2 This file is part of GNUnet
3 (C) 2010, 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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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.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file transport/plugin_transport_udp.c
23 * @brief Implementation of the UDP transport protocol
24 * @author Christian Grothoff
25 * @author Nathan Evans
26 * @author Matthias Wachs
29 #include "plugin_transport_udp.h"
30 #include "gnunet_hello_lib.h"
31 #include "gnunet_util_lib.h"
32 #include "gnunet_fragmentation_lib.h"
33 #include "gnunet_nat_lib.h"
34 #include "gnunet_protocols.h"
35 #include "gnunet_resolver_service.h"
36 #include "gnunet_signatures.h"
37 #include "gnunet_constants.h"
38 #include "gnunet_statistics_service.h"
39 #include "gnunet_transport_service.h"
40 #include "gnunet_transport_plugin.h"
41 #include "transport.h"
43 #define LOG(kind,...) GNUNET_log_from (kind, "transport-udp", __VA_ARGS__)
47 * Number of messages we can defragment in parallel. We only really
48 * defragment 1 message at a time, but if messages get re-ordered, we
49 * may want to keep knowledge about the previous message to avoid
50 * discarding the current message in favor of a single fragment of a
51 * previous message. 3 should be good since we don't expect massive
52 * message reorderings with UDP.
54 #define UDP_MAX_MESSAGES_IN_DEFRAG 3
57 * We keep a defragmentation queue per sender address. How many
58 * sender addresses do we support at the same time? Memory consumption
59 * is roughly a factor of 32k * UDP_MAX_MESSAGES_IN_DEFRAG times this
60 * value. (So 128 corresponds to 12 MB and should suffice for
61 * connecting to roughly 128 peers via UDP).
63 #define UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG 128
66 #define DEBUG_MALLOC GNUNET_NO
69 * Closure for 'append_port'.
71 struct PrettyPrinterContext
74 * Function to call with the result.
76 GNUNET_TRANSPORT_AddressStringCallback asc;
84 * Port to add after the IP address.
94 MSG_FRAGMENTED_COMPLETE = 2,
103 * Which peer is this session for?
105 struct GNUNET_PeerIdentity target;
107 struct UDP_FragmentationContext * frag_ctx;
110 * Address of the other peer
112 const struct sockaddr *sock_addr;
115 * Desired delay for next sending we send to other peer
117 struct GNUNET_TIME_Relative flow_delay_for_other_peer;
120 * Desired delay for next sending we received from other peer
122 struct GNUNET_TIME_Absolute flow_delay_from_other_peer;
125 * Session timeout task
127 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
130 * expected delay for ACKs
132 struct GNUNET_TIME_Relative last_expected_ack_delay;
135 * desired delay between UDP messages
137 struct GNUNET_TIME_Relative last_expected_msg_delay;
139 struct GNUNET_ATS_Information ats;
150 struct SessionCompareContext
153 const struct GNUNET_HELLO_Address *addr;
158 * Closure for 'process_inbound_tokenized_messages'
160 struct SourceInformation
165 struct GNUNET_PeerIdentity sender;
172 struct Session *session;
174 * Number of bytes in source address.
182 * Closure for 'find_receive_context'.
184 struct FindReceiveContext
187 * Where to store the result.
189 struct DefragContext *rc;
194 const struct sockaddr *addr;
196 struct Session *session;
199 * Number of bytes in 'addr'.
208 * Data structure to track defragmentation contexts based
209 * on the source of the UDP traffic.
215 * Defragmentation context.
217 struct GNUNET_DEFRAGMENT_Context *defrag;
220 * Source address this receive context is for (allocated at the
221 * end of the struct).
223 const struct sockaddr *src_addr;
226 * Reference to master plugin struct.
228 struct Plugin *plugin;
231 * Node in the defrag heap.
233 struct GNUNET_CONTAINER_HeapNode *hnode;
236 * Length of 'src_addr'
244 * Context to send fragmented messages
246 struct UDP_FragmentationContext
249 * Next in linked list
251 struct UDP_FragmentationContext * next;
254 * Previous in linked list
256 struct UDP_FragmentationContext * prev;
261 struct Plugin * plugin;
264 * Handle for GNUNET_FRAGMENT context
266 struct GNUNET_FRAGMENT_Context * frag;
269 * The session this fragmentation context belongs to
271 struct Session * session;
274 * Function to call upon completion of the transmission.
276 GNUNET_TRANSPORT_TransmitContinuation cont;
279 * Closure for 'cont'.
286 struct GNUNET_TIME_Absolute timeout;
289 * Payload size of original unfragmented message
294 * Bytes used to send all fragments on wire including UDP overhead
298 unsigned int fragments_used;
303 struct UDP_MessageWrapper
306 * Session this message belongs to
308 struct Session *session;
314 struct UDP_MessageWrapper *prev;
320 struct UDP_MessageWrapper *next;
324 * According to UDP_MessageType
329 * Message with size msg_size including UDP specific overhead
334 * Size of UDP message to send including UDP specific overhead
339 * Payload size of original message
346 struct GNUNET_TIME_Absolute timeout;
349 * Function to call upon completion of the transmission.
351 GNUNET_TRANSPORT_TransmitContinuation cont;
354 * Closure for 'cont'.
359 * Fragmentation context
360 * frag_ctx == NULL if transport <= MTU
361 * frag_ctx != NULL if transport > MTU
363 struct UDP_FragmentationContext *frag_ctx;
368 * UDP ACK Message-Packet header (after defragmentation).
370 struct UDP_ACK_Message
375 struct GNUNET_MessageHeader header;
378 * Desired delay for flow control
383 * What is the identity of the sender
385 struct GNUNET_PeerIdentity sender;
390 * Encapsulation of all of the state of the plugin.
392 struct Plugin * plugin;
396 * We have been notified that our readset has something to read. We don't
397 * know which socket needs to be read, so we have to check each one
398 * Then reschedule this function to be called again once more is available.
400 * @param cls the plugin handle
401 * @param tc the scheduling context (for rescheduling this function again)
404 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
408 * We have been notified that our readset has something to read. We don't
409 * know which socket needs to be read, so we have to check each one
410 * Then reschedule this function to be called again once more is available.
412 * @param cls the plugin handle
413 * @param tc the scheduling context (for rescheduling this function again)
416 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
420 * Start session timeout
423 start_session_timeout (struct Session *s);
426 * Increment session timeout due to activity
429 reschedule_session_timeout (struct Session *s);
435 stop_session_timeout (struct Session *s);
441 struct Allocator *prev;
442 struct Allocator *next;
444 unsigned int bytes_alloced;
445 unsigned int max_alloced;
449 struct GNUNET_TIME_Absolute max_alloced_when;
450 struct GNUNET_TIME_Absolute last_alloced_when;
454 struct Allocator *aehead;
455 struct Allocator *aetail;
459 struct Allocation *prev;
460 struct Allocation *next;
462 struct Allocator *alloc;
463 unsigned int bytes_alloced;
468 struct Allocation *ahead;
469 struct Allocation *atail;
471 static int bytes_alloced;
473 static struct Allocator *
474 find_allocator (int line)
476 struct Allocator *cur = aehead;
479 if (line == cur->line)
489 static int start = GNUNET_YES;
490 static struct GNUNET_TIME_Absolute next;
491 static struct GNUNET_TIME_Relative rem;
492 struct Allocator *cur = aehead;
495 next = GNUNET_TIME_UNIT_ZERO_ABS;
498 if (0 == (rem = GNUNET_TIME_absolute_get_remaining(next)).rel_value)
500 fprintf (stderr, "Allocated in `%s' total: %5u bytes\n", __FILE__, bytes_alloced);
503 char *last_alloc = GNUNET_strdup (GNUNET_STRINGS_absolute_time_to_string(cur->max_alloced_when));
504 fprintf (stderr, "Allocated from line %4u :%5u bytes (diff %5i bytes, max alloc: %5u @ %s, last alloc %s)\n",
505 cur->line, cur->bytes_alloced, cur->diff, cur->max_alloced,
507 GNUNET_STRINGS_absolute_time_to_string(cur->last_alloced_when));
508 GNUNET_free (last_alloc);
512 fprintf (stderr, "\n");
513 next = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), GNUNET_TIME_UNIT_SECONDS);
520 MEMDEBUG_add_alloc (void *p, size_t size, int line)
523 struct Allocation *alloc = GNUNET_malloc (sizeof (struct Allocation));
524 struct Allocator *allocator = find_allocator(line);
525 if (NULL == allocator)
527 allocator = GNUNET_malloc (sizeof (struct Allocator));
528 allocator->line = line;
529 GNUNET_CONTAINER_DLL_insert (aehead, aetail, allocator);
531 alloc->alloc = allocator;
534 alloc->bytes_alloced = size;
535 allocator->bytes_alloced += size;
536 allocator->last_alloced_when = GNUNET_TIME_absolute_get();
537 if (allocator->bytes_alloced >= allocator->max_alloced)
539 allocator->max_alloced = allocator->bytes_alloced;
540 allocator->max_alloced_when = allocator->last_alloced_when;
542 allocator->diff += size;
543 GNUNET_CONTAINER_DLL_insert (ahead, atail, alloc);
545 bytes_alloced += size;
551 MEMDEBUG_malloc (size_t size, int line)
555 ret = GNUNET_malloc (size);
558 MEMDEBUG_add_alloc (ret, size, line);
565 MEMDEBUG_free (void * alloc, int line)
568 struct Allocation *cur;
569 struct Allocator *allocator;
579 fprintf (stderr, "Unmonitored free from line %4u\n", line);
583 allocator = cur->alloc;
584 if (NULL == allocator)
588 GNUNET_CONTAINER_DLL_remove (ahead, atail, cur);
589 allocator->bytes_alloced -= cur->bytes_alloced;
590 allocator->diff -= cur->bytes_alloced;
591 GNUNET_assert (allocator->bytes_alloced >= 0);
592 bytes_alloced -= cur->bytes_alloced;
593 GNUNET_assert (bytes_alloced >= 0);
600 MEMDEBUG_free_non_null (void * alloc, int line)
603 MEMDEBUG_free (alloc, line);
608 * (re)schedule select tasks for this plugin.
610 * @param plugin plugin to reschedule
613 schedule_select (struct Plugin *plugin)
615 struct GNUNET_TIME_Relative min_delay;
616 struct UDP_MessageWrapper *udpw;
618 if (NULL != plugin->sockv4)
620 /* Find a message ready to send:
621 * Flow delay from other peer is expired or not set (0) */
622 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
623 for (udpw = plugin->ipv4_queue_head; NULL != udpw; udpw = udpw->next)
624 min_delay = GNUNET_TIME_relative_min (min_delay,
625 GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer));
627 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
628 GNUNET_SCHEDULER_cancel(plugin->select_task);
631 * - write active set if message is ready
632 * - timeout minimum delay */
633 plugin->select_task =
634 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
635 (0 == min_delay.rel_value) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
637 (0 == min_delay.rel_value) ? plugin->ws_v4 : NULL,
638 &udp_plugin_select, plugin);
640 if (NULL != plugin->sockv6)
642 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
643 for (udpw = plugin->ipv6_queue_head; NULL != udpw; udpw = udpw->next)
644 min_delay = GNUNET_TIME_relative_min (min_delay,
645 GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer));
647 if (GNUNET_SCHEDULER_NO_TASK != plugin->select_task_v6)
648 GNUNET_SCHEDULER_cancel(plugin->select_task_v6);
649 plugin->select_task_v6 =
650 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
651 (0 == min_delay.rel_value) ? GNUNET_TIME_UNIT_FOREVER_REL : min_delay,
653 (0 == min_delay.rel_value) ? plugin->ws_v6 : NULL,
654 &udp_plugin_select_v6, plugin);
660 * Function called for a quick conversion of the binary address to
661 * a numeric address. Note that the caller must not free the
662 * address and that the next call to this function is allowed
663 * to override the address again.
666 * @param addr binary address
667 * @param addrlen length of the address
668 * @return string representing the same address
671 udp_address_to_string (void *cls, const void *addr, size_t addrlen)
673 static char rbuf[INET6_ADDRSTRLEN + 10];
674 char buf[INET6_ADDRSTRLEN];
678 const struct IPv4UdpAddress *t4;
679 const struct IPv6UdpAddress *t6;
683 if (addrlen == sizeof (struct IPv6UdpAddress))
687 port = ntohs (t6->u6_port);
688 memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
691 else if (addrlen == sizeof (struct IPv4UdpAddress))
695 port = ntohs (t4->u4_port);
696 memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
704 inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
705 GNUNET_snprintf (rbuf, sizeof (rbuf), (af == AF_INET6) ? "[%s]:%u" : "%s:%u",
712 * Function called to convert a string address to
715 * @param cls closure ('struct Plugin*')
716 * @param addr string address
717 * @param addrlen length of the address
718 * @param buf location to store the buffer
719 * @param added location to store the number of bytes in the buffer.
720 * If the function returns GNUNET_SYSERR, its contents are undefined.
721 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
724 udp_string_to_address (void *cls, const char *addr, uint16_t addrlen,
725 void **buf, size_t *added)
727 struct sockaddr_storage socket_address;
729 if ((NULL == addr) || (0 == addrlen))
732 return GNUNET_SYSERR;
735 if ('\0' != addr[addrlen - 1])
737 return GNUNET_SYSERR;
740 if (strlen (addr) != addrlen - 1)
742 return GNUNET_SYSERR;
745 if (GNUNET_OK != GNUNET_STRINGS_to_address_ip (addr, strlen (addr),
748 return GNUNET_SYSERR;
751 switch (socket_address.ss_family)
755 struct IPv4UdpAddress *u4;
756 struct sockaddr_in *in4 = (struct sockaddr_in *) &socket_address;
757 u4 = MEMDEBUG_malloc (sizeof (struct IPv4UdpAddress), __LINE__ );
758 u4->ipv4_addr = in4->sin_addr.s_addr;
759 u4->u4_port = in4->sin_port;
761 *added = sizeof (struct IPv4UdpAddress);
766 struct IPv6UdpAddress *u6;
767 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &socket_address;
768 u6 = MEMDEBUG_malloc (sizeof (struct IPv6UdpAddress), __LINE__ );
769 u6->ipv6_addr = in6->sin6_addr;
770 u6->u6_port = in6->sin6_port;
772 *added = sizeof (struct IPv6UdpAddress);
777 return GNUNET_SYSERR;
783 * Append our port and forward the result.
785 * @param cls a 'struct PrettyPrinterContext'
786 * @param hostname result from DNS resolver
789 append_port (void *cls, const char *hostname)
791 struct PrettyPrinterContext *ppc = cls;
794 if (hostname == NULL)
796 ppc->asc (ppc->asc_cls, NULL);
797 MEMDEBUG_free (ppc, __LINE__);
800 GNUNET_asprintf (&ret, "%s:%d", hostname, ppc->port);
801 MEMDEBUG_add_alloc (ret, strlen (ret)+ 1, __LINE__);
802 ppc->asc (ppc->asc_cls, ret);
803 MEMDEBUG_free (ret, __LINE__);
808 * Convert the transports address to a nice, human-readable
812 * @param type name of the transport that generated the address
813 * @param addr one of the addresses of the host, NULL for the last address
814 * the specific address format depends on the transport
815 * @param addrlen length of the address
816 * @param numeric should (IP) addresses be displayed in numeric form?
817 * @param timeout after how long should we give up?
818 * @param asc function to call on each string
819 * @param asc_cls closure for asc
822 udp_plugin_address_pretty_printer (void *cls, const char *type,
823 const void *addr, size_t addrlen,
825 struct GNUNET_TIME_Relative timeout,
826 GNUNET_TRANSPORT_AddressStringCallback asc,
829 struct PrettyPrinterContext *ppc;
832 struct sockaddr_in a4;
833 struct sockaddr_in6 a6;
834 const struct IPv4UdpAddress *u4;
835 const struct IPv6UdpAddress *u6;
838 if (addrlen == sizeof (struct IPv6UdpAddress))
841 memset (&a6, 0, sizeof (a6));
842 a6.sin6_family = AF_INET6;
843 #if HAVE_SOCKADDR_IN_SIN_LEN
844 a6.sin6_len = sizeof (a6);
846 a6.sin6_port = u6->u6_port;
847 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof (struct in6_addr));
848 port = ntohs (u6->u6_port);
852 else if (addrlen == sizeof (struct IPv4UdpAddress))
855 memset (&a4, 0, sizeof (a4));
856 a4.sin_family = AF_INET;
857 #if HAVE_SOCKADDR_IN_SIN_LEN
858 a4.sin_len = sizeof (a4);
860 a4.sin_port = u4->u4_port;
861 a4.sin_addr.s_addr = u4->ipv4_addr;
862 port = ntohs (u4->u4_port);
866 else if (0 == addrlen)
868 asc (asc_cls, "<inbound connection>");
874 /* invalid address */
879 ppc = MEMDEBUG_malloc (sizeof (struct PrettyPrinterContext), __LINE__ );
881 ppc->asc_cls = asc_cls;
883 GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric, timeout, &append_port, ppc);
888 call_continuation (struct UDP_MessageWrapper *udpw, int result)
892 LOG (GNUNET_ERROR_TYPE_DEBUG,
893 "Calling continuation for %u byte message to `%s' with result %s\n",
894 udpw->payload_size, GNUNET_i2s (&udpw->session->target),
895 (GNUNET_OK == result) ? "OK" : "SYSERR");
897 if (udpw->msg_size >= udpw->payload_size)
898 overhead = udpw->msg_size - udpw->payload_size;
900 overhead = udpw->msg_size;
904 switch (udpw->msg_type) {
905 case MSG_UNFRAGMENTED:
906 if (NULL != udpw->cont)
908 /* Transport continuation */
909 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
910 udpw->payload_size, udpw->msg_size);
912 GNUNET_STATISTICS_update (plugin->env->stats,
913 "# UDP, unfragmented msgs, messages, sent, success",
915 GNUNET_STATISTICS_update (plugin->env->stats,
916 "# UDP, unfragmented msgs, bytes payload, sent, success",
917 udpw->payload_size, GNUNET_NO);
918 GNUNET_STATISTICS_update (plugin->env->stats,
919 "# UDP, unfragmented msgs, bytes overhead, sent, success",
920 overhead, GNUNET_NO);
921 GNUNET_STATISTICS_update (plugin->env->stats,
922 "# UDP, total, bytes overhead, sent",
923 overhead, GNUNET_NO);
924 GNUNET_STATISTICS_update (plugin->env->stats,
925 "# UDP, total, bytes payload, sent",
926 udpw->payload_size, GNUNET_NO);
928 case MSG_FRAGMENTED_COMPLETE:
929 GNUNET_assert (NULL != udpw->frag_ctx);
930 if (udpw->frag_ctx->cont != NULL)
931 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_OK,
932 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
933 GNUNET_STATISTICS_update (plugin->env->stats,
934 "# UDP, fragmented msgs, messages, sent, success",
936 GNUNET_STATISTICS_update (plugin->env->stats,
937 "# UDP, fragmented msgs, bytes payload, sent, success",
938 udpw->payload_size, GNUNET_NO);
939 GNUNET_STATISTICS_update (plugin->env->stats,
940 "# UDP, fragmented msgs, bytes overhead, sent, success",
941 overhead, GNUNET_NO);
942 GNUNET_STATISTICS_update (plugin->env->stats,
943 "# UDP, total, bytes overhead, sent",
944 overhead, GNUNET_NO);
945 GNUNET_STATISTICS_update (plugin->env->stats,
946 "# UDP, total, bytes payload, sent",
947 udpw->payload_size, GNUNET_NO);
948 GNUNET_STATISTICS_update (plugin->env->stats,
949 "# UDP, fragmented msgs, messages, pending",
953 /* Fragmented message: enqueue next fragment */
954 if (NULL != udpw->cont)
955 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
956 udpw->payload_size, udpw->msg_size);
957 GNUNET_STATISTICS_update (plugin->env->stats,
958 "# UDP, fragmented msgs, fragments, sent, success",
960 GNUNET_STATISTICS_update (plugin->env->stats,
961 "# UDP, fragmented msgs, fragments bytes, sent, success",
962 udpw->msg_size, GNUNET_NO);
965 /* No continuation */
966 GNUNET_STATISTICS_update (plugin->env->stats,
967 "# UDP, ACK msgs, messages, sent, success",
969 GNUNET_STATISTICS_update (plugin->env->stats,
970 "# UDP, ACK msgs, bytes overhead, sent, success",
971 overhead, GNUNET_NO);
972 GNUNET_STATISTICS_update (plugin->env->stats,
973 "# UDP, total, bytes overhead, sent",
974 overhead, GNUNET_NO);
980 LOG (GNUNET_ERROR_TYPE_ERROR,
981 "ERROR: %u\n", udpw->msg_type);
987 switch (udpw->msg_type) {
988 case MSG_UNFRAGMENTED:
989 /* Unfragmented message: failed to send */
990 if (NULL != udpw->cont)
991 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
992 udpw->payload_size, overhead);
993 GNUNET_STATISTICS_update (plugin->env->stats,
994 "# UDP, unfragmented msgs, messages, sent, failure",
996 GNUNET_STATISTICS_update (plugin->env->stats,
997 "# UDP, unfragmented msgs, bytes payload, sent, failure",
998 udpw->payload_size, GNUNET_NO);
999 GNUNET_STATISTICS_update (plugin->env->stats,
1000 "# UDP, unfragmented msgs, bytes overhead, sent, failure",
1001 overhead, GNUNET_NO);
1003 case MSG_FRAGMENTED_COMPLETE:
1004 GNUNET_assert (NULL != udpw->frag_ctx);
1005 if (udpw->frag_ctx->cont != NULL)
1006 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target, GNUNET_SYSERR,
1007 udpw->frag_ctx->payload_size, udpw->frag_ctx->on_wire_size);
1008 GNUNET_STATISTICS_update (plugin->env->stats,
1009 "# UDP, fragmented msgs, messages, sent, failure",
1011 GNUNET_STATISTICS_update (plugin->env->stats,
1012 "# UDP, fragmented msgs, bytes payload, sent, failure",
1013 udpw->payload_size, GNUNET_NO);
1014 GNUNET_STATISTICS_update (plugin->env->stats,
1015 "# UDP, fragmented msgs, bytes payload, sent, failure",
1016 overhead, GNUNET_NO);
1017 GNUNET_STATISTICS_update (plugin->env->stats,
1018 "# UDP, fragmented msgs, bytes payload, sent, failure",
1019 overhead, GNUNET_NO);
1020 GNUNET_STATISTICS_update (plugin->env->stats,
1021 "# UDP, fragmented msgs, messages, pending",
1024 case MSG_FRAGMENTED:
1025 GNUNET_assert (NULL != udpw->frag_ctx);
1026 /* Fragmented message: failed to send */
1027 GNUNET_STATISTICS_update (plugin->env->stats,
1028 "# UDP, fragmented msgs, fragments, sent, failure",
1030 GNUNET_STATISTICS_update (plugin->env->stats,
1031 "# UDP, fragmented msgs, fragments bytes, sent, failure",
1032 udpw->msg_size, GNUNET_NO);
1035 /* ACK message: failed to send */
1036 GNUNET_STATISTICS_update (plugin->env->stats,
1037 "# UDP, ACK msgs, messages, sent, failure",
1041 /* Beacon message: failed to send */
1057 * Check if the given port is plausible (must be either our listen
1058 * port or our advertised port). If it is neither, we return
1061 * @param plugin global variables
1062 * @param in_port port number to check
1063 * @return GNUNET_OK if port is either open_port or adv_port
1066 check_port (struct Plugin *plugin, uint16_t in_port)
1068 if ((in_port == plugin->port) || (in_port == plugin->aport))
1070 return GNUNET_SYSERR;
1075 * Function that will be called to check if a binary address for this
1076 * plugin is well-formed and corresponds to an address for THIS peer
1077 * (as per our configuration). Naturally, if absolutely necessary,
1078 * plugins can be a bit conservative in their answer, but in general
1079 * plugins should make sure that the address does not redirect
1080 * traffic to a 3rd party that might try to man-in-the-middle our
1083 * @param cls closure, should be our handle to the Plugin
1084 * @param addr pointer to the address
1085 * @param addrlen length of addr
1086 * @return GNUNET_OK if this is a plausible address for this peer
1087 * and transport, GNUNET_SYSERR if not
1091 udp_plugin_check_address (void *cls, const void *addr, size_t addrlen)
1093 struct Plugin *plugin = cls;
1094 struct IPv4UdpAddress *v4;
1095 struct IPv6UdpAddress *v6;
1097 if ((addrlen != sizeof (struct IPv4UdpAddress)) &&
1098 (addrlen != sizeof (struct IPv6UdpAddress)))
1100 GNUNET_break_op (0);
1101 return GNUNET_SYSERR;
1103 if (addrlen == sizeof (struct IPv4UdpAddress))
1105 v4 = (struct IPv4UdpAddress *) addr;
1106 if (GNUNET_OK != check_port (plugin, ntohs (v4->u4_port)))
1107 return GNUNET_SYSERR;
1109 GNUNET_NAT_test_address (plugin->nat, &v4->ipv4_addr,
1110 sizeof (struct in_addr)))
1111 return GNUNET_SYSERR;
1115 v6 = (struct IPv6UdpAddress *) addr;
1116 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1118 GNUNET_break_op (0);
1119 return GNUNET_SYSERR;
1121 if (GNUNET_OK != check_port (plugin, ntohs (v6->u6_port)))
1122 return GNUNET_SYSERR;
1124 GNUNET_NAT_test_address (plugin->nat, &v6->ipv6_addr,
1125 sizeof (struct in6_addr)))
1126 return GNUNET_SYSERR;
1133 * Task to free resources associated with a session.
1135 * @param s session to free
1138 free_session (struct Session *s)
1140 if (NULL != s->frag_ctx)
1142 GNUNET_FRAGMENT_context_destroy(s->frag_ctx->frag, NULL, NULL);
1143 MEMDEBUG_free (s->frag_ctx, __LINE__);
1146 MEMDEBUG_free (s, __LINE__);
1151 dequeue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1153 if (plugin->bytes_in_buffer < udpw->msg_size)
1157 GNUNET_STATISTICS_update (plugin->env->stats,
1158 "# UDP, total, bytes in buffers",
1159 - (long long) udpw->msg_size, GNUNET_NO);
1160 plugin->bytes_in_buffer -= udpw->msg_size;
1162 GNUNET_STATISTICS_update (plugin->env->stats,
1163 "# UDP, total, msgs in buffers",
1165 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1166 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_queue_head,
1167 plugin->ipv4_queue_tail, udpw);
1168 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1169 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_queue_head,
1170 plugin->ipv6_queue_tail, udpw);
1174 fragmented_message_done (struct UDP_FragmentationContext *fc, int result)
1176 struct UDP_MessageWrapper *udpw;
1177 struct UDP_MessageWrapper *tmp;
1178 struct UDP_MessageWrapper dummy;
1179 struct Session *s = fc->session;
1181 LOG (GNUNET_ERROR_TYPE_DEBUG, "%p : Fragmented message removed with result %s\n", fc, (result == GNUNET_SYSERR) ? "FAIL" : "SUCCESS");
1183 /* Call continuation for fragmented message */
1184 memset (&dummy, 0, sizeof (dummy));
1185 dummy.msg_type = MSG_FRAGMENTED_COMPLETE;
1186 dummy.msg_size = s->frag_ctx->on_wire_size;
1187 dummy.payload_size = s->frag_ctx->payload_size;
1188 dummy.frag_ctx = s->frag_ctx;
1190 dummy.cont_cls = NULL;
1193 call_continuation (&dummy, result);
1195 /* Remove leftover fragments from queue */
1196 if (s->addrlen == sizeof (struct sockaddr_in6))
1198 udpw = plugin->ipv6_queue_head;
1199 while (NULL != udpw)
1202 if ((udpw->frag_ctx != NULL) && (udpw->frag_ctx == s->frag_ctx))
1204 dequeue (plugin, udpw);
1205 call_continuation (udpw, GNUNET_SYSERR);
1206 MEMDEBUG_free (udpw, __LINE__);
1211 if (s->addrlen == sizeof (struct sockaddr_in))
1213 udpw = plugin->ipv4_queue_head;
1217 if ((NULL != udpw->frag_ctx) && (udpw->frag_ctx == s->frag_ctx))
1219 dequeue (plugin, udpw);
1220 call_continuation (udpw, GNUNET_SYSERR);
1221 MEMDEBUG_free (udpw, __LINE__);
1227 /* Destroy fragmentation context */
1228 GNUNET_FRAGMENT_context_destroy (fc->frag,
1229 &s->last_expected_msg_delay,
1230 &s->last_expected_ack_delay);
1232 MEMDEBUG_free (fc , __LINE__);
1236 * Functions with this signature are called whenever we need
1237 * to close a session due to a disconnect or failure to
1238 * establish a connection.
1240 * @param s session to close down
1243 disconnect_session (struct Session *s)
1245 struct UDP_MessageWrapper *udpw;
1246 struct UDP_MessageWrapper *next;
1248 GNUNET_assert (GNUNET_YES != s->in_destroy);
1249 LOG (GNUNET_ERROR_TYPE_DEBUG,
1250 "Session %p to peer `%s' address ended \n",
1252 GNUNET_i2s (&s->target),
1253 GNUNET_a2s (s->sock_addr, s->addrlen));
1254 stop_session_timeout (s);
1256 if (NULL != s->frag_ctx)
1258 /* Remove fragmented message due to disconnect */
1259 fragmented_message_done (s->frag_ctx, GNUNET_SYSERR);
1262 next = plugin->ipv4_queue_head;
1263 while (NULL != (udpw = next))
1266 if (udpw->session == s)
1268 dequeue (plugin, udpw);
1269 call_continuation(udpw, GNUNET_SYSERR);
1270 MEMDEBUG_free (udpw, __LINE__);
1273 next = plugin->ipv6_queue_head;
1274 while (NULL != (udpw = next))
1277 if (udpw->session == s)
1279 dequeue (plugin, udpw);
1280 call_continuation(udpw, GNUNET_SYSERR);
1281 MEMDEBUG_free (udpw, __LINE__);
1285 plugin->env->session_end (plugin->env->cls, &s->target, s);
1287 if (NULL != s->frag_ctx)
1289 if (NULL != s->frag_ctx->cont)
1291 s->frag_ctx->cont (s->frag_ctx->cont_cls, &s->target, GNUNET_SYSERR,
1292 s->frag_ctx->payload_size, s->frag_ctx->on_wire_size);
1293 LOG (GNUNET_ERROR_TYPE_DEBUG,
1294 "Calling continuation for fragemented message to `%s' with result SYSERR\n",
1295 GNUNET_i2s (&s->target));
1299 GNUNET_assert (GNUNET_YES ==
1300 GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
1301 &s->target.hashPubKey,
1303 GNUNET_STATISTICS_set(plugin->env->stats,
1304 "# UDP, sessions active",
1305 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1308 s->in_destroy = GNUNET_YES;
1314 * Destroy a session, plugin is being unloaded.
1317 * @param key hash of public key of target peer
1318 * @param value a 'struct PeerSession*' to clean up
1319 * @return GNUNET_OK (continue to iterate)
1322 disconnect_and_free_it (void *cls, const struct GNUNET_HashCode * key, void *value)
1324 disconnect_session(value);
1330 * Disconnect from a remote node. Clean up session if we have one for this peer
1332 * @param cls closure for this call (should be handle to Plugin)
1333 * @param target the peeridentity of the peer to disconnect
1334 * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
1337 udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
1339 struct Plugin *plugin = cls;
1340 GNUNET_assert (plugin != NULL);
1342 GNUNET_assert (target != NULL);
1343 LOG (GNUNET_ERROR_TYPE_DEBUG,
1344 "Disconnecting from peer `%s'\n", GNUNET_i2s (target));
1345 /* Clean up sessions */
1346 GNUNET_CONTAINER_multihashmap_get_multiple (plugin->sessions, &target->hashPubKey, &disconnect_and_free_it, plugin);
1351 * Session was idle, so disconnect it
1354 session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1356 GNUNET_assert (NULL != cls);
1357 struct Session *s = cls;
1359 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1360 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1361 "Session %p was idle for %llu ms, disconnecting\n",
1362 s, (unsigned long long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
1363 /* call session destroy function */
1364 disconnect_session (s);
1369 * Start session timeout
1372 start_session_timeout (struct Session *s)
1374 GNUNET_assert (NULL != s);
1375 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s->timeout_task);
1376 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1379 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1380 "Timeout for session %p set to %llu ms\n",
1381 s, (unsigned long long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
1386 * Increment session timeout due to activity
1389 reschedule_session_timeout (struct Session *s)
1391 GNUNET_assert (NULL != s);
1392 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
1394 GNUNET_SCHEDULER_cancel (s->timeout_task);
1395 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1399 "Timeout rescheduled for session %p set to %llu ms\n",
1400 s, (unsigned long long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
1408 stop_session_timeout (struct Session *s)
1410 GNUNET_assert (NULL != s);
1412 if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
1414 GNUNET_SCHEDULER_cancel (s->timeout_task);
1415 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1416 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1417 "Timeout stopped for session %p canceled\n",
1418 s, (unsigned long long) GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
1423 static struct Session *
1424 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
1425 const void *addr, size_t addrlen,
1426 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1429 const struct IPv4UdpAddress *t4;
1430 const struct IPv6UdpAddress *t6;
1431 struct sockaddr_in *v4;
1432 struct sockaddr_in6 *v6;
1437 case sizeof (struct IPv4UdpAddress):
1438 if (NULL == plugin->sockv4)
1443 s = MEMDEBUG_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in), __LINE__ );
1444 len = sizeof (struct sockaddr_in);
1445 v4 = (struct sockaddr_in *) &s[1];
1446 v4->sin_family = AF_INET;
1447 #if HAVE_SOCKADDR_IN_SIN_LEN
1448 v4->sin_len = sizeof (struct sockaddr_in);
1450 v4->sin_port = t4->u4_port;
1451 v4->sin_addr.s_addr = t4->ipv4_addr;
1452 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v4, sizeof (struct sockaddr_in));
1454 case sizeof (struct IPv6UdpAddress):
1455 if (NULL == plugin->sockv6)
1461 MEMDEBUG_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in6), __LINE__ );
1462 len = sizeof (struct sockaddr_in6);
1463 v6 = (struct sockaddr_in6 *) &s[1];
1464 v6->sin6_family = AF_INET6;
1465 #if HAVE_SOCKADDR_IN_SIN_LEN
1466 v6->sin6_len = sizeof (struct sockaddr_in6);
1468 v6->sin6_port = t6->u6_port;
1469 v6->sin6_addr = t6->ipv6_addr;
1470 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v6, sizeof (struct sockaddr_in6));
1473 /* Must have a valid address to send to */
1474 GNUNET_break_op (0);
1478 s->target = *target;
1479 s->sock_addr = (const struct sockaddr *) &s[1];
1480 s->last_expected_ack_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 250);
1481 s->last_expected_msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
1482 s->flow_delay_from_other_peer = GNUNET_TIME_UNIT_ZERO_ABS;
1483 s->flow_delay_for_other_peer = GNUNET_TIME_UNIT_ZERO;
1484 start_session_timeout (s);
1490 session_cmp_it (void *cls,
1491 const struct GNUNET_HashCode * key,
1494 struct SessionCompareContext * cctx = cls;
1495 const struct GNUNET_HELLO_Address *address = cctx->addr;
1496 struct Session *s = value;
1498 socklen_t s_addrlen = s->addrlen;
1500 LOG (GNUNET_ERROR_TYPE_DEBUG, "Comparing address %s <-> %s\n",
1501 udp_address_to_string (NULL, (void *) address->address, address->address_length),
1502 GNUNET_a2s (s->sock_addr, s->addrlen));
1503 if ((address->address_length == sizeof (struct IPv4UdpAddress)) &&
1504 (s_addrlen == sizeof (struct sockaddr_in)))
1506 struct IPv4UdpAddress * u4 = NULL;
1507 u4 = (struct IPv4UdpAddress *) address->address;
1508 const struct sockaddr_in *s4 = (const struct sockaddr_in *) s->sock_addr;
1509 if ((0 == memcmp ((const void *) &u4->ipv4_addr,(const void *) &s4->sin_addr, sizeof (struct in_addr))) &&
1510 (u4->u4_port == s4->sin_port))
1517 if ((address->address_length == sizeof (struct IPv6UdpAddress)) &&
1518 (s_addrlen == sizeof (struct sockaddr_in6)))
1520 struct IPv6UdpAddress * u6 = NULL;
1521 u6 = (struct IPv6UdpAddress *) address->address;
1522 const struct sockaddr_in6 *s6 = (const struct sockaddr_in6 *) s->sock_addr;
1523 if ((0 == memcmp (&u6->ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr))) &&
1524 (u6->u6_port == s6->sin6_port))
1535 * Creates a new outbound session the transport service will use to send data to the
1538 * @param cls the plugin
1539 * @param address the address
1540 * @return the session or NULL of max connections exceeded
1542 static struct Session *
1543 udp_plugin_get_session (void *cls,
1544 const struct GNUNET_HELLO_Address *address)
1546 struct Session * s = NULL;
1547 struct Plugin * plugin = cls;
1548 struct IPv6UdpAddress * udp_a6;
1549 struct IPv4UdpAddress * udp_a4;
1551 GNUNET_assert (plugin != NULL);
1552 GNUNET_assert (address != NULL);
1555 if ((address->address == NULL) ||
1556 ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1557 (address->address_length != 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);
1596 /* otherwise create new */
1597 s = create_session (plugin,
1600 address->address_length,
1602 LOG (GNUNET_ERROR_TYPE_DEBUG,
1603 "Creating new session %p for peer `%s' address `%s'\n",
1605 GNUNET_i2s(&address->peer),
1606 udp_address_to_string(NULL,address->address,address->address_length));
1607 GNUNET_assert (GNUNET_OK ==
1608 GNUNET_CONTAINER_multihashmap_put (plugin->sessions,
1609 &s->target.hashPubKey,
1611 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1612 GNUNET_STATISTICS_set(plugin->env->stats,
1613 "# UDP, sessions active",
1614 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
1620 enqueue (struct Plugin *plugin, struct UDP_MessageWrapper * udpw)
1622 if (plugin->bytes_in_buffer + udpw->msg_size > INT64_MAX)
1626 GNUNET_STATISTICS_update (plugin->env->stats,
1627 "# UDP, total, bytes in buffers",
1628 udpw->msg_size, GNUNET_NO);
1629 plugin->bytes_in_buffer += udpw->msg_size;
1631 GNUNET_STATISTICS_update (plugin->env->stats,
1632 "# UDP, total, msgs in buffers",
1634 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
1635 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_queue_head,
1636 plugin->ipv4_queue_tail, udpw);
1637 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
1638 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_queue_head,
1639 plugin->ipv6_queue_tail, udpw);
1645 * Fragment message was transmitted via UDP, let fragmentation know
1646 * to send the next fragment now.
1648 * @param cls the 'struct UDPMessageWrapper' of the fragment
1649 * @param target destination peer (ignored)
1650 * @param result GNUNET_OK on success (ignored)
1651 * @param payload bytes payload sent
1652 * @param physical bytes physical sent
1655 send_next_fragment (void *cls,
1656 const struct GNUNET_PeerIdentity *target,
1657 int result, size_t payload, size_t physical)
1659 struct UDP_MessageWrapper *udpw = cls;
1660 GNUNET_FRAGMENT_context_transmission_done (udpw->frag_ctx->frag);
1665 * Function that is called with messages created by the fragmentation
1666 * module. In the case of the 'proc' callback of the
1667 * GNUNET_FRAGMENT_context_create function, this function must
1668 * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
1670 * @param cls closure, the 'struct FragmentationContext'
1671 * @param msg the message that was created
1674 enqueue_fragment (void *cls, const struct GNUNET_MessageHeader *msg)
1676 struct UDP_FragmentationContext *frag_ctx = cls;
1677 struct Plugin *plugin = frag_ctx->plugin;
1678 struct UDP_MessageWrapper * udpw;
1679 size_t msg_len = ntohs (msg->size);
1681 LOG (GNUNET_ERROR_TYPE_DEBUG,
1682 "Enqueuing fragment with %u bytes\n", msg_len);
1683 frag_ctx->fragments_used ++;
1684 udpw = MEMDEBUG_malloc (sizeof (struct UDP_MessageWrapper) + msg_len, __LINE__ );
1685 udpw->session = frag_ctx->session;
1686 udpw->msg_buf = (char *) &udpw[1];
1687 udpw->msg_size = msg_len;
1688 udpw->payload_size = msg_len; /*FIXME: minus fragment overhead */
1689 udpw->cont = &send_next_fragment;
1690 udpw->cont_cls = udpw;
1691 udpw->timeout = frag_ctx->timeout;
1692 udpw->frag_ctx = frag_ctx;
1693 udpw->msg_type = MSG_FRAGMENTED;
1694 memcpy (udpw->msg_buf, msg, msg_len);
1695 enqueue (plugin, udpw);
1696 schedule_select (plugin);
1701 * Function that can be used by the transport service to transmit
1702 * a message using the plugin. Note that in the case of a
1703 * peer disconnecting, the continuation MUST be called
1704 * prior to the disconnect notification itself. This function
1705 * will be called with this peer's HELLO message to initiate
1706 * a fresh connection to another peer.
1708 * @param cls closure
1709 * @param s which session must be used
1710 * @param msgbuf the message to transmit
1711 * @param msgbuf_size number of bytes in 'msgbuf'
1712 * @param priority how important is the message (most plugins will
1713 * ignore message priority and just FIFO)
1714 * @param to how long to wait at most for the transmission (does not
1715 * require plugins to discard the message after the timeout,
1716 * just advisory for the desired delay; most plugins will ignore
1718 * @param cont continuation to call once the message has
1719 * been transmitted (or if the transport is ready
1720 * for the next transmission call; or if the
1721 * peer disconnected...); can be NULL
1722 * @param cont_cls closure for cont
1723 * @return number of bytes used (on the physical network, with overheads);
1724 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1725 * and does NOT mean that the message was not transmitted (DV)
1728 udp_plugin_send (void *cls,
1730 const char *msgbuf, size_t msgbuf_size,
1731 unsigned int priority,
1732 struct GNUNET_TIME_Relative to,
1733 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1735 struct Plugin *plugin = cls;
1736 size_t udpmlen = msgbuf_size + sizeof (struct UDPMessage);
1737 struct UDP_FragmentationContext * frag_ctx;
1738 struct UDP_MessageWrapper * udpw;
1739 struct UDPMessage *udp;
1741 GNUNET_assert (plugin != NULL);
1742 GNUNET_assert (s != NULL);
1744 if ((s->addrlen == sizeof (struct sockaddr_in6)) && (plugin->sockv6 == NULL))
1745 return GNUNET_SYSERR;
1746 if ((s->addrlen == sizeof (struct sockaddr_in)) && (plugin->sockv4 == NULL))
1747 return GNUNET_SYSERR;
1748 if (udpmlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1751 return GNUNET_SYSERR;
1753 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains_value(plugin->sessions, &s->target.hashPubKey, s))
1756 return GNUNET_SYSERR;
1758 LOG (GNUNET_ERROR_TYPE_DEBUG,
1759 "UDP transmits %u-byte message to `%s' using address `%s'\n",
1761 GNUNET_i2s (&s->target),
1762 GNUNET_a2s(s->sock_addr, s->addrlen));
1766 udp = (struct UDPMessage *) mbuf;
1767 udp->header.size = htons (udpmlen);
1768 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
1769 udp->reserved = htonl (0);
1770 udp->sender = *plugin->env->my_identity;
1772 reschedule_session_timeout(s);
1773 if (udpmlen <= UDP_MTU)
1775 /* unfragmented message */
1776 udpw = MEMDEBUG_malloc (sizeof (struct UDP_MessageWrapper) + udpmlen, __LINE__ );
1778 udpw->msg_buf = (char *) &udpw[1];
1779 udpw->msg_size = udpmlen; /* message size with UDP overhead */
1780 udpw->payload_size = msgbuf_size; /* message size without UDP overhead */
1781 udpw->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1783 udpw->cont_cls = cont_cls;
1784 udpw->frag_ctx = NULL;
1785 udpw->msg_type = MSG_UNFRAGMENTED;
1786 memcpy (udpw->msg_buf, udp, sizeof (struct UDPMessage));
1787 memcpy (&udpw->msg_buf[sizeof (struct UDPMessage)], msgbuf, msgbuf_size);
1788 enqueue (plugin, udpw);
1790 GNUNET_STATISTICS_update (plugin->env->stats,
1791 "# UDP, unfragmented msgs, messages, attempt",
1793 GNUNET_STATISTICS_update (plugin->env->stats,
1794 "# UDP, unfragmented msgs, bytes payload, attempt",
1795 udpw->payload_size, GNUNET_NO);
1799 /* fragmented message */
1800 if (s->frag_ctx != NULL)
1801 return GNUNET_SYSERR;
1802 memcpy (&udp[1], msgbuf, msgbuf_size);
1803 frag_ctx = MEMDEBUG_malloc (sizeof (struct UDP_FragmentationContext), __LINE__ );
1804 frag_ctx->plugin = plugin;
1805 frag_ctx->session = s;
1806 frag_ctx->cont = cont;
1807 frag_ctx->cont_cls = cont_cls;
1808 frag_ctx->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1809 frag_ctx->payload_size = msgbuf_size; /* unfragmented message size without UDP overhead */
1810 frag_ctx->on_wire_size = 0; /* bytes with UDP and fragmentation overhead */
1811 frag_ctx->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
1814 s->last_expected_msg_delay,
1815 s->last_expected_ack_delay,
1819 s->frag_ctx = frag_ctx;
1820 GNUNET_STATISTICS_update (plugin->env->stats,
1821 "# UDP, fragmented msgs, messages, pending",
1823 GNUNET_STATISTICS_update (plugin->env->stats,
1824 "# UDP, fragmented msgs, messages, attempt",
1826 GNUNET_STATISTICS_update (plugin->env->stats,
1827 "# UDP, fragmented msgs, bytes payload, attempt",
1828 frag_ctx->payload_size, GNUNET_NO);
1830 schedule_select (plugin);
1836 * Our external IP address/port mapping has changed.
1838 * @param cls closure, the 'struct LocalAddrList'
1839 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1840 * the previous (now invalid) one
1841 * @param addr either the previous or the new public IP address
1842 * @param addrlen actual lenght of the address
1845 udp_nat_port_map_callback (void *cls, int add_remove,
1846 const struct sockaddr *addr, socklen_t addrlen)
1848 struct Plugin *plugin = cls;
1849 struct IPv4UdpAddress u4;
1850 struct IPv6UdpAddress u6;
1854 /* convert 'addr' to our internal format */
1855 switch (addr->sa_family)
1858 GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
1859 u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1860 u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
1865 GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
1866 memcpy (&u6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
1867 sizeof (struct in6_addr));
1868 u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
1876 /* modify our published address list */
1877 plugin->env->notify_address (plugin->env->cls, add_remove, arg, args, "udp");
1883 * Message tokenizer has broken up an incomming message. Pass it on
1886 * @param cls the 'struct Plugin'
1887 * @param client the 'struct SourceInformation'
1888 * @param hdr the actual message
1891 process_inbound_tokenized_messages (void *cls, void *client,
1892 const struct GNUNET_MessageHeader *hdr)
1894 struct Plugin *plugin = cls;
1895 struct SourceInformation *si = client;
1896 struct GNUNET_TIME_Relative delay;
1898 GNUNET_assert (si->session != NULL);
1899 if (GNUNET_YES == si->session->in_destroy)
1902 GNUNET_break (ntohl(si->session->ats.value) != GNUNET_ATS_NET_UNSPECIFIED);
1903 delay = plugin->env->receive (plugin->env->cls,
1910 plugin->env->update_address_metrics (plugin->env->cls,
1915 &si->session->ats, 1);
1917 si->session->flow_delay_for_other_peer = delay;
1918 reschedule_session_timeout(si->session);
1924 * We've received a UDP Message. Process it (pass contents to main service).
1926 * @param plugin plugin context
1927 * @param msg the message
1928 * @param sender_addr sender address
1929 * @param sender_addr_len number of bytes in sender_addr
1932 process_udp_message (struct Plugin *plugin, const struct UDPMessage *msg,
1933 const struct sockaddr *sender_addr,
1934 socklen_t sender_addr_len)
1936 struct SourceInformation si;
1938 struct IPv4UdpAddress u4;
1939 struct IPv6UdpAddress u6;
1943 if (0 != ntohl (msg->reserved))
1945 GNUNET_break_op (0);
1948 if (ntohs (msg->header.size) <
1949 sizeof (struct GNUNET_MessageHeader) + sizeof (struct UDPMessage))
1951 GNUNET_break_op (0);
1955 /* convert address */
1956 switch (sender_addr->sa_family)
1959 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in));
1960 u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
1961 u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
1966 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in6));
1967 u6.ipv6_addr = ((struct sockaddr_in6 *) sender_addr)->sin6_addr;
1968 u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
1976 LOG (GNUNET_ERROR_TYPE_DEBUG,
1977 "Received message with %u bytes from peer `%s' at `%s'\n",
1978 (unsigned int) ntohs (msg->header.size), GNUNET_i2s (&msg->sender),
1979 GNUNET_a2s (sender_addr, sender_addr_len));
1981 struct GNUNET_HELLO_Address * address = GNUNET_HELLO_address_allocate(&msg->sender, "udp", arg, args);
1982 MEMDEBUG_add_alloc (address, GNUNET_HELLO_address_get_size(address), __LINE__);
1983 s = udp_plugin_get_session(plugin, address);
1984 MEMDEBUG_free (address, __LINE__);
1986 /* iterate over all embedded messages */
1988 si.sender = msg->sender;
1992 GNUNET_SERVER_mst_receive (plugin->mst, &si, (const char *) &msg[1],
1993 ntohs (msg->header.size) -
1994 sizeof (struct UDPMessage), GNUNET_YES, GNUNET_NO);
1996 if ( (0 == s->rc) && (GNUNET_YES == s->in_destroy))
2002 * Scan the heap for a receive context with the given address.
2004 * @param cls the 'struct FindReceiveContext'
2005 * @param node internal node of the heap
2006 * @param element value stored at the node (a 'struct ReceiveContext')
2007 * @param cost cost associated with the node
2008 * @return GNUNET_YES if we should continue to iterate,
2012 find_receive_context (void *cls, struct GNUNET_CONTAINER_HeapNode *node,
2013 void *element, GNUNET_CONTAINER_HeapCostType cost)
2015 struct FindReceiveContext *frc = cls;
2016 struct DefragContext *e = element;
2018 if ((frc->addr_len == e->addr_len) &&
2019 (0 == memcmp (frc->addr, e->src_addr, frc->addr_len)))
2029 * Process a defragmented message.
2031 * @param cls the 'struct ReceiveContext'
2032 * @param msg the message
2035 fragment_msg_proc (void *cls, const struct GNUNET_MessageHeader *msg)
2037 struct DefragContext *rc = cls;
2039 if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
2044 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2049 process_udp_message (rc->plugin, (const struct UDPMessage *) msg,
2050 rc->src_addr, rc->addr_len);
2054 struct LookupContext
2056 const struct sockaddr * addr;
2058 struct Session *res;
2065 lookup_session_by_addr_it (void *cls, const struct GNUNET_HashCode * key, void *value)
2067 struct LookupContext *l_ctx = cls;
2068 struct Session * s = value;
2070 if ((s->addrlen == l_ctx->addrlen) &&
2071 (0 == memcmp (s->sock_addr, l_ctx->addr, s->addrlen)))
2081 * Transmit an acknowledgement.
2083 * @param cls the 'struct ReceiveContext'
2084 * @param id message ID (unused)
2085 * @param msg ack to transmit
2088 ack_proc (void *cls, uint32_t id, const struct GNUNET_MessageHeader *msg)
2090 struct DefragContext *rc = cls;
2091 size_t msize = sizeof (struct UDP_ACK_Message) + ntohs (msg->size);
2092 struct UDP_ACK_Message *udp_ack;
2094 struct UDP_MessageWrapper *udpw;
2096 struct LookupContext l_ctx;
2098 l_ctx.addr = rc->src_addr;
2099 l_ctx.addrlen = rc->addr_len;
2101 GNUNET_CONTAINER_multihashmap_iterate (rc->plugin->sessions,
2102 &lookup_session_by_addr_it,
2109 if (s->flow_delay_for_other_peer.rel_value <= UINT32_MAX)
2110 delay = s->flow_delay_for_other_peer.rel_value;
2112 LOG (GNUNET_ERROR_TYPE_DEBUG,
2113 "Sending ACK to `%s' including delay of %u ms\n",
2114 GNUNET_a2s (rc->src_addr,
2115 (rc->src_addr->sa_family ==
2116 AF_INET) ? sizeof (struct sockaddr_in) : sizeof (struct
2119 udpw = MEMDEBUG_malloc (sizeof (struct UDP_MessageWrapper) + msize, __LINE__ );
2120 udpw->msg_size = msize;
2121 udpw->payload_size = 0;
2123 udpw->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
2124 udpw->msg_buf = (char *)&udpw[1];
2125 udpw->msg_type = MSG_ACK;
2126 udp_ack = (struct UDP_ACK_Message *) udpw->msg_buf;
2127 udp_ack->header.size = htons ((uint16_t) msize);
2128 udp_ack->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
2129 udp_ack->delay = htonl (delay);
2130 udp_ack->sender = *rc->plugin->env->my_identity;
2131 memcpy (&udp_ack[1], msg, ntohs (msg->size));
2132 enqueue (rc->plugin, udpw);
2137 read_process_msg (struct Plugin *plugin,
2138 const struct GNUNET_MessageHeader *msg,
2142 if (ntohs (msg->size) < sizeof (struct UDPMessage))
2144 GNUNET_break_op (0);
2147 process_udp_message (plugin, (const struct UDPMessage *) msg,
2148 (const struct sockaddr *) addr, fromlen);
2153 read_process_ack (struct Plugin *plugin,
2154 const struct GNUNET_MessageHeader *msg,
2158 const struct GNUNET_MessageHeader *ack;
2159 const struct UDP_ACK_Message *udp_ack;
2160 struct LookupContext l_ctx;
2162 struct GNUNET_TIME_Relative flow_delay;
2164 if (ntohs (msg->size) <
2165 sizeof (struct UDP_ACK_Message) + sizeof (struct GNUNET_MessageHeader))
2167 GNUNET_break_op (0);
2170 udp_ack = (const struct UDP_ACK_Message *) msg;
2171 l_ctx.addr = (const struct sockaddr *) addr;
2172 l_ctx.addrlen = fromlen;
2174 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions,
2175 &lookup_session_by_addr_it,
2179 if ((NULL == s) || (NULL == s->frag_ctx))
2184 flow_delay.rel_value = (uint64_t) ntohl (udp_ack->delay);
2185 LOG (GNUNET_ERROR_TYPE_DEBUG,
2186 "We received a sending delay of %llu\n",
2187 flow_delay.rel_value);
2188 s->flow_delay_from_other_peer =
2189 GNUNET_TIME_relative_to_absolute (flow_delay);
2191 ack = (const struct GNUNET_MessageHeader *) &udp_ack[1];
2192 if (ntohs (ack->size) !=
2193 ntohs (msg->size) - sizeof (struct UDP_ACK_Message))
2195 GNUNET_break_op (0);
2199 if (0 != memcmp (&l_ctx.res->target, &udp_ack->sender, sizeof (struct GNUNET_PeerIdentity)))
2201 if (GNUNET_OK != GNUNET_FRAGMENT_process_ack (s->frag_ctx->frag, ack))
2203 LOG (GNUNET_ERROR_TYPE_DEBUG,
2204 "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
2205 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2206 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2207 /* Expect more ACKs to arrive */
2211 LOG (GNUNET_ERROR_TYPE_DEBUG,
2212 "Message full ACK'ed\n",
2213 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
2214 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2216 /* Remove fragmented message after successful sending */
2217 fragmented_message_done (s->frag_ctx, GNUNET_OK);
2222 read_process_fragment (struct Plugin *plugin,
2223 const struct GNUNET_MessageHeader *msg,
2227 struct DefragContext *d_ctx;
2228 struct GNUNET_TIME_Absolute now;
2229 struct FindReceiveContext frc;
2232 frc.addr = (const struct sockaddr *) addr;
2233 frc.addr_len = fromlen;
2235 LOG (GNUNET_ERROR_TYPE_DEBUG, "UDP processes %u-byte fragment from `%s'\n",
2236 (unsigned int) ntohs (msg->size),
2237 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2238 /* Lookup existing receive context for this address */
2239 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
2240 &find_receive_context,
2242 now = GNUNET_TIME_absolute_get ();
2247 /* Create a new defragmentation context */
2248 d_ctx = MEMDEBUG_malloc (sizeof (struct DefragContext) + fromlen, __LINE__ );
2249 memcpy (&d_ctx[1], addr, fromlen);
2250 d_ctx->src_addr = (const struct sockaddr *) &d_ctx[1];
2251 d_ctx->addr_len = fromlen;
2252 d_ctx->plugin = plugin;
2254 GNUNET_DEFRAGMENT_context_create (plugin->env->stats, UDP_MTU,
2255 UDP_MAX_MESSAGES_IN_DEFRAG, d_ctx,
2256 &fragment_msg_proc, &ack_proc);
2258 GNUNET_CONTAINER_heap_insert (plugin->defrag_ctxs, d_ctx,
2259 (GNUNET_CONTAINER_HeapCostType)
2261 LOG (GNUNET_ERROR_TYPE_DEBUG,
2262 "Created new defragmentation context for %u-byte fragment from `%s'\n",
2263 (unsigned int) ntohs (msg->size),
2264 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2268 LOG (GNUNET_ERROR_TYPE_DEBUG,
2269 "Found existing defragmentation context for %u-byte fragment from `%s'\n",
2270 (unsigned int) ntohs (msg->size),
2271 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
2274 if (GNUNET_OK == GNUNET_DEFRAGMENT_process_fragment (d_ctx->defrag, msg))
2276 /* keep this 'rc' from expiring */
2277 GNUNET_CONTAINER_heap_update_cost (plugin->defrag_ctxs, d_ctx->hnode,
2278 (GNUNET_CONTAINER_HeapCostType)
2281 if (GNUNET_CONTAINER_heap_get_size (plugin->defrag_ctxs) >
2282 UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
2284 /* remove 'rc' that was inactive the longest */
2285 d_ctx = GNUNET_CONTAINER_heap_remove_root (plugin->defrag_ctxs);
2286 GNUNET_assert (NULL != d_ctx);
2287 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
2288 MEMDEBUG_free (d_ctx, __LINE__);
2294 * Read and process a message from the given socket.
2296 * @param plugin the overall plugin
2297 * @param rsock socket to read from
2300 udp_select_read (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *rsock)
2304 char buf[65536] GNUNET_ALIGN;
2306 const struct GNUNET_MessageHeader *msg;
2308 fromlen = sizeof (addr);
2309 memset (&addr, 0, sizeof (addr));
2310 size = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof (buf),
2311 (struct sockaddr *) &addr, &fromlen);
2313 /* On SOCK_DGRAM UDP sockets recvfrom might fail with a
2314 * WSAECONNRESET error to indicate that previous sendto() (yes, sendto!)
2315 * on this socket has failed.
2317 * WSAECONNRESET - The virtual circuit was reset by the remote side
2318 * executing a hard or abortive close. The application should close
2319 * the socket; it is no longer usable. On a UDP-datagram socket this
2320 * error indicates a previous send operation resulted in an ICMP Port
2321 * Unreachable message.
2323 if ( (-1 == size) && (ECONNRESET == errno) )
2328 LOG (GNUNET_ERROR_TYPE_DEBUG,
2329 "UDP failed to receive data: %s\n", STRERROR (errno));
2330 /* Connection failure or something. Not a protocol violation. */
2333 if (size < sizeof (struct GNUNET_MessageHeader))
2335 LOG (GNUNET_ERROR_TYPE_WARNING,
2336 "UDP got %u bytes, which is not enough for a GNUnet message header\n",
2337 (unsigned int) size);
2338 /* _MAY_ be a connection failure (got partial message) */
2339 /* But it _MAY_ also be that the other side uses non-GNUnet protocol. */
2340 GNUNET_break_op (0);
2343 msg = (const struct GNUNET_MessageHeader *) buf;
2345 LOG (GNUNET_ERROR_TYPE_DEBUG,
2346 "UDP received %u-byte message from `%s' type %i\n", (unsigned int) size,
2347 GNUNET_a2s ((const struct sockaddr *) addr, fromlen), ntohs (msg->type));
2349 if (size != ntohs (msg->size))
2351 GNUNET_break_op (0);
2355 GNUNET_STATISTICS_update (plugin->env->stats,
2356 "# UDP, total, bytes, received",
2359 switch (ntohs (msg->type))
2361 case GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON:
2362 udp_broadcast_receive (plugin, &buf, size, addr, fromlen);
2365 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
2366 read_process_msg (plugin, msg, addr, fromlen);
2369 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
2370 read_process_ack (plugin, msg, addr, fromlen);
2373 case GNUNET_MESSAGE_TYPE_FRAGMENT:
2374 read_process_fragment (plugin, msg, addr, fromlen);
2378 GNUNET_break_op (0);
2383 static struct UDP_MessageWrapper *
2384 remove_timeout_messages_and_select (struct UDP_MessageWrapper *head,
2385 struct GNUNET_NETWORK_Handle *sock)
2387 struct UDP_MessageWrapper *udpw = NULL;
2388 struct GNUNET_TIME_Relative remaining;
2391 while (udpw != NULL)
2393 /* Find messages with timeout */
2394 remaining = GNUNET_TIME_absolute_get_remaining (udpw->timeout);
2395 if (GNUNET_TIME_UNIT_ZERO.rel_value == remaining.rel_value)
2397 /* Message timed out */
2398 switch (udpw->msg_type) {
2399 case MSG_UNFRAGMENTED:
2400 GNUNET_STATISTICS_update (plugin->env->stats,
2401 "# UDP, total, bytes, sent, timeout",
2402 udpw->msg_size, GNUNET_NO);
2403 GNUNET_STATISTICS_update (plugin->env->stats,
2404 "# UDP, total, messages, sent, timeout",
2406 GNUNET_STATISTICS_update (plugin->env->stats,
2407 "# UDP, unfragmented msgs, messages, sent, timeout",
2409 GNUNET_STATISTICS_update (plugin->env->stats,
2410 "# UDP, unfragmented msgs, bytes, sent, timeout",
2411 udpw->payload_size, GNUNET_NO);
2412 /* Not fragmented message */
2413 LOG (GNUNET_ERROR_TYPE_DEBUG,
2414 "Message for peer `%s' with size %u timed out\n",
2415 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2416 call_continuation (udpw, GNUNET_SYSERR);
2417 /* Remove message */
2418 dequeue (plugin, udpw);
2419 MEMDEBUG_free (udpw, __LINE__);
2421 case MSG_FRAGMENTED:
2422 /* Fragmented message */
2423 GNUNET_STATISTICS_update (plugin->env->stats,
2424 "# UDP, total, bytes, sent, timeout",
2425 udpw->frag_ctx->on_wire_size, GNUNET_NO);
2426 GNUNET_STATISTICS_update (plugin->env->stats,
2427 "# UDP, total, messages, sent, timeout",
2429 call_continuation (udpw, GNUNET_SYSERR);
2430 LOG (GNUNET_ERROR_TYPE_DEBUG,
2431 "Fragment for message for peer `%s' with size %u timed out\n",
2432 GNUNET_i2s(&udpw->session->target), udpw->frag_ctx->payload_size);
2435 GNUNET_STATISTICS_update (plugin->env->stats,
2436 "# UDP, fragmented msgs, messages, sent, timeout",
2438 GNUNET_STATISTICS_update (plugin->env->stats,
2439 "# UDP, fragmented msgs, bytes, sent, timeout",
2440 udpw->frag_ctx->payload_size, GNUNET_NO);
2441 /* Remove fragmented message due to timeout */
2442 fragmented_message_done (udpw->frag_ctx, GNUNET_SYSERR);
2445 GNUNET_STATISTICS_update (plugin->env->stats,
2446 "# UDP, total, bytes, sent, timeout",
2447 udpw->msg_size, GNUNET_NO);
2448 GNUNET_STATISTICS_update (plugin->env->stats,
2449 "# UDP, total, messages, sent, timeout",
2451 LOG (GNUNET_ERROR_TYPE_DEBUG,
2452 "ACK Message for peer `%s' with size %u timed out\n",
2453 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2454 call_continuation (udpw, GNUNET_SYSERR);
2455 dequeue (plugin, udpw);
2456 MEMDEBUG_free (udpw, __LINE__);
2461 if (sock == plugin->sockv4)
2462 udpw = plugin->ipv4_queue_head;
2463 else if (sock == plugin->sockv6)
2464 udpw = plugin->ipv6_queue_head;
2467 GNUNET_break (0); /* should never happen */
2470 GNUNET_STATISTICS_update (plugin->env->stats,
2471 "# messages dismissed due to timeout",
2476 /* Message did not time out, check flow delay */
2477 remaining = GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer);
2478 if (GNUNET_TIME_UNIT_ZERO.rel_value == remaining.rel_value)
2480 /* this message is not delayed */
2481 LOG (GNUNET_ERROR_TYPE_DEBUG,
2482 "Message for peer `%s' (%u bytes) is not delayed \n",
2483 GNUNET_i2s(&udpw->session->target), udpw->payload_size);
2484 break; /* Found message to send, break */
2488 /* Message is delayed, try next */
2489 LOG (GNUNET_ERROR_TYPE_DEBUG,
2490 "Message for peer `%s' (%u bytes) is delayed for %llu \n",
2491 GNUNET_i2s(&udpw->session->target), udpw->payload_size, remaining.rel_value);
2501 analyze_send_error (struct Plugin *plugin,
2502 const struct sockaddr * sa,
2506 static int network_down_error;
2507 struct GNUNET_ATS_Information type;
2509 type = plugin->env->get_address_type (plugin->env->cls,sa, slen);
2510 if (((GNUNET_ATS_NET_LAN == ntohl(type.value)) || (GNUNET_ATS_NET_WAN == ntohl(type.value))) &&
2511 ((ENETUNREACH == errno) || (ENETDOWN == errno)))
2513 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in)))
2515 /* IPv4: "Network unreachable" or "Network down"
2517 * This indicates we do not have connectivity
2519 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2520 _("UDP could not transmit message to `%s': "
2521 "Network seems down, please check your network configuration\n"),
2522 GNUNET_a2s (sa, slen));
2524 if ((network_down_error == GNUNET_NO) && (slen == sizeof (struct sockaddr_in6)))
2526 /* IPv6: "Network unreachable" or "Network down"
2528 * This indicates that this system is IPv6 enabled, but does not
2529 * have a valid global IPv6 address assigned or we do not have
2533 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2534 _("UDP could not transmit message to `%s': "
2535 "Please check your network configuration and disable IPv6 if your "
2536 "connection does not have a global IPv6 address\n"),
2537 GNUNET_a2s (sa, slen));
2542 LOG (GNUNET_ERROR_TYPE_WARNING,
2543 "UDP could not transmit message to `%s': `%s'\n",
2544 GNUNET_a2s (sa, slen), STRERROR (error));
2549 udp_select_send (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *sock)
2551 const struct sockaddr * sa;
2555 struct UDP_MessageWrapper *udpw = NULL;
2557 /* Find message to send */
2558 udpw = remove_timeout_messages_and_select ((sock == plugin->sockv4) ? plugin->ipv4_queue_head : plugin->ipv6_queue_head,
2561 return 0; /* No message to send */
2563 sa = udpw->session->sock_addr;
2564 slen = udpw->session->addrlen;
2566 sent = GNUNET_NETWORK_socket_sendto (sock, udpw->msg_buf, udpw->msg_size, sa, slen);
2568 if (GNUNET_SYSERR == sent)
2571 analyze_send_error (plugin, sa, slen, errno);
2572 call_continuation(udpw, GNUNET_SYSERR);
2573 GNUNET_STATISTICS_update (plugin->env->stats,
2574 "# UDP, total, bytes, sent, failure",
2576 GNUNET_STATISTICS_update (plugin->env->stats,
2577 "# UDP, total, messages, sent, failure",
2583 LOG (GNUNET_ERROR_TYPE_DEBUG,
2584 "UDP transmitted %u-byte message to `%s' `%s' (%d: %s)\n",
2585 (unsigned int) (udpw->msg_size), GNUNET_i2s(&udpw->session->target) ,GNUNET_a2s (sa, slen), (int) sent,
2586 (sent < 0) ? STRERROR (errno) : "ok");
2587 GNUNET_STATISTICS_update (plugin->env->stats,
2588 "# UDP, total, bytes, sent, success",
2590 GNUNET_STATISTICS_update (plugin->env->stats,
2591 "# UDP, total, messages, sent, success",
2593 if (NULL != udpw->frag_ctx)
2594 udpw->frag_ctx->on_wire_size += udpw->msg_size;
2595 call_continuation (udpw, GNUNET_OK);
2597 dequeue (plugin, udpw);
2598 MEMDEBUG_free (udpw, __LINE__);
2606 * We have been notified that our readset has something to read. We don't
2607 * know which socket needs to be read, so we have to check each one
2608 * Then reschedule this function to be called again once more is available.
2610 * @param cls the plugin handle
2611 * @param tc the scheduling context (for rescheduling this function again)
2614 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2616 struct Plugin *plugin = cls;
2618 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
2619 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2621 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
2622 (NULL != plugin->sockv4) &&
2623 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv4)) )
2624 udp_select_read (plugin, plugin->sockv4);
2625 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2626 (NULL != plugin->sockv4) &&
2627 (NULL != plugin->ipv4_queue_head) &&
2628 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv4)) )
2629 udp_select_send (plugin, plugin->sockv4);
2630 schedule_select (plugin);
2635 * We have been notified that our readset has something to read. We don't
2636 * know which socket needs to be read, so we have to check each one
2637 * Then reschedule this function to be called again once more is available.
2639 * @param cls the plugin handle
2640 * @param tc the scheduling context (for rescheduling this function again)
2643 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2645 struct Plugin *plugin = cls;
2647 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2648 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2650 if ( ((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0) &&
2651 (NULL != plugin->sockv6) &&
2652 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv6)) )
2653 udp_select_read (plugin, plugin->sockv6);
2654 if ( (0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
2655 (NULL != plugin->sockv6) && (plugin->ipv6_queue_head != NULL) &&
2656 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv6)) )
2657 udp_select_send (plugin, plugin->sockv6);
2658 schedule_select (plugin);
2663 setup_sockets (struct Plugin *plugin, struct sockaddr_in6 *serverAddrv6, struct sockaddr_in *serverAddrv4)
2666 int sockets_created = 0;
2667 struct sockaddr *serverAddr;
2668 struct sockaddr *addrs[2];
2669 socklen_t addrlens[2];
2672 /* Create IPv6 socket */
2673 if (plugin->enable_ipv6 == GNUNET_YES)
2675 plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
2676 if (NULL == plugin->sockv6)
2678 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv6 since it is not supported on this system!\n");
2679 plugin->enable_ipv6 = GNUNET_NO;
2683 #if HAVE_SOCKADDR_IN_SIN_LEN
2684 serverAddrv6->sin6_len = sizeof (serverAddrv6);
2686 serverAddrv6->sin6_family = AF_INET6;
2687 serverAddrv6->sin6_addr = in6addr_any;
2688 serverAddrv6->sin6_port = htons (plugin->port);
2689 addrlen = sizeof (struct sockaddr_in6);
2690 serverAddr = (struct sockaddr *) serverAddrv6;
2691 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv6 port %d\n",
2692 ntohs (serverAddrv6->sin6_port));
2694 while (GNUNET_NETWORK_socket_bind (plugin->sockv6, serverAddr, addrlen) !=
2697 serverAddrv6->sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000); /* Find a good, non-root port */
2698 LOG (GNUNET_ERROR_TYPE_DEBUG,
2699 "IPv6 Binding failed, trying new port %d\n",
2700 ntohs (serverAddrv6->sin6_port));
2704 GNUNET_NETWORK_socket_close (plugin->sockv6);
2705 plugin->sockv6 = NULL;
2709 if (plugin->sockv6 != NULL)
2711 LOG (GNUNET_ERROR_TYPE_DEBUG,
2712 "IPv6 socket created on port %d\n",
2713 ntohs (serverAddrv6->sin6_port));
2714 addrs[sockets_created] = (struct sockaddr *) serverAddrv6;
2715 addrlens[sockets_created] = sizeof (struct sockaddr_in6);
2721 /* Create IPv4 socket */
2722 plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
2723 if (NULL == plugin->sockv4)
2725 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2729 #if HAVE_SOCKADDR_IN_SIN_LEN
2730 serverAddrv4->sin_len = sizeof (serverAddrv4);
2732 serverAddrv4->sin_family = AF_INET;
2733 serverAddrv4->sin_addr.s_addr = INADDR_ANY;
2734 serverAddrv4->sin_port = htons (plugin->port);
2735 addrlen = sizeof (struct sockaddr_in);
2736 serverAddr = (struct sockaddr *) serverAddrv4;
2738 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv4 port %d\n",
2739 ntohs (serverAddrv4->sin_port));
2741 while (GNUNET_NETWORK_socket_bind (plugin->sockv4, serverAddr, addrlen) !=
2744 serverAddrv4->sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000); /* Find a good, non-root port */
2745 LOG (GNUNET_ERROR_TYPE_DEBUG, "IPv4 Binding failed, trying new port %d\n",
2746 ntohs (serverAddrv4->sin_port));
2750 GNUNET_NETWORK_socket_close (plugin->sockv4);
2751 plugin->sockv4 = NULL;
2755 if (plugin->sockv4 != NULL)
2757 addrs[sockets_created] = (struct sockaddr *) serverAddrv4;
2758 addrlens[sockets_created] = sizeof (struct sockaddr_in);
2763 /* Create file descriptors */
2764 plugin->rs_v4 = GNUNET_NETWORK_fdset_create ();
2765 plugin->ws_v4 = GNUNET_NETWORK_fdset_create ();
2766 GNUNET_NETWORK_fdset_zero (plugin->rs_v4);
2767 GNUNET_NETWORK_fdset_zero (plugin->ws_v4);
2768 if (NULL != plugin->sockv4)
2770 GNUNET_NETWORK_fdset_set (plugin->rs_v4, plugin->sockv4);
2771 GNUNET_NETWORK_fdset_set (plugin->ws_v4, plugin->sockv4);
2774 if (0 == sockets_created)
2775 LOG (GNUNET_ERROR_TYPE_WARNING, _("Failed to open UDP sockets\n"));
2776 if (plugin->enable_ipv6 == GNUNET_YES)
2778 plugin->rs_v6 = GNUNET_NETWORK_fdset_create ();
2779 plugin->ws_v6 = GNUNET_NETWORK_fdset_create ();
2780 GNUNET_NETWORK_fdset_zero (plugin->rs_v6);
2781 GNUNET_NETWORK_fdset_zero (plugin->ws_v6);
2782 if (NULL != plugin->sockv6)
2784 GNUNET_NETWORK_fdset_set (plugin->rs_v6, plugin->sockv6);
2785 GNUNET_NETWORK_fdset_set (plugin->ws_v6, plugin->sockv6);
2788 schedule_select (plugin);
2789 plugin->nat = GNUNET_NAT_register (plugin->env->cfg,
2790 GNUNET_NO, plugin->port,
2792 (const struct sockaddr **) addrs, addrlens,
2793 &udp_nat_port_map_callback, NULL, plugin);
2795 return sockets_created;
2800 * The exported method. Makes the core api available via a global and
2801 * returns the udp transport API.
2803 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
2804 * @return our 'struct GNUNET_TRANSPORT_PluginFunctions'
2807 libgnunet_plugin_transport_udp_init (void *cls)
2809 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2810 struct GNUNET_TRANSPORT_PluginFunctions *api;
2812 unsigned long long port;
2813 unsigned long long aport;
2814 unsigned long long broadcast;
2815 unsigned long long udp_max_bps;
2816 unsigned long long enable_v6;
2817 char * bind4_address;
2818 char * bind6_address;
2819 char * fancy_interval;
2820 struct GNUNET_TIME_Relative interval;
2821 struct sockaddr_in serverAddrv4;
2822 struct sockaddr_in6 serverAddrv6;
2825 if (NULL == env->receive)
2827 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
2828 initialze the plugin or the API */
2829 api = MEMDEBUG_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions), __LINE__ );
2831 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
2832 api->address_to_string = &udp_address_to_string;
2833 api->string_to_address = &udp_string_to_address;
2837 GNUNET_assert( NULL != env->stats);
2839 /* Get port number */
2841 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp", "PORT",
2845 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
2846 "ADVERTISED_PORT", &aport))
2850 LOG (GNUNET_ERROR_TYPE_WARNING,
2851 _("Given `%s' option is out of range: %llu > %u\n"), "PORT", port,
2858 GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "nat",
2861 enable_v6 = GNUNET_NO;
2864 enable_v6 = GNUNET_YES;
2867 memset (&serverAddrv6, 0, sizeof (serverAddrv6));
2868 memset (&serverAddrv4, 0, sizeof (serverAddrv4));
2871 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
2872 "BINDTO", &bind4_address))
2874 LOG (GNUNET_ERROR_TYPE_DEBUG,
2875 "Binding udp plugin to specific address: `%s'\n",
2877 if (1 != inet_pton (AF_INET, bind4_address, &serverAddrv4.sin_addr))
2879 MEMDEBUG_free (bind4_address, __LINE__);
2885 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
2886 "BINDTO6", &bind6_address))
2888 LOG (GNUNET_ERROR_TYPE_DEBUG,
2889 "Binding udp plugin to specific address: `%s'\n",
2892 inet_pton (AF_INET6, bind6_address, &serverAddrv6.sin6_addr))
2894 LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid IPv6 address: `%s'\n"),
2896 MEMDEBUG_free_non_null (bind4_address, __LINE__);
2897 MEMDEBUG_free (bind6_address, __LINE__);
2902 /* Enable neighbour discovery */
2903 broadcast = GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "transport-udp",
2905 if (broadcast == GNUNET_SYSERR)
2906 broadcast = GNUNET_NO;
2908 if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
2909 "BROADCAST_INTERVAL", &fancy_interval))
2911 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
2915 MEMDEBUG_add_alloc (fancy_interval, strlen (fancy_interval)+ 1, __LINE__);
2916 if (GNUNET_SYSERR == GNUNET_STRINGS_fancy_time_to_relative(fancy_interval, &interval))
2918 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30);
2920 MEMDEBUG_free (fancy_interval, __LINE__);
2923 /* Maximum datarate */
2924 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
2925 "MAX_BPS", &udp_max_bps))
2927 udp_max_bps = 1024 * 1024 * 50; /* 50 MB/s == infinity for practical purposes */
2930 p = MEMDEBUG_malloc (sizeof (struct Plugin), __LINE__ );
2931 api = MEMDEBUG_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions), __LINE__ );
2933 GNUNET_BANDWIDTH_tracker_init (&p->tracker,
2934 GNUNET_BANDWIDTH_value_init ((uint32_t)udp_max_bps), 30);
2935 p->sessions = GNUNET_CONTAINER_multihashmap_create (10, GNUNET_NO);
2936 p->defrag_ctxs = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
2937 p->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages, p);
2940 p->broadcast_interval = interval;
2941 p->enable_ipv6 = enable_v6;
2948 api->disconnect = &udp_disconnect;
2949 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
2950 api->address_to_string = &udp_address_to_string;
2951 api->string_to_address = &udp_string_to_address;
2952 api->check_address = &udp_plugin_check_address;
2953 api->get_session = &udp_plugin_get_session;
2954 api->send = &udp_plugin_send;
2956 LOG (GNUNET_ERROR_TYPE_DEBUG, "Setting up sockets\n");
2957 res = setup_sockets (p, &serverAddrv6, &serverAddrv4);
2958 if ((res == 0) || ((p->sockv4 == NULL) && (p->sockv6 == NULL)))
2960 LOG (GNUNET_ERROR_TYPE_ERROR, "Failed to create network sockets, plugin failed\n");
2961 MEMDEBUG_free (p, __LINE__);
2962 MEMDEBUG_free (api, __LINE__);
2966 if (broadcast == GNUNET_YES)
2968 LOG (GNUNET_ERROR_TYPE_DEBUG, "Starting broadcasting\n");
2969 setup_broadcast (p, &serverAddrv6, &serverAddrv4);
2972 MEMDEBUG_free_non_null (bind4_address, __LINE__);
2973 MEMDEBUG_free_non_null (bind6_address, __LINE__);
2979 heap_cleanