *defrag;
261 * Source address this receive context is for (allocated at the
262 * end of the struct).
264 const struct sockaddr *src_addr;
267 * Reference to master plugin struct.
269 struct Plugin *plugin;
272 * Node in the defrag heap.
274 struct GNUNET_CONTAINER_HeapNode *hnode;
277 * Length of 'src_addr'
285 * Context to send fragmented messages
287 struct UDP_FragmentationContext
290 * Next in linked list
292 struct UDP_FragmentationContext * next;
295 * Previous in linked list
297 struct UDP_FragmentationContext * prev;
302 struct Plugin * plugin;
305 * Handle for GNUNET_FRAGMENT context
307 struct GNUNET_FRAGMENT_Context * frag;
310 * The session this fragmentation context belongs to
312 struct Session * session;
315 * Function to call upon completion of the transmission.
317 GNUNET_TRANSPORT_TransmitContinuation cont;
320 * Closure for 'cont'.
327 struct GNUNET_TIME_Absolute timeout;
330 * Payload size of original unfragmented message
335 * Bytes used to send all fragments on wire including UDP overhead
339 unsigned int fragments_used;
344 struct UDP_MessageWrapper
347 * Session this message belongs to
349 struct Session *session;
355 struct UDP_MessageWrapper *prev;
361 struct UDP_MessageWrapper *next;
365 * According to UDP_MessageType
370 * Message with size msg_size including UDP specific overhead
375 * Size of UDP message to send including UDP specific overhead
380 * Payload size of original message
387 struct GNUNET_TIME_Absolute timeout;
390 * Function to call upon completion of the transmission.
392 GNUNET_TRANSPORT_TransmitContinuation cont;
395 * Closure for 'cont'.
400 * Fragmentation context
401 * frag_ctx == NULL if transport <= MTU
402 * frag_ctx != NULL if transport > MTU
404 struct UDP_FragmentationContext *frag_ctx;
409 * UDP ACK Message-Packet header (after defragmentation).
411 struct UDP_ACK_Message
416 struct GNUNET_MessageHeader header;
419 * Desired delay for flow control
424 * What is the identity of the sender
426 struct GNUNET_PeerIdentity sender;
433 static uint32_t myoptions;
437 * Encapsulation of all of the state of the plugin.
439 struct Plugin * plugin;
443 * We have been notified that our readset has something to read. We don't
444 * know which socket needs to be read, so we have to check each one
445 * Then reschedule this function to be called again once more is available.
447 * @param cls the plugin handle
448 * @param tc the scheduling context (for rescheduling this function again)
451 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
455 * We have been notified that our readset has something to read. We don't
456 * know which socket needs to be read, so we have to check each one
457 * Then reschedule this function to be called again once more is available.
459 * @param cls the plugin handle
460 * @param tc the scheduling context (for rescheduling this function again)
463 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
470 stop_session_timeout (struct Session *s)
472 GNUNET_assert (NULL != s);
474 if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
476 GNUNET_SCHEDULER_cancel (s->timeout_task);
477 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
478 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
479 "Timeout stopped for session %p canceled\n",
486 * (re)schedule select tasks for this plugin.
488 * @param plugin plugin to reschedule
491 schedule_select (struct Plugin *plugin)
493 struct GNUNET_TIME_Relative min_delay;
494 struct UDP_MessageWrapper *udpw;
496 if ((GNUNET_YES == plugin->enable_ipv4) && (NULL != plugin->sockv4))
498 /* Find a message ready to send:
499 * Flow delay from other peer is expired or not set (0) */
500 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
501 for (udpw = plugin->ipv4_queue_head; NULL != udpw; udpw = udpw->next)
502 min_delay = GNUNET_TIME_relative_min (min_delay,
503 GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer));
505 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
506 GNUNET_SCHEDULER_cancel(plugin->select_task);
509 * - write active set if message is ready
510 * - timeout minimum delay */
511 plugin->select_task =
512 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
513 (0 == min_delay.rel_value_us) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
515 (0 == min_delay.rel_value_us) ? plugin->ws_v4 : NULL,
516 &udp_plugin_select, plugin);
518 if ((GNUNET_YES == plugin->enable_ipv6) && (NULL != plugin->sockv6))
520 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
521 for (udpw = plugin->ipv6_queue_head; NULL != udpw; udpw = udpw->next)
522 min_delay = GNUNET_TIME_relative_min (min_delay,
523 GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer));
525 if (GNUNET_SCHEDULER_NO_TASK != plugin->select_task_v6)
526 GNUNET_SCHEDULER_cancel(plugin->select_task_v6);
527 plugin->select_task_v6 =
528 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
529 (0 == min_delay.rel_value_us) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
531 (0 == min_delay.rel_value_us) ? plugin->ws_v6 : NULL,
532 &udp_plugin_select_v6, plugin);
538 * Function called for a quick conversion of the binary address to
539 * a numeric address. Note that the caller must not free the
540 * address and that the next call to this function is allowed
541 * to override the address again.
544 * @param addr binary address
545 * @param addrlen length of the address
546 * @return string representing the same address
549 udp_address_to_string (void *cls, const void *addr, size_t addrlen)
551 static char rbuf[INET6_ADDRSTRLEN + 10];
552 char buf[INET6_ADDRSTRLEN];
556 const struct IPv4UdpAddress *t4;
557 const struct IPv6UdpAddress *t6;
562 if ((NULL != addr) && (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 ((NULL != addr) && (addrlen == sizeof (struct IPv4UdpAddress)))
575 options = ntohl (t4->options);
576 port = ntohs (t4->u4_port);
577 memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
580 else if (addrlen == 0)
582 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s", TRANSPORT_SESSION_INBOUND_STRING);
589 inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
591 GNUNET_snprintf (rbuf, sizeof (rbuf),
592 (af == AF_INET6) ? "%s.%u.[%s]:%u" : "%s.%u.%s:%u",
593 PLUGIN_NAME, options, buf, port);
599 * Function called to convert a string address to
602 * @param cls closure ('struct Plugin*')
603 * @param addr string address
604 * @param addrlen length of the address
605 * @param buf location to store the buffer
606 * @param added location to store the number of bytes in the buffer.
607 * If the function returns GNUNET_SYSERR, its contents are undefined.
608 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
611 udp_string_to_address (void *cls, const char *addr, uint16_t addrlen,
612 void **buf, size_t *added)
614 struct sockaddr_storage socket_address;
620 /* Format tcp.options.address:port */
625 if ((NULL == addr) || (addrlen == 0))
628 return GNUNET_SYSERR;
630 if ('\0' != addr[addrlen - 1])
633 return GNUNET_SYSERR;
635 if (strlen (addr) != addrlen - 1)
638 return GNUNET_SYSERR;
640 plugin = GNUNET_strdup (addr);
641 optionstr = strchr (plugin, '.');
642 if (NULL == optionstr)
645 GNUNET_free (plugin);
646 return GNUNET_SYSERR;
650 options = atol (optionstr);
651 address = strchr (optionstr, '.');
655 GNUNET_free (plugin);
656 return GNUNET_SYSERR;
662 GNUNET_STRINGS_to_address_ip (address, strlen (address),
666 GNUNET_free (plugin);
667 return GNUNET_SYSERR;
670 GNUNET_free (plugin);
672 switch (socket_address.ss_family)
676 struct IPv4UdpAddress *u4;
677 struct sockaddr_in *in4 = (struct sockaddr_in *) &socket_address;
678 u4 = GNUNET_malloc (sizeof (struct IPv4UdpAddress));
679 u4->options = htonl (options);
680 u4->ipv4_addr = in4->sin_addr.s_addr;
681 u4->u4_port = in4->sin_port;
683 *added = sizeof (struct IPv4UdpAddress);
688 struct IPv6UdpAddress *u6;
689 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &socket_address;
690 u6 = GNUNET_malloc (sizeof (struct IPv6UdpAddress));
691 u6->options = htonl (options);
692 u6->ipv6_addr = in6->sin6_addr;
693 u6->u6_port = in6->sin6_port;
695 *added = sizeof (struct IPv6UdpAddress);
700 return GNUNET_SYSERR;
706 ppc_cancel_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
708 struct PrettyPrinterContext *ppc = cls;
709 /* GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PPC %p was not removed!\n", ppc); */
710 ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
711 if (NULL != ppc->resolver_handle)
713 GNUNET_RESOLVER_request_cancel (ppc->resolver_handle);
714 ppc->resolver_handle = NULL;
717 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, ppc);
723 * Append our port and forward the result.
725 * @param cls a 'struct PrettyPrinterContext'
726 * @param hostname result from DNS resolver
729 append_port (void *cls, const char *hostname)
731 struct PrettyPrinterContext *ppc = cls;
732 struct PrettyPrinterContext *cur;
734 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "PPC callback: %p `%s'\n",ppc, hostname); */
735 if (hostname == NULL)
737 ppc->asc (ppc->asc_cls, NULL);
738 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, ppc);
739 GNUNET_SCHEDULER_cancel (ppc->timeout_task);
740 ppc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
741 ppc->resolver_handle = NULL;
742 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "PPC %p was removed!\n", ppc); */
746 for (cur = ppc_dll_head; (NULL != cur); cur = cur->next)
753 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid callback for PPC %p \n", ppc);
757 if (GNUNET_YES == ppc->ipv6)
758 GNUNET_asprintf (&ret, "%s.%u.[%s]:%d", PLUGIN_NAME, ppc->options, hostname, ppc->port);
760 GNUNET_asprintf (&ret, "%s.%u.%s:%d", PLUGIN_NAME, ppc->options, hostname, ppc->port);
761 ppc->asc (ppc->asc_cls, ret);
766 * Convert the transports address to a nice, human-readable
770 * @param type name of the transport that generated the address
771 * @param addr one of the addresses of the host, NULL for the last address
772 * the specific address format depends on the transport
773 * @param addrlen length of the address
774 * @param numeric should (IP) addresses be displayed in numeric form?
775 * @param timeout after how long should we give up?
776 * @param asc function to call on each string
777 * @param asc_cls closure for asc
780 udp_plugin_address_pretty_printer (void *cls, const char *type,
781 const void *addr, size_t addrlen,
783 struct GNUNET_TIME_Relative timeout,
784 GNUNET_TRANSPORT_AddressStringCallback asc,
787 struct PrettyPrinterContext *ppc;
790 struct sockaddr_in a4;
791 struct sockaddr_in6 a6;
792 const struct IPv4UdpAddress *u4;
793 const struct IPv6UdpAddress *u6;
797 if (addrlen == sizeof (struct IPv6UdpAddress))
800 memset (&a6, 0, sizeof (a6));
801 a6.sin6_family = AF_INET6;
802 #if HAVE_SOCKADDR_IN_SIN_LEN
803 a6.sin6_len = sizeof (a6);
805 a6.sin6_port = u6->u6_port;
806 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof (struct in6_addr));
807 port = ntohs (u6->u6_port);
808 options = ntohl (u6->options);
812 else if (addrlen == sizeof (struct IPv4UdpAddress))
815 memset (&a4, 0, sizeof (a4));
816 a4.sin_family = AF_INET;
817 #if HAVE_SOCKADDR_IN_SIN_LEN
818 a4.sin_len = sizeof (a4);
820 a4.sin_port = u4->u4_port;
821 a4.sin_addr.s_addr = u4->ipv4_addr;
822 port = ntohs (u4->u4_port);
823 options = ntohl (u4->options);
827 else if (0 == addrlen)
829 asc (asc_cls, TRANSPORT_SESSION_INBOUND_STRING);
835 /* invalid address */
840 ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
842 ppc->asc_cls = asc_cls;
844 ppc->options = options;
845 if (addrlen == sizeof (struct IPv6UdpAddress))
846 ppc->ipv6 = GNUNET_YES;
848 ppc->ipv6 = GNUNET_NO;
849 ppc->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply(timeout, 2),
850 &ppc_cancel_task, ppc);
851 GNUNET_CONTAINER_DLL_insert (ppc_dll_head, ppc_dll_tail, ppc);
852 /* GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "PPC %p was created!\n", ppc); */
853 ppc->resolver_handle = GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric, timeout, &append_port, ppc);
859 call_continuation (struct UDP_MessageWrapper *udpw, int result)
863 LOG (GNUNET_ERROR_TYPE_DEBUG,
864 "Calling continuation for %u byte message to `%s' with result %s\n",
865 udpw->payload_size, GNUNET_i2s (&udpw->session->target),
866 (GNUNET_OK == result) ? "OK" : "SYSERR");
868 if (udpw->msg_size >= udpw->payload_size)
869 overhead = udpw->msg_size - udpw->payload_size;
871 overhead = udpw->msg_size;
875 switch (udpw->msg_type) {
876 case MSG_UNFRAGMENTED:
877 if (NULL != udpw->cont)
879 /* Transport continuation */
880 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
881 udpw->payload_size, udpw->msg_size);
883 GNUNET_STATISTICS_update (plugin->env->stats,
884 "# UDP, unfragmented msgs, messages, sent, success",
886 GNUNET_STATISTICS_update (plugin->env->stats,
887 "# UDP, unfragmented msgs, bytes payload, sent, success",
888 udpw->payload_size, GNUNET_NO);
889 GNUNET_STATISTICS_update (plugin->env->stats,
890 "# UDP, unfragmented msgs, bytes overhead, sent, success",
891 overhead, GNUNET_NO);
892 GNUNET_STATISTICS_update (plugin->env->stats,
893 "# UDP, total, bytes overhead, sent",
894 overhead, GNUNET_NO);
895 GNUNET_STATISTICS_update (plugin->env->stats,
896 "# UDP, total, bytes payload, sent",
897 udpw->payload_size, GNUNET_NO);
899 case MSG_FRAGMENTED_COMPLETE:
900 GNUNET_assert (NULL != udpw->frag_ctx);
901 if (udpw->frag_ctx->cont != NULL)
902 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_OK,
903 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
904 GNUNET_STATISTICS_update (plugin->env->stats,
905 "# UDP, fragmented msgs, messages, sent, success",
907 GNUNET_STATISTICS_update (plugin->env->stats,
908 "# UDP, fragmented msgs, bytes payload, sent, success",
909 udpw->payload_size, GNUNET_NO);
910 GNUNET_STATISTICS_update (plugin->env->stats,
911 "# UDP, fragmented msgs, bytes overhead, sent, success",
912 overhead, GNUNET_NO);
913 GNUNET_STATISTICS_update (plugin->env->stats,
914 "# UDP, total, bytes overhead, sent",
915 overhead, GNUNET_NO);
916 GNUNET_STATISTICS_update (plugin->env->stats,
917 "# UDP, total, bytes payload, sent",
918 udpw->payload_size, GNUNET_NO);
919 GNUNET_STATISTICS_update (plugin->env->stats,
920 "# UDP, fragmented msgs, messages, pending",
924 /* Fragmented message: enqueue next fragment */
925 if (NULL != udpw->cont)
926 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
927 udpw->payload_size, udpw->msg_size);
928 GNUNET_STATISTICS_update (plugin->env->stats,
929 "# UDP, fragmented msgs, fragments, sent, success",
931 GNUNET_STATISTICS_update (plugin->env->stats,
932 "# UDP, fragmented msgs, fragments bytes, sent, success",
933 udpw->msg_size, GNUNET_NO);
936 /* No continuation */
937 GNUNET_STATISTICS_update (plugin->env->stats,
938 "# UDP, ACK msgs, messages, sent, success",
940 GNUNET_STATISTICS_update (plugin->env->stats,
941 "# UDP, ACK msgs, bytes overhead, sent, success",
942 overhead, GNUNET_NO);
943 GNUNET_STATISTICS_update (plugin->env->stats,
944 "# UDP, total, bytes overhead, sent",
945 overhead, GNUNET_NO);
951 LOG (GNUNET_ERROR_TYPE_ERROR,
952 "ERROR: %u\n", udpw->msg_type);
958 switch (udpw->msg_type) {
959 case MSG_UNFRAGMENTED:
960 /* Unfragmented message: failed to send */
961 if (NULL != udpw->cont)
962 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
963 udpw->payload_size, overhead);
964 GNUNET_STATISTICS_update (plugin->env->stats,
965 "# UDP, unfragmented msgs, messages, sent, failure",
967 GNUNET_STATISTICS_update (plugin->env->stats,
968 "# UDP, unfragmented msgs, bytes payload, sent, failure",
969 udpw->payload_size, GNUNET_NO);
970 GNUNET_STATISTICS_update (plugin->env->stats,
971 "# UDP, unfragmented msgs, bytes overhead, sent, failure",
972 overhead, GNUNET_NO);
974 case MSG_FRAGMENTED_COMPLETE:
975 GNUNET_assert (NULL != udpw->frag_ctx);
976 if (udpw->frag_ctx->cont != NULL)
977 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_SYSERR,
978 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
979 GNUNET_STATISTICS_update (plugin->env->stats,
980 "# UDP, fragmented msgs, messages, sent, failure",
982 GNUNET_STATISTICS_update (plugin->env->stats,
983 "# UDP, fragmented msgs, bytes payload, sent, failure",
984 udpw->payload_size, GNUNET_NO);
985 GNUNET_STATISTICS_update (plugin->env->stats,
986 "# UDP, fragmented msgs, bytes payload, sent, failure",
987 overhead, GNUNET_NO);
988 GNUNET_STATISTICS_update (plugin->env->stats,
989 "# UDP, fragmented msgs, bytes payload, sent, failure",
990 overhead, GNUNET_NO);
991 GNUNET_STATISTICS_update (plugin->env->stats,
992 "# UDP, fragmented msgs, messages, pending",
996 GNUNET_assert (NULL != udpw->frag_ctx);
997 /* Fragmented message: failed to send */
998 GNUNET_STATISTICS_update (plugin->env->stats,
999 "# UDP, fragmented msgs, fragments, sent, failure",
1001 GNUNET_STATISTICS_update (plugin->env->stats,
1002 "# UDP, fragmented msgs, fragments bytes, sent, failure",
1003 udpw->msg_size, GNUNET_NO);
1006 /* ACK message: failed to send */
1007 GNUNET_STATISTICS_update (plugin->env->stats,
1008 "# UDP, ACK msgs, messages, sent, failure",
1012 /* Beacon message: failed to send */
1028 * Check if the given port is plausible (must be either our listen
1029 * port or our advertised port). If it is neither, we return
1032 * @param plugin global variables
1033 * @param in_port port number to check
1034 * @return GNUNET_OK if port is either open_port or adv_port
1037 check_port (struct Plugin *plugin, uint16_t in_port)
1039 if ((in_port == plugin->port) || (in_port == plugin->aport))
1041 return GNUNET_SYSERR;
1046 * Function that will be called to check if a binary address for this
1047 * plugin is well-formed and corresponds to an address for THIS peer
1048 * (as per our configuration). Naturally, if absolutely necessary,
1049 * plugins can be a bit conservative in their answer, but in general
1050 * plugins should make sure that the address does not redirect
1051 * traffic to a 3rd party that might try to man-in-the-middle our
1054 * @param cls closure, should be our handle to the Plugin
1055 * @param addr pointer to the address
1056 * @param addrlen length of addr
1057 * @return GNUNET_OK if this is a plausible address for this peer
1058 * and transport, GNUNET_SYSERR if not
1062 udp_plugin_check_address (void *cls, const void *addr, size_t addrlen)
1064 struct Plugin *plugin = cls;
1065 struct IPv4UdpAddress *v4;
1066 struct IPv6UdpAddress *v6;
1068 if ((addrlen != sizeof (struct IPv4UdpAddress)) &&
1069 (addrlen != sizeof (struct IPv6UdpAddress)))
1071 return GNUNET_SYSERR;
1073 if (addrlen == sizeof (struct IPv4UdpAddress))
1075 v4 = (struct IPv4UdpAddress *) addr;
1076 if (GNUNET_OK != check_port (plugin, ntohs (v4->u4_port)))
1077 return GNUNET_SYSERR;
1079 GNUNET_NAT_test_address (plugin->nat, &v4->ipv4_addr,
1080 sizeof (struct in_addr)))
1081 return GNUNET_SYSERR;
1085 v6 = (struct IPv6UdpAddress *) addr;
1086 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1088 GNUNET_break_op (0);
1089 return GNUNET_SYSERR;
1091 if (GNUNET_OK != check_port (plugin, ntohs (v6->u6_port)))
1092 return GNUNET_SYSERR;
1094 GNUNET_NAT_test_address (plugin->nat, &v6->ipv6_addr,
1095 sizeof (struct in6_addr)))
1096 return GNUNET_SYSERR;
1103 * Task to free resources associated with a session.
1105 * @param s session to free
1108 free_session (struct Session *s)
1110 if (NULL != s->frag_ctx)
1112 GNUNET_FRAGMENT_context_destroy(s->frag_ctx->frag, NULL, NULL);
1113 GNUNET_free (s->frag_ctx);
1121 dequeue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1123 if (plugin->bytes_in_buffer < udpw->msg_size)
1127 GNUNET_STATISTICS_update (plugin->env->stats,
1128 "# UDP, total, bytes in buffers",
1129 - (long long) udpw->msg_size, GNUNET_NO);
1130 plugin->bytes_in_buffer -= udpw->msg_size;
1132 GNUNET_STATISTICS_update (plugin->env->stats,
1133 "# UDP, total, msgs in buffers",
1135 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1136 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_queue_head,
1137 plugin->ipv4_queue_tail, udpw);
1138 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1139 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_queue_head,
1140 plugin->ipv6_queue_tail, udpw);
1145 fragmented_message_done (struct UDP_FragmentationContext *fc, int result)
1147 struct UDP_MessageWrapper *udpw;
1148 struct UDP_MessageWrapper *tmp;
1149 struct UDP_MessageWrapper dummy;
1150 struct Session *s = fc->session;
1152 LOG (GNUNET_ERROR_TYPE_DEBUG,
1153 "%p : Fragmented message removed with result %s\n",
1155 (result == GNUNET_SYSERR) ? "FAIL" : "SUCCESS");
1157 /* Call continuation for fragmented message */
1158 memset (&dummy, 0, sizeof (dummy));
1159 dummy.msg_type = MSG_FRAGMENTED_COMPLETE;
1160 dummy.msg_size = s->frag_ctx->on_wire_size;
1161 dummy.payload_size = s->frag_ctx->payload_size;
1162 dummy.frag_ctx = s->frag_ctx;
1164 dummy.cont_cls = NULL;
1167 call_continuation (&dummy, result);
1169 /* Remove leftover fragments from queue */
1170 if (s->addrlen == sizeof (struct sockaddr_in6))
1172 udpw = plugin->ipv6_queue_head;
1173 while (NULL != udpw)
1176 if ((udpw->frag_ctx != NULL) && (udpw->frag_ctx == s->frag_ctx))
1178 dequeue (plugin, udpw);
1179 call_continuation (udpw, GNUNET_SYSERR);
1185 if (s->addrlen == sizeof (struct sockaddr_in))
1187 udpw = plugin->ipv4_queue_head;
1191 if ((NULL != udpw->frag_ctx) && (udpw->frag_ctx == s->frag_ctx))
1193 dequeue (plugin, udpw);
1194 call_continuation (udpw, GNUNET_SYSERR);
1201 /* Destroy fragmentation context */
1202 GNUNET_FRAGMENT_context_destroy (fc->frag,
1203 &s->last_expected_msg_delay,
1204 &s->last_expected_ack_delay);
1210 * Functions with this signature are called whenever we need
1211 * to close a session due to a disconnect or failure to
1212 * establish a connection.
1214 * @param s session to close down
1217 disconnect_session (struct Session *s)
1219 struct UDP_MessageWrapper *udpw;
1220 struct UDP_MessageWrapper *next;
1222 GNUNET_assert (GNUNET_YES != s->in_destroy);
1223 LOG (GNUNET_ERROR_TYPE_DEBUG,
1224 "Session %p to peer `%s' address ended \n",
1226 GNUNET_i2s (&s->target),
1227 GNUNET_a2s (s->sock_addr, s->addrlen));
1228 stop_session_timeout (s);
1230 if (NULL != s->frag_ctx)
1232 /* Remove fragmented message due to disconnect */
1233 fragmented_message_done (s->frag_ctx, GNUNET_SYSERR);
1236 next = plugin->ipv4_queue_head;
1237 while (NULL != (udpw = next))
1240 if (udpw->session == s)
1242 dequeue (plugin, udpw);
1243 call_continuation(udpw, GNUNET_SYSERR);
1247 next = plugin->ipv6_queue_head;
1248 while (NULL != (udpw = next))
1251 if (udpw->session == s)
1253 dequeue (plugin, udpw);
1254 call_continuation(udpw, GNUNET_SYSERR);
1258 plugin->env->session_end (plugin->env->cls, &s->target, s);
1260 if (NULL != s->frag_ctx)
1262 if (NULL != s->frag_ctx->cont)
1264 s->frag_ctx->cont (s->frag_ctx->cont_cls, &s->target, GNUNET_SYSERR,
1265 s->frag_ctx->payload_size, s->frag_ctx->on_wire_size);
1266 LOG (GNUNET_ERROR_TYPE_DEBUG,
1267 "Calling continuation for fragemented message to `%s' with result SYSERR\n",
1268 GNUNET_i2s (&s->target));
1272 GNUNET_assert (GNUNET_YES ==
1273 GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
1274 &s->target.hashPubKey,
1276 GNUNET_STATISTICS_set(plugin->env->stats,
1277 "# UDP, sessions active",
1278 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1281 s->in_destroy = GNUNET_YES;
1287 * Destroy a session, plugin is being unloaded.
1290 * @param key hash of public key of target peer
1291 * @param value a 'struct PeerSession*' to clean up
1292 * @return GNUNET_OK (continue to iterate)
1295 disconnect_and_free_it (void *cls, const struct GNUNET_HashCode * key, void *value)
1297 disconnect_session(value);
1303 * Disconnect from a remote node. Clean up session if we have one for this peer
1305 * @param cls closure for this call (should be handle to Plugin)
1306 * @param target the peeridentity of the peer to disconnect
1307 * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
1310 udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
1312 struct Plugin *plugin = cls;
1313 GNUNET_assert (plugin != NULL);
1315 GNUNET_assert (target != NULL);
1316 LOG (GNUNET_ERROR_TYPE_DEBUG,
1317 "Disconnecting from peer `%s'\n", GNUNET_i2s (target));
1318 /* Clean up sessions */
1319 GNUNET_CONTAINER_multihashmap_get_multiple (plugin->sessions, &target->hashPubKey, &disconnect_and_free_it, plugin);
1324 * Session was idle, so disconnect it
1327 session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1329 GNUNET_assert (NULL != cls);
1330 struct Session *s = cls;
1332 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1334 "Session %p was idle for %s, disconnecting\n",
1336 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1338 /* call session destroy function */
1339 disconnect_session (s);
1344 * Start session timeout
1347 start_session_timeout (struct Session *s)
1349 GNUNET_assert (NULL != s);
1350 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s->timeout_task);
1351 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1354 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1355 "Timeout for session %p set to %s\n",
1357 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1363 * Increment session timeout due to activity
1366 reschedule_session_timeout (struct Session *s)
1368 GNUNET_assert (NULL != s);
1369 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
1371 GNUNET_SCHEDULER_cancel (s->timeout_task);
1372 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1375 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1376 "Timeout rescheduled for session %p set to %s\n",
1378 GNUNET_STRINGS_relative_time_to_string (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1383 static struct Session *
1384 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
1385 const void *addr, size_t addrlen,
1386 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1389 const struct IPv4UdpAddress *t4;
1390 const struct IPv6UdpAddress *t6;
1391 struct sockaddr_in *v4;
1392 struct sockaddr_in6 *v6;
1403 case sizeof (struct IPv4UdpAddress):
1404 if (NULL == plugin->sockv4)
1406 LOG (GNUNET_ERROR_TYPE_DEBUG,
1407 "Could not create session for peer `%s' address `%s': IPv4 is not enabled\n",
1409 udp_address_to_string(NULL, addr, addrlen));
1413 s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in));
1414 len = sizeof (struct sockaddr_in);
1415 v4 = (struct sockaddr_in *) &s[1];
1416 v4->sin_family = AF_INET;
1417 #if HAVE_SOCKADDR_IN_SIN_LEN
1418 v4->sin_len = sizeof (struct sockaddr_in);
1420 v4->sin_port = t4->u4_port;
1421 v4->sin_addr.s_addr = t4->ipv4_addr;
1422 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v4, sizeof (struct sockaddr_in));
1424 case sizeof (struct IPv6UdpAddress):
1425 if (NULL == plugin->sockv6)
1427 LOG (GNUNET_ERROR_TYPE_INFO,
1428 "Could not create session for peer `%s' address `%s': IPv6 is not enabled\n",
1430 udp_address_to_string(NULL, addr, addrlen));
1434 s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in6));
1435 len = sizeof (struct sockaddr_in6);
1436 v6 = (struct sockaddr_in6 *) &s[1];
1437 v6->sin6_family = AF_INET6;
1438 #if HAVE_SOCKADDR_IN_SIN_LEN
1439 v6->sin6_len = sizeof (struct sockaddr_in6);
1441 v6->sin6_port = t6->u6_port;
1442 v6->sin6_addr = t6->ipv6_addr;
1443 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v6, sizeof (struct sockaddr_in6));
1446 /* Must have a valid address to send to */
1447 GNUNET_STATISTICS_update (plugin->env->stats,
1449 ("# requests to create session with invalid address"),
1454 s->target = *target;
1455 s->sock_addr = (const struct sockaddr *) &s[1];
1456 s->last_expected_ack_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 250);
1457 s->last_expected_msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
1458 s->flow_delay_from_other_peer = GNUNET_TIME_UNIT_ZERO_ABS;
1459 s->flow_delay_for_other_peer = GNUNET_TIME_UNIT_ZERO;
1460 s->inbound = GNUNET_NO;
1461 start_session_timeout (s);
1467 session_cmp_it (void *cls,
1468 const struct GNUNET_HashCode * key,
1471 struct SessionCompareContext * cctx = cls;
1472 const struct GNUNET_HELLO_Address *address = cctx->addr;
1473 struct Session *s = value;
1475 socklen_t s_addrlen = s->addrlen;
1477 LOG (GNUNET_ERROR_TYPE_DEBUG,
1478 "Comparing address %s <-> %s\n",
1479 udp_address_to_string (NULL, (void *) address->address,
1480 address->address_length),
1481 GNUNET_a2s (s->sock_addr, s->addrlen));
1482 if ((address->address_length == sizeof (struct IPv4UdpAddress)) &&
1483 (s_addrlen == sizeof (struct sockaddr_in)))
1485 struct IPv4UdpAddress * u4 = NULL;
1486 u4 = (struct IPv4UdpAddress *) address->address;
1487 GNUNET_assert (NULL != u4);
1488 const struct sockaddr_in *s4 = (const struct sockaddr_in *) s->sock_addr;
1489 if ((0 == memcmp ((const void *) &u4->ipv4_addr,(const void *) &s4->sin_addr, sizeof (struct in_addr))) &&
1490 (u4->u4_port == s4->sin_port))
1497 if ((address->address_length == sizeof (struct IPv6UdpAddress)) &&
1498 (s_addrlen == sizeof (struct sockaddr_in6)))
1500 struct IPv6UdpAddress * u6 = NULL;
1501 u6 = (struct IPv6UdpAddress *) address->address;
1502 GNUNET_assert (NULL != u6);
1503 const struct sockaddr_in6 *s6 = (const struct sockaddr_in6 *) s->sock_addr;
1504 if ((0 == memcmp (&u6->ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr))) &&
1505 (u6->u6_port == s6->sin6_port))
1516 * Function obtain the network type for a session
1518 * @param cls closure ('struct Plugin*')
1519 * @param session the session
1520 * @return the network type in HBO or GNUNET_SYSERR
1522 static enum GNUNET_ATS_Network_Type
1523 udp_get_network (void *cls,
1524 struct Session *session)
1526 return ntohl (session->ats.value);
1531 * Creates a new outbound session the transport service will use to send data to the
1534 * @param cls the plugin
1535 * @param address the address
1536 * @return the session or NULL of max connections exceeded
1538 static struct Session *
1539 udp_plugin_lookup_session (void *cls,
1540 const struct GNUNET_HELLO_Address *address)
1542 struct Plugin * plugin = cls;
1543 struct IPv6UdpAddress * udp_a6;
1544 struct IPv4UdpAddress * udp_a4;
1546 GNUNET_assert (plugin != NULL);
1547 GNUNET_assert (address != NULL);
1550 if ((address->address == NULL) ||
1551 ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1552 (address->address_length != sizeof (struct IPv6UdpAddress))))
1554 LOG (GNUNET_ERROR_TYPE_WARNING,
1555 _("Trying to create session for address of unexpected length %u (should be %u or %u)\n"),
1556 address->address_length,
1557 sizeof (struct IPv4UdpAddress),
1558 sizeof (struct IPv6UdpAddress));
1562 if (address->address_length == sizeof (struct IPv4UdpAddress))
1564 if (plugin->sockv4 == NULL)
1566 udp_a4 = (struct IPv4UdpAddress *) address->address;
1567 if (udp_a4->u4_port == 0)
1571 if (address->address_length == sizeof (struct IPv6UdpAddress))
1573 if (plugin->sockv6 == NULL)
1575 udp_a6 = (struct IPv6UdpAddress *) address->address;
1576 if (udp_a6->u6_port == 0)
1580 /* check if session already exists */
1581 struct SessionCompareContext cctx;
1582 cctx.addr = address;
1584 LOG (GNUNET_ERROR_TYPE_DEBUG,
1585 "Looking for existing session for peer `%s' `%s' \n",
1586 GNUNET_i2s (&address->peer),
1587 udp_address_to_string(NULL, address->address, address->address_length));
1588 GNUNET_CONTAINER_multihashmap_get_multiple(plugin->sessions, &address->peer.hashPubKey, session_cmp_it, &cctx);
1589 if (cctx.res != NULL)
1591 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)
1604 s = create_session (plugin,
1607 address->address_length,
1610 return NULL; /* protocol not supported or address invalid */
1611 LOG (GNUNET_ERROR_TYPE_DEBUG,
1612 "Creating new session %p for peer `%s' address `%s'\n",
1614 GNUNET_i2s(&address->peer),
1615 udp_address_to_string(NULL,address->address,address->address_length));
1616 GNUNET_assert (GNUNET_OK ==
1617 GNUNET_CONTAINER_multihashmap_put (plugin->sessions,
1618 &s->target.hashPubKey,
1620 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1621 GNUNET_STATISTICS_set(plugin->env->stats,
1622 "# UDP, sessions active",
1623 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1630 * Creates a new outbound session the transport service will use to send data to the
1633 * @param cls the plugin
1634 * @param address the address
1635 * @return the session or NULL of max connections exceeded
1637 static struct Session *
1638 udp_plugin_get_session (void *cls,
1639 const struct GNUNET_HELLO_Address *address)
1643 if (NULL == address)
1648 if ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1649 (address->address_length != sizeof (struct IPv6UdpAddress)))
1652 /* otherwise create new */
1653 if (NULL != (s = udp_plugin_lookup_session (cls, address)))
1655 return udp_plugin_create_session (cls, address);
1660 enqueue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1662 if (plugin->bytes_in_buffer + udpw->msg_size > INT64_MAX)
1666 GNUNET_STATISTICS_update (plugin->env->stats,
1667 "# UDP, total, bytes in buffers",
1668 udpw->msg_size, GNUNET_NO);
1669 plugin->bytes_in_buffer += udpw->msg_size;
1671 GNUNET_STATISTICS_update (plugin->env->stats,
1672 "# UDP, total, msgs in buffers",
1674 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1675 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_queue_head,
1676 plugin->ipv4_queue_tail, udpw);
1677 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1678 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_queue_head,
1679 plugin->ipv6_queue_tail, udpw);
1685 * Fragment message was transmitted via UDP, let fragmentation know
1686 * to send the next fragment now.
1688 * @param cls the 'struct UDPMessageWrapper' of the fragment
1689 * @param target destination peer (ignored)
1690 * @param result GNUNET_OK on success (ignored)
1691 * @param payload bytes payload sent
1692 * @param physical bytes physical sent
1695 send_next_fragment (void *cls,
1696 const struct GNUNET_PeerIdentity *target,
1697 int result, size_t payload, size_t physical)
1699 struct UDP_MessageWrapper *udpw = cls;
1701 GNUNET_FRAGMENT_context_transmission_done (udpw->frag_ctx->frag);
1706 * Function that is called with messages created by the fragmentation
1707 * module. In the case of the 'proc' callback of the
1708 * GNUNET_FRAGMENT_context_create function, this function must
1709 * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
1711 * @param cls closure, the 'struct FragmentationContext'
1712 * @param msg the message that was created
1715 enqueue_fragment (void *cls, const struct GNUNET_MessageHeader *msg)
1717 struct UDP_FragmentationContext *frag_ctx = cls;
1718 struct Plugin *plugin = frag_ctx->plugin;
1719 struct UDP_MessageWrapper * udpw;
1720 size_t msg_len = ntohs (msg->size);
1722 LOG (GNUNET_ERROR_TYPE_DEBUG,
1723 "Enqueuing fragment with %u bytes\n", msg_len);
1724 frag_ctx->fragments_used ++;
1725 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msg_len);
1726 udpw->session = frag_ctx->session;
1727 udpw->msg_buf = (char *) &udpw[1];
1728 udpw->msg_size = msg_len;
1729 udpw->payload_size = msg_len; /*FIXME: minus fragment overhead */
1730 udpw->cont = &send_next_fragment;
1731 udpw->cont_cls = udpw;
1732 udpw->timeout = frag_ctx->timeout;
1733 udpw->frag_ctx = frag_ctx;
1734 udpw->msg_type = MSG_FRAGMENTED;
1735 memcpy (udpw->msg_buf, msg, msg_len);
1736 enqueue (plugin, udpw);
1737 schedule_select (plugin);
1742 * Function that can be used by the transport service to transmit
1743 * a message using the plugin. Note that in the case of a
1744 * peer disconnecting, the continuation MUST be called
1745 * prior to the disconnect notification itself. This function
1746 * will be called with this peer's HELLO message to initiate
1747 * a fresh connection to another peer.
1749 * @param cls closure
1750 * @param s which session must be used
1751 * @param msgbuf the message to transmit
1752 * @param msgbuf_size number of bytes in 'msgbuf'
1753 * @param priority how important is the message (most plugins will
1754 * ignore message priority and just FIFO)
1755 * @param to how long to wait at most for the transmission (does not
1756 * require plugins to discard the message after the timeout,
1757 * just advisory for the desired delay; most plugins will ignore
1759 * @param cont continuation to call once the message has
1760 * been transmitted (or if the transport is ready
1761 * for the next transmission call; or if the
1762 * peer disconnected...); can be NULL
1763 * @param cont_cls closure for cont
1764 * @return number of bytes used (on the physical network, with overheads);
1765 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1766 * and does NOT mean that the message was not transmitted (DV)
1769 udp_plugin_send (void *cls,
1771 const char *msgbuf, size_t msgbuf_size,
1772 unsigned int priority,
1773 struct GNUNET_TIME_Relative to,
1774 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1776 struct Plugin *plugin = cls;
1777 size_t udpmlen = msgbuf_size + sizeof (struct UDPMessage);
1778 struct UDP_FragmentationContext * frag_ctx;
1779 struct UDP_MessageWrapper * udpw;
1780 struct UDPMessage *udp;
1782 GNUNET_assert (plugin != NULL);
1783 GNUNET_assert (s != NULL);
1785 if ((s->addrlen == sizeof (struct sockaddr_in6)) && (plugin->sockv6 == NULL))
1786 return GNUNET_SYSERR;
1787 if ((s->addrlen == sizeof (struct sockaddr_in)) && (plugin->sockv4 == NULL))
1788 return GNUNET_SYSERR;
1789 if (udpmlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1792 return GNUNET_SYSERR;
1794 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains_value(plugin->sessions, &s->target.hashPubKey, s))
1797 return GNUNET_SYSERR;
1799 LOG (GNUNET_ERROR_TYPE_DEBUG,
1800 "UDP transmits %u-byte message to `%s' using address `%s'\n",
1802 GNUNET_i2s (&s->target),
1803 GNUNET_a2s(s->sock_addr, s->addrlen));
1807 udp = (struct UDPMessage *) mbuf;
1808 udp->header.size = htons (udpmlen);
1809 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
1810 udp->reserved = htonl (0);
1811 udp->sender = *plugin->env->my_identity;
1813 reschedule_session_timeout(s);
1814 if (udpmlen <= UDP_MTU)
1816 /* unfragmented message */
1817 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + udpmlen);
1819 udpw->msg_buf = (char *) &udpw[1];
1820 udpw->msg_size = udpmlen; /* message size with UDP overhead */
1821 udpw->payload_size = msgbuf_size; /* message size without UDP overhead */
1822 udpw->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1824 udpw->cont_cls = cont_cls;
1825 udpw->frag_ctx = NULL;
1826 udpw->msg_type = MSG_UNFRAGMENTED;
1827 memcpy (udpw->msg_buf, udp, sizeof (struct UDPMessage));
1828 memcpy (&udpw->msg_buf[sizeof (struct UDPMessage)], msgbuf, msgbuf_size);
1829 enqueue (plugin, udpw);
1831 GNUNET_STATISTICS_update (plugin->env->stats,
1832 "# UDP, unfragmented msgs, messages, attempt",
1834 GNUNET_STATISTICS_update (plugin->env->stats,
1835 "# UDP, unfragmented msgs, bytes payload, attempt",
1836 udpw->payload_size, GNUNET_NO);
1840 /* fragmented message */
1841 if (s->frag_ctx != NULL)
1842 return GNUNET_SYSERR;
1843 memcpy (&udp[1], msgbuf, msgbuf_size);
1844 frag_ctx = GNUNET_malloc (sizeof (struct UDP_FragmentationContext));
1845 frag_ctx->plugin = plugin;
1846 frag_ctx->session = s;
1847 frag_ctx->cont = cont;
1848 frag_ctx->cont_cls = cont_cls;
1849 frag_ctx->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1850 frag_ctx->payload_size = msgbuf_size; /* unfragmented message size without UDP overhead */
1851 frag_ctx->on_wire_size = 0; /* bytes with UDP and fragmentation overhead */
1852 frag_ctx->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
1855 s->last_expected_msg_delay,
1856 s->last_expected_ack_delay,
1860 s->frag_ctx = frag_ctx;
1861 GNUNET_STATISTICS_update (plugin->env->stats,
1862 "# UDP, fragmented msgs, messages, pending",
1864 GNUNET_STATISTICS_update (plugin->env->stats,
1865 "# UDP, fragmented msgs, messages, attempt",
1867 GNUNET_STATISTICS_update (plugin->env->stats,
1868 "# UDP, fragmented msgs, bytes payload, attempt",
1869 frag_ctx->payload_size, GNUNET_NO);
1871 schedule_select (plugin);
1877 * Our external IP address/port mapping has changed.
1879 * @param cls closure, the 'struct LocalAddrList'
1880 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1881 * the previous (now invalid) one
1882 * @param addr either the previous or the new public IP address
1883 * @param addrlen actual lenght of the address
1886 udp_nat_port_map_callback (void *cls, int add_remove,
1887 const struct sockaddr *addr, socklen_t addrlen)
1889 struct Plugin *plugin = cls;
1890 struct IPv4UdpAddress u4;
1891 struct IPv6UdpAddress u6;
1895 LOG (GNUNET_ERROR_TYPE_INFO,
1896 "NAT notification to %s address `%s'\n",
1897 (GNUNET_YES == add_remove) ? "add" : "remove",
1898 GNUNET_a2s (addr, addrlen));
1900 /* convert 'addr' to our internal format */
1901 switch (addr->sa_family)
1904 GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
1905 memset (&u4, 0, sizeof (u4));
1906 u4.options = htonl(myoptions);
1907 u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1908 u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
1909 if (0 == ((struct sockaddr_in *) addr)->sin_port)
1912 args = sizeof (struct IPv4UdpAddress);
1915 GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
1916 memset (&u4, 0, sizeof (u4));
1917 u6.options = htonl(myoptions);
1918 if (0 == ((struct sockaddr_in6 *) addr)->sin6_port)
1920 memcpy (&u6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
1921 sizeof (struct in6_addr));
1922 u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
1924 args = sizeof (struct IPv6UdpAddress);
1930 /* modify our published address list */
1931 plugin->env->notify_address (plugin->env->cls, add_remove, arg, args, "udp");
1937 * Message tokenizer has broken up an incomming message. Pass it on
1940 * @param cls the 'struct Plugin'
1941 * @param client the 'struct SourceInformation'
1942 * @param hdr the actual message
1945 process_inbound_tokenized_messages (void *cls, void *client,
1946 const struct GNUNET_MessageHeader *hdr)
1948 struct Plugin *plugin = cls;
1949 struct SourceInformation *si = client;
1950 struct GNUNET_TIME_Relative delay;
1952 GNUNET_assert (si->session != NULL);
1953 if (GNUNET_YES == si->session->in_destroy)
1956 GNUNET_break (ntohl(si->session->ats.value) != GNUNET_ATS_NET_UNSPECIFIED);
1957 delay = plugin->env->receive (plugin->env->cls,
1961 (GNUNET_YES == si->session->inbound) ? NULL : si->arg,
1962 (GNUNET_YES == si->session->inbound) ? 0 : si->args);
1964 plugin->env->update_address_metrics (plugin->env->cls,
1966 (GNUNET_YES == si->session->inbound) ? NULL : si->arg,
1967 (GNUNET_YES == si->session->inbound) ? 0 : si->args,
1969 &si->session->ats, 1);
1971 si->session->flow_delay_for_other_peer = delay;
1972 reschedule_session_timeout(si->session);
1978 * We've received a UDP Message. Process it (pass contents to main service).
1980 * @param plugin plugin context
1981 * @param msg the message
1982 * @param sender_addr sender address
1983 * @param sender_addr_len number of bytes in sender_addr
1986 process_udp_message (struct Plugin *plugin, const struct UDPMessage *msg,
1987 const struct sockaddr *sender_addr,
1988 socklen_t sender_addr_len)
1990 struct SourceInformation si;
1992 struct IPv4UdpAddress u4;
1993 struct IPv6UdpAddress u6;
1997 if (0 != ntohl (msg->reserved))
1999 GNUNET_break_op (0);
2002 if (ntohs (msg->header.size) <
2003 sizeof (struct GNUNET_MessageHeader) + sizeof (struct UDPMessage))
2005 GNUNET_break_op (0);
2009 /* convert address */
2010 switch (sender_addr->sa_family)
2013 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in));
2014 memset (&u4, 0, sizeof (u4));
2015 u6.options = htonl (0);
2016 u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
2017 u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
2022 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in6));
2023 memset (&u6, 0, sizeof (u6));
2024 u6.options = htonl (0);
2025 u6.ipv6_addr = ((struct sockaddr_in6 *) sender_addr)->sin6_addr;
2026 u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
2034 LOG (GNUNET_ERROR_TYPE_DEBUG,
2035 "Received message with %u bytes from peer `%s' at `%s'\n",
2036 (unsigned int) ntohs (msg->header.size), GNUNET_i2s (&msg->sender),
2037 GNUNET_a2s (sender_addr, sender_addr_len));
2039 struct GNUNET_HELLO_Address * address = GNUNET_HELLO_address_allocate(&msg->sender, "udp", arg, args);
2040 if (NULL == (s = udp_plugin_lookup_session (plugin, address)))
2042 s = udp_plugin_create_session(plugin, address);
2043 s->inbound = GNUNET_YES;
2044 plugin->env->session_start (NULL, &address->peer, PLUGIN_NAME,
2045 (GNUNET_YES == s->inbound) ? NULL : address->address,
2046 (GNUNET_YES == s->inbound) ? 0 : address->address_length,
2049 GNUNET_free (address);
2051 /* iterate over all embedded messages */
2053 si.sender = msg->sender;
2057 GNUNET_SERVER_mst_receive (plugin->mst, &si, (const char *) &msg[1],
2058 ntohs (msg->header.size) -
2059 sizeof (struct UDPMessage), GNUNET_YES, GNUNET_NO);
2061 if ( (0 == s->rc) && (GNUNET_YES == s->in_destroy))
2067 * Scan the heap for a receive context with the given address.
2069 * @param cls the 'struct FindReceiveContext'
2070 * @param node internal node of the heap
2071 * @param element value stored at the node (a 'struct ReceiveContext')
2072 * @param cost cost associated with the node
2073 * @return GNUNET_YES if we should continue to iterate,
2077 find_receive_context (void *cls, struct GNUNET_CONTAINER_HeapNode *node,
2078 void *element, GNUNET_CONTAINER_HeapCostType cost)
2080 struct FindReceiveContext *frc = cls;
2081 struct DefragContext *e = element;
2083 if ((frc->addr_len == e->addr_len) &&
2084 (0 == memcmp (frc->addr, e->src_addr, frc->addr_len)))
2094 * Process a defragmented message.
2096 * @param cls the 'struct ReceiveContext'
2097 * @param msg the message
2100 fragment_msg_proc (void *cls, const struct GNUNET_MessageHeader *msg)
2102 struct DefragContext *rc = cls;
2104 if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
2109 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2114 process_udp_message (rc->plugin, (const struct UDPMessage *) msg,
2115 rc->src_addr, rc->addr_len);
2119 struct LookupContext
2121 const struct sockaddr * addr;
2123 struct Session *res;
2130 lookup_session_by_addr_it (void *cls, const struct GNUNET_HashCode * key, void *value)
2132 struct LookupContext *l_ctx = cls;
2133 struct Session * s = value;
2135 if ((s->addrlen == l_ctx->addrlen) &&
2136 (0 == memcmp (s->sock_addr, l_ctx->addr, s->addrlen)))
2146 * Transmit an acknowledgement.
2148 * @param cls the 'struct ReceiveContext'
2149 * @param id message ID (unused)
2150 * @param msg ack to transmit
2153 ack_proc (void *cls, uint32_t id, const struct GNUNET_MessageHeader *msg)
2155 struct DefragContext *rc = cls;
2156 size_t msize = sizeof (struct UDP_ACK_Message) + ntohs (msg->size);
2157 struct UDP_ACK_Message *udp_ack;
2159 struct UDP_MessageWrapper *udpw;
2161 struct LookupContext l_ctx;
2163 l_ctx.addr = rc->src_addr;
2164 l_ctx.addrlen = rc->addr_len;
2166 GNUNET_CONTAINER_multihashmap_iterate (rc->plugin->sessions,
2167 &lookup_session_by_addr_it,
2174 if (s->flow_delay_for_other_peer.rel_value_us <= UINT32_MAX)
2175 delay = s->flow_delay_for_other_peer.rel_value_us;
2177 LOG (GNUNET_ERROR_TYPE_DEBUG,
2178 "Sending ACK to `%s' including delay of %s\n",
2179 GNUNET_a2s (rc->src_addr,
2180 (rc->src_addr->sa_family ==
2181 AF_INET) ? sizeof (struct sockaddr_in) : sizeof (struct
2183 GNUNET_STRINGS_relative_time_to_string (s->flow_delay_for_other_peer,
2185 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msize);
2186 udpw->msg_size = msize;
2187 udpw->payload_size = 0;
2189 udpw->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
2190 udpw->msg_buf = (char *)&udpw[1];
2191 udpw->msg_type = MSG_ACK;
2192 udp_ack = (struct UDP_ACK_Message *) udpw->msg_buf;
2193 udp_ack->header.size = htons ((uint16_t) msize);
2194 udp_ack->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
2195 udp_ack->delay = htonl (delay);
2196 udp_ack->sender = *rc->plugin->env->my_identity;
2197 memcpy (&udp_ack[1], msg, ntohs (msg->size));
2198 enqueue (rc->plugin, udpw);
2203 read_process_msg (struct Plugin *plugin,
2204 const struct GNUNET_MessageHeader *msg,
2208 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2210 GNUNET_break_op (0);
2213 process_udp_message (plugin, (const struct UDPMessage *) msg,
2214 (const struct sockaddr *) addr, fromlen);
2219 read_process_ack (struct Plugin *plugin,
2220 const struct GNUNET_MessageHeader *msg,
2224 const struct GNUNET_MessageHeader *ack;
2225 const struct UDP_ACK_Message *udp_ack;
2226 struct LookupContext l_ctx;
2228 struct GNUNET_TIME_Relative flow_delay;
2230 if (ntohs (msg->size) <
2231 sizeof (struct UDP_ACK_Message) + sizeof (struct GNUNET_MessageHeader))
2233 GNUNET_break_op (0);
2236 udp_ack = (const struct UDP_ACK_Message *) msg;
2237 l_ctx.addr = (const struct sockaddr *) addr;
2238 l_ctx.addrlen = fromlen;
2240 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions,
2241 &lookup_session_by_addr_it,
2245 if ((NULL == s) || (NULL == s->frag_ctx))
2250 flow_delay.rel_value_us = (uint64_t) ntohl (udp_ack->delay);
2251 LOG (GNUNET_ERROR_TYPE_DEBUG,
2252 "We received a sending delay of %s\n",
2253 GNUNET_STRINGS_relative_time_to_string (flow_delay,
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);
2451 static struct UDP_MessageWrapper *
2452 remove_timeout_messages_and_select (struct UDP_MessageWrapper *head,
2453 struct GNUNET_NETWORK_Handle *sock)
2455 struct UDP_MessageWrapper *udpw = NULL;
2456 struct GNUNET_TIME_Relative remaining;
2459 while (udpw != NULL)
2461 /* Find messages with timeout */
2462 remaining = GNUNET_TIME_absolute_get_remaining (udpw->timeout);
2463 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2465 /* Message timed out */
2466 switch (udpw->msg_type) {
2467 case MSG_UNFRAGMENTED:
2468 GNUNET_STATISTICS_update (plugin->env->stats,
2469 "# UDP, total, bytes, sent, timeout",
2470 udpw->msg_size, GNUNET_NO);
2471 GNUNET_STATISTICS_update (plugin->env->stats,
2472 "# UDP, total, messages, sent, timeout",
2474 GNUNET_STATISTICS_update (plugin->env->stats,
2475 "# UDP, unfragmented msgs, messages, sent, timeout",
2477 GNUNET_STATISTICS_update (plugin->env->stats,
2478 "# UDP, unfragmented msgs, bytes, sent, timeout",
2479 udpw->payload_size, GNUNET_NO);
2480 /* Not fragmented message */
2481 LOG (GNUNET_ERROR_TYPE_DEBUG,
2482 "Message for peer `%s' with size %u timed out\n",
2483 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2484 call_continuation (udpw, GNUNET_SYSERR);
2485 /* Remove message */
2486 dequeue (plugin, udpw);
2489 case MSG_FRAGMENTED:
2490 /* Fragmented message */
2491 GNUNET_STATISTICS_update (plugin->env->stats,
2492 "# UDP, total, bytes, sent, timeout",
2493 udpw->frag_ctx->on_wire_size, GNUNET_NO);
2494 GNUNET_STATISTICS_update (plugin->env->stats,
2495 "# UDP, total, messages, sent, timeout",
2497 call_continuation (udpw, GNUNET_SYSERR);
2498 LOG (GNUNET_ERROR_TYPE_DEBUG,
2499 "Fragment for message for peer `%s' with size %u timed out\n",
2500 GNUNET_i2s(&udpw->session->target), udpw->frag_ctx->payload_size);
2503 GNUNET_STATISTICS_update (plugin->env->stats,
2504 "# UDP, fragmented msgs, messages, sent, timeout",
2506 GNUNET_STATISTICS_update (plugin->env->stats,
2507 "# UDP, fragmented msgs, bytes, sent, timeout",
2508 udpw->frag_ctx->payload_size, GNUNET_NO);
2509 /* Remove fragmented message due to timeout */
2510 fragmented_message_done (udpw->frag_ctx, GNUNET_SYSERR);
2513 GNUNET_STATISTICS_update (plugin->env->stats,
2514 "# UDP, total, bytes, sent, timeout",
2515 udpw->msg_size, GNUNET_NO);
2516 GNUNET_STATISTICS_update (plugin->env->stats,
2517 "# UDP, total, messages, sent, timeout",
2519 LOG (GNUNET_ERROR_TYPE_DEBUG,
2520 "ACK Message for peer `%s' with size %u timed out\n",
2521 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2522 call_continuation (udpw, GNUNET_SYSERR);
2523 dequeue (plugin, udpw);
2529 if (sock == plugin->sockv4)
2530 udpw = plugin->ipv4_queue_head;
2531 else if (sock == plugin->sockv6)
2532 udpw = plugin->ipv6_queue_head;
2535 GNUNET_break (0); /* should never happen */
2538 GNUNET_STATISTICS_update (plugin->env->stats,
2539 "# messages dismissed due to timeout",
2544 /* Message did not time out, check flow delay */
2545 remaining = GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer);
2546 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2548 /* this message is not delayed */
2549 LOG (GNUNET_ERROR_TYPE_DEBUG,
2550 "Message for peer `%s' (%u bytes) is not delayed \n",
2551 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2552 break; /* Found message to send, break */
2556 /* Message is delayed, try next */
2557 LOG (GNUNET_ERROR_TYPE_DEBUG,
2558 "Message for peer `%s' (%u bytes) is delayed for %s\n",
2559 GNUNET_i2s(&udpw->session->target), udpw->payload_size,
2560 GNUNET_STRINGS_relative_time_to_string (remaining,
2571 analyze_send_error (struct Plugin *plugin,
2572 const struct sockaddr * sa,
2576 static int network_down_error;
2577 struct GNUNET_ATS_Information type;
2579 type = plugin->env->get_address_type (plugin->env->cls,sa, slen);
2580 if (((GNUNET_ATS_NET_LAN == ntohl(type.value)) || (GNUNET_ATS_NET_WAN == ntohl(type.value))) &&
2581 ((ENETUNREACH == errno) || (ENETDOWN == errno)))
2583 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in)))
2585 /* IPv4: "Network unreachable" or "Network down"
2587 * This indicates we do not have connectivity
2589 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2590 _("UDP could not transmit message to `%s': "
2591 "Network seems down, please check your network configuration\n"),
2592 GNUNET_a2s (sa, slen));
2594 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in6)))
2596 /* IPv6: "Network unreachable" or "Network down"
2598 * This indicates that this system is IPv6 enabled, but does not
2599 * have a valid global IPv6 address assigned or we do not have
2603 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2604 _("UDP could not transmit message to `%s': "
2605 "Please check your network configuration and disable IPv6 if your "
2606 "connection does not have a global IPv6 address\n"),
2607 GNUNET_a2s (sa, slen));
2612 LOG (GNUNET_ERROR_TYPE_WARNING,
2613 "UDP could not transmit message to `%s': `%s'\n",
2614 GNUNET_a2s (sa, slen), STRERROR (error));
2620 udp_select_send (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *sock)
2622 const struct sockaddr * sa;
2626 struct UDP_MessageWrapper *udpw = NULL;
2628 /* Find message to send */
2629 udpw = remove_timeout_messages_and_select ((sock == plugin->sockv4) ? plugin->ipv4_queue_head : plugin->ipv6_queue_head,
2632 return 0; /* No message to send */
2634 sa = udpw->session->sock_addr;
2635 slen = udpw->session->addrlen;
2637 sent = GNUNET_NETWORK_socket_sendto (sock, udpw->msg_buf, udpw->msg_size, sa, slen);
2639 if (GNUNET_SYSERR == sent)
2642 analyze_send_error (plugin, sa, slen, errno);
2643 call_continuation(udpw, GNUNET_SYSERR);
2644 GNUNET_STATISTICS_update (plugin->env->stats,
2645 "# UDP, total, bytes, sent, failure",
2647 GNUNET_STATISTICS_update (plugin->env->stats,
2648 "# UDP, total, messages, sent, failure",
2654 LOG (GNUNET_ERROR_TYPE_DEBUG,
2655 "UDP transmitted %u-byte message to `%s' `%s' (%d: %s)\n",
2656 (unsigned int) (udpw->msg_size), GNUNET_i2s(&udpw->session->target) ,GNUNET_a2s (sa, slen), (int) sent,
2657 (sent < 0) ? STRERROR (errno) : "ok");
2658 GNUNET_STATISTICS_update (plugin->env->stats,
2659 "# UDP, total, bytes, sent, success",
2661 GNUNET_STATISTICS_update (plugin->env->stats,
2662 "# UDP, total, messages, sent, success",
2664 if (NULL != udpw->frag_ctx)
2665 udpw->frag_ctx->on_wire_size += udpw->msg_size;
2666 call_continuation (udpw, GNUNET_OK);
2668 dequeue (plugin, udpw);
2677 * We have been notified that our readset has something to read. We don't
2678 * know which socket needs to be read, so we have to check each one
2679 * Then reschedule this function to be called again once more is available.
2681 * @param cls the plugin handle
2682 * @param tc the scheduling context (for rescheduling this function again)
2685 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2687 struct Plugin *plugin = cls;
2689 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
2690 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2692 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
2693 (NULL != plugin->sockv4) &&
2694 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv4)) )
2695 udp_select_read (plugin, plugin->sockv4);
2696 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2697 (NULL != plugin->sockv4) &&
2698 (NULL != plugin->ipv4_queue_head) &&
2699 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv4)) )
2700 udp_select_send (plugin, plugin->sockv4);
2701 schedule_select (plugin);
2706 * We have been notified that our readset has something to read. We don't
2707 * know which socket needs to be read, so we have to check each one
2708 * Then reschedule this function to be called again once more is available.
2710 * @param cls the plugin handle
2711 * @param tc the scheduling context (for rescheduling this function again)
2714 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2716 struct Plugin *plugin = cls;
2718 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2719 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2721 if ( ((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0) &&
2722 (NULL != plugin->sockv6) &&
2723 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv6)) )
2724 udp_select_read (plugin, plugin->sockv6);
2725 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2726 (NULL != plugin->sockv6) && (plugin->ipv6_queue_head != NULL) &&
2727 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv6)) )
2728 udp_select_send (plugin, plugin->sockv6);
2729 schedule_select (plugin);
2735 * @return number of sockets that were successfully bound
2738 setup_sockets (struct Plugin *plugin,
2739 const struct sockaddr_in6 *bind_v6,
2740 const struct sockaddr_in *bind_v4)
2743 int sockets_created = 0;
2744 struct sockaddr_in6 serverAddrv6;
2745 struct sockaddr_in serverAddrv4;
2746 struct sockaddr *serverAddr;
2747 struct sockaddr *addrs[2];
2748 socklen_t addrlens[2];
2752 /* Create IPv6 socket */
2754 if (plugin->enable_ipv6 == GNUNET_YES)
2756 plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
2757 if (NULL == plugin->sockv6)
2759 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2760 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv6 since it is not supported on this system!\n");
2761 plugin->enable_ipv6 = GNUNET_NO;
2765 memset (&serverAddrv6, '\0', sizeof (struct sockaddr_in6));
2766 #if HAVE_SOCKADDR_IN_SIN_LEN
2767 serverAddrv6.sin6_len = sizeof (struct sockaddr_in6);
2769 serverAddrv6.sin6_family = AF_INET6;
2770 if (NULL != bind_v6)
2771 serverAddrv6.sin6_addr = bind_v6->sin6_addr;
2773 serverAddrv6.sin6_addr = in6addr_any;
2775 if (0 == plugin->port) /* autodetect */
2776 serverAddrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2778 serverAddrv6.sin6_port = htons (plugin->port);
2779 addrlen = sizeof (struct sockaddr_in6);
2780 serverAddr = (struct sockaddr *) &serverAddrv6;
2785 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv6 `%s'\n",
2786 GNUNET_a2s (serverAddr, addrlen));
2788 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv6,
2789 serverAddr, addrlen, 0))
2792 if (0 != plugin->port)
2794 tries = 10; /* fail */
2795 break; /* bind failed on specific port */
2798 serverAddrv6.sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2803 GNUNET_NETWORK_socket_close (plugin->sockv6);
2804 plugin->enable_ipv6 = GNUNET_NO;
2805 plugin->sockv6 = NULL;
2808 if (plugin->sockv6 != NULL)
2810 LOG (GNUNET_ERROR_TYPE_DEBUG,
2811 "IPv6 socket created on port %s\n",
2812 GNUNET_a2s (serverAddr, addrlen));
2813 addrs[sockets_created] = (struct sockaddr *) &serverAddrv6;
2814 addrlens[sockets_created] = sizeof (struct sockaddr_in6);
2819 LOG (GNUNET_ERROR_TYPE_ERROR,
2820 "Failed to bind UDP socket to %s: %s\n",
2821 GNUNET_a2s (serverAddr, addrlen),
2827 /* Create IPv4 socket */
2829 plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
2830 if (NULL == plugin->sockv4)
2832 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2833 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv4 since it is not supported on this system!\n");
2834 plugin->enable_ipv4 = GNUNET_NO;
2838 memset (&serverAddrv4, '\0', sizeof (struct sockaddr_in));
2839 #if HAVE_SOCKADDR_IN_SIN_LEN
2840 serverAddrv4.sin_len = sizeof (struct sockaddr_in);
2842 serverAddrv4.sin_family = AF_INET;
2843 if (NULL != bind_v4)
2844 serverAddrv4.sin_addr = bind_v4->sin_addr;
2846 serverAddrv4.sin_addr.s_addr = INADDR_ANY;
2848 if (0 == plugin->port)
2850 serverAddrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2852 serverAddrv4.sin_port = htons (plugin->port);
2855 addrlen = sizeof (struct sockaddr_in);
2856 serverAddr = (struct sockaddr *) &serverAddrv4;
2861 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv4 `%s'\n",
2862 GNUNET_a2s (serverAddr, addrlen));
2865 if (GNUNET_OK == GNUNET_NETWORK_socket_bind (plugin->sockv4,
2866 serverAddr, addrlen, 0))
2869 if (0 != plugin->port)
2871 tries = 10; /* fail */
2872 break; /* bind failed on specific port */
2876 serverAddrv4.sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000);
2882 GNUNET_NETWORK_socket_close (plugin->sockv4);
2883 plugin->enable_ipv4 = GNUNET_NO;
2884 plugin->sockv4 = NULL;
2887 if (plugin->sockv4 != NULL)
2889 LOG (GNUNET_ERROR_TYPE_DEBUG,
2890 "IPv4 socket created on port %s\n", GNUNET_a2s (serverAddr, addrlen));
2891 addrs[sockets_created] = (struct sockaddr *) &serverAddrv4;
2892 addrlens[sockets_created] = sizeof (struct sockaddr_in);
2897 LOG (GNUNET_ERROR_TYPE_ERROR,
2898 "Failed to bind UDP socket to %s: %s\n",
2899 GNUNET_a2s (serverAddr, addrlen), STRERROR (eno));
2903 if (0 == sockets_created)
2905 LOG (GNUNET_ERROR_TYPE_WARNING, _("Failed to open UDP sockets\n"));
2906 return 0; /* No sockets created, return */
2909 /* Create file descriptors */
2910 if (plugin->enable_ipv4 == GNUNET_YES)
2912 plugin->rs_v4 = GNUNET_NETWORK_fdset_create ();
2913 plugin->ws_v4 = GNUNET_NETWORK_fdset_create ();
2914 GNUNET_NETWORK_fdset_zero (plugin->rs_v4);
2915 GNUNET_NETWORK_fdset_zero (plugin->ws_v4);
2916 if (NULL != plugin->sockv4)
2918 GNUNET_NETWORK_fdset_set (plugin->rs_v4, plugin->sockv4);
2919 GNUNET_NETWORK_fdset_set (plugin->ws_v4, plugin->sockv4);
2923 if (plugin->enable_ipv6 == GNUNET_YES)
2925 plugin->rs_v6 = GNUNET_NETWORK_fdset_create ();
2926 plugin->ws_v6 = GNUNET_NETWORK_fdset_create ();
2927 GNUNET_NETWORK_fdset_zero (plugin->rs_v6);
2928 GNUNET_NETWORK_fdset_zero (plugin->ws_v6);
2929 if (NULL != plugin->sockv6)
2931 GNUNET_NETWORK_fdset_set (plugin->rs_v6, plugin->sockv6);
2932 GNUNET_NETWORK_fdset_set (plugin->ws_v6, plugin->sockv6);
2936 schedule_select (plugin);
2937 plugin->nat = GNUNET_NAT_register (plugin->env->cfg,
2938 GNUNET_NO, plugin->port,
2940 (const struct sockaddr **) addrs, addrlens,
2941 &udp_nat_port_map_callback, NULL, plugin);
2943 return sockets_created;
2948 * The exported method. Makes the core api available via a global and
2949 * returns the udp transport API.
2951 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
2952 * @return our 'struct GNUNET_TRANSPORT_PluginFunctions'
2955 libgnunet_plugin_transport_udp_init (void *cls)
2957 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2958 struct GNUNET_TRANSPORT_PluginFunctions *api;
2960 unsigned long long port;
2961 unsigned long long aport;
2962 unsigned long long broadcast;
2963 unsigned long long udp_max_bps;
2964 unsigned long long enable_v6;
2965 char * bind4_address;
2966 char * bind6_address;
2967 char * fancy_interval;
2968 struct GNUNET_TIME_Relative interval;
2969 struct sockaddr_in serverAddrv4;
2970 struct sockaddr_in6 serverAddrv6;
2975 if (NULL == env->receive)
2977 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
2978 initialze the plugin or the API */
2979 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
2981 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
2982 api->address_to_string = &udp_address_to_string;
2983 api->string_to_address = &udp_string_to_address;
2987 GNUNET_assert (NULL != env->stats);
2989 /* Get port number: port == 0 : autodetect a port,
2990 * > 0 : use this port,
2991 * not given : 2086 default */
2993 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp", "PORT",
2997 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
2998 "ADVERTISED_PORT", &aport))
3002 LOG (GNUNET_ERROR_TYPE_WARNING,
3003 _("Given `%s' option is out of range: %llu > %u\n"), "PORT", port,
3010 GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "nat",
3012 enable_v6 = GNUNET_NO;
3014 enable_v6 = GNUNET_YES;
3017 have_bind4 = GNUNET_NO;
3018 memset (&serverAddrv4, 0, sizeof (serverAddrv4));
3020 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3021 "BINDTO", &bind4_address))
3023 LOG (GNUNET_ERROR_TYPE_DEBUG,
3024 "Binding udp plugin to specific address: `%s'\n",
3026 if (1 != inet_pton (AF_INET, bind4_address, &serverAddrv4.sin_addr))
3028 GNUNET_free (bind4_address);
3031 have_bind4 = GNUNET_YES;
3033 GNUNET_free_non_null (bind4_address);
3034 have_bind6 = GNUNET_NO;
3035 memset (&serverAddrv6, 0, sizeof (serverAddrv6));
3037 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3038 "BINDTO6", &bind6_address))
3040 LOG (GNUNET_ERROR_TYPE_DEBUG,
3041 "Binding udp plugin to specific address: `%s'\n",
3044 inet_pton (AF_INET6, bind6_address, &serverAddrv6.sin6_addr))
3046 LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid IPv6 address: `%s'\n"),
3048 GNUNET_free (bind6_address);
3051 have_bind6 = GNUNET_YES;
3053 GNUNET_free_non_null (bind6_address);
3055 /* Initialize my flags */
3058 /* Enable neighbour discovery */
3059 broadcast = GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "transport-udp",
3061 if (broadcast == GNUNET_SYSERR)
3062 broadcast = GNUNET_NO;
3064 if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3065 "BROADCAST_INTERVAL", &fancy_interval))
3067 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
3071 if (GNUNET_SYSERR == GNUNET_STRINGS_fancy_time_to_relative(fancy_interval, &interval))
3073 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30);
3075 GNUNET_free (fancy_interval);
3078 /* Maximum datarate */
3079 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3080 "MAX_BPS", &udp_max_bps))
3082 udp_max_bps = 1024 * 1024 * 50; /* 50 MB/s == infinity for practical purposes */
3085 p = GNUNET_malloc (sizeof (struct Plugin));
3088 p->broadcast_interval = interval;
3089 p->enable_ipv6 = enable_v6;
3090 p->enable_ipv4 = GNUNET_YES; /* default */
3092 p->sessions = GNUNET_CONTAINER_multihashmap_create (10, GNUNET_NO);
3093 p->defrag_ctxs = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
3094 p->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages, p);
3095 GNUNET_BANDWIDTH_tracker_init (&p->tracker,
3096 GNUNET_BANDWIDTH_value_init ((uint32_t)udp_max_bps), 30);
3099 LOG (GNUNET_ERROR_TYPE_DEBUG, "Setting up sockets\n");
3100 res = setup_sockets (p, (GNUNET_YES == have_bind6) ? &serverAddrv6 : NULL,
3101 (GNUNET_YES == have_bind4) ? &serverAddrv4 : NULL);
3102 if ((res == 0) || ((p->sockv4 == NULL) && (p->sockv6 == NULL)))
3104 LOG (GNUNET_ERROR_TYPE_ERROR,
3105 _("Failed to create network sockets, plugin failed\n"));
3106 GNUNET_CONTAINER_multihashmap_destroy (p->sessions);
3107 GNUNET_CONTAINER_heap_destroy (p->defrag_ctxs);
3108 GNUNET_SERVER_mst_destroy (p->mst);
3112 else if (broadcast == GNUNET_YES)
3114 LOG (GNUNET_ERROR_TYPE_DEBUG, "Starting broadcasting\n");
3115 setup_broadcast (p, &serverAddrv6, &serverAddrv4);
3118 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
3121 api->disconnect = &udp_disconnect;
3122 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3123 api->address_to_string = &udp_address_to_string;
3124 api->string_to_address = &udp_string_to_address;
3125 api->check_address = &udp_plugin_check_address;
3126 api->get_session = &udp_plugin_get_session;
3127 api->send = &udp_plugin_send;
3128 api->get_network = &udp_get_network;
3135 heap_cleanup_iterator (void *cls,
3136 struct GNUNET_CONTAINER_HeapNode *
3137 node, void *element,
3138 GNUNET_CONTAINER_HeapCostType
3141 struct DefragContext * d_ctx = element;
3143 GNUNET_CONTAINER_heap_remove_node (node);
3144 GNUNET_DEFRAGMENT_context_destroy(d_ctx->defrag);
3145 GNUNET_free (d_ctx);
3152 * The exported method. Makes the core api available via a global and
3153 * returns the udp transport API.
3155 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
3159 libgnunet_plugin_transport_udp_done (void *cls)
3161 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
3162 struct Plugin *plugin = api->cls;
3163 struct PrettyPrinterContext *cur;
3164 struct PrettyPrinterContext *next;
3172 stop_broadcast (plugin);
3173 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
3175 GNUNET_SCHEDULER_cancel (plugin->select_task);
3176 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
3178 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK)
3180 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
3181 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
3184 /* Closing sockets */
3185 if (GNUNET_YES ==plugin->enable_ipv4)
3187 if (plugin->sockv4 != NULL)
3189 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
3190 plugin->sockv4 = NULL;
3192 GNUNET_NETWORK_fdset_destroy (plugin->rs_v4);
3193 GNUNET_NETWORK_fdset_destroy (plugin->ws_v4);
3195 if (GNUNET_YES ==plugin->enable_ipv6)
3197 if (plugin->sockv6 != NULL)
3199 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
3200 plugin->sockv6 = NULL;
3202 GNUNET_NETWORK_fdset_destroy (plugin->rs_v6);
3203 GNUNET_NETWORK_fdset_destroy (plugin->ws_v6);
3206 if (NULL != plugin->nat)
3207 GNUNET_NAT_unregister (plugin->nat);
3209 if (plugin->defrag_ctxs != NULL)
3211 GNUNET_CONTAINER_heap_iterate(plugin->defrag_ctxs,
3212 heap_cleanup_iterator, NULL);
3213 GNUNET_CONTAINER_heap_destroy(plugin->defrag_ctxs);
3214 plugin->defrag_ctxs = NULL;
3216 if (plugin->mst != NULL)
3218 GNUNET_SERVER_mst_destroy(plugin->mst);
3222 /* Clean up leftover messages */
3223 struct UDP_MessageWrapper * udpw;
3224 udpw = plugin->ipv4_queue_head;
3225 while (udpw != NULL)
3227 struct UDP_MessageWrapper *tmp = udpw->next;
3228 dequeue (plugin, udpw);
3229 call_continuation(udpw, GNUNET_SYSERR);
3234 udpw = plugin->ipv6_queue_head;
3235 while (udpw != NULL)
3237 struct UDP_MessageWrapper *tmp = udpw->next;
3238 dequeue (plugin, udpw);
3239 call_continuation(udpw, GNUNET_SYSERR);
3245 /* Clean up sessions */
3246 LOG (GNUNET_ERROR_TYPE_DEBUG,
3247 "Cleaning up sessions\n");
3248 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions, &disconnect_and_free_it, plugin);
3249 GNUNET_CONTAINER_multihashmap_destroy (plugin->sessions);
3251 next = ppc_dll_head;
3252 for (cur = next; NULL != cur; cur = next)
3255 GNUNET_CONTAINER_DLL_remove (ppc_dll_head, ppc_dll_tail, cur);
3256 GNUNET_RESOLVER_request_cancel (cur->resolver_handle);
3257 GNUNET_SCHEDULER_cancel (cur->timeout_task);
3263 GNUNET_free (plugin);
3266 struct Allocation *allocation;
3267 while (NULL != ahead)
3270 GNUNET_CONTAINER_DLL_remove (ahead, atail, allocation);
3271 GNUNET_free (allocation);
3273 struct Allocator *allocator;
3274 while (NULL != aehead)
3277 GNUNET_CONTAINER_DLL_remove (aehead, aetail, allocator);
3278 GNUNET_free (allocator);
3285 /* end of plugin_transport_udp.c */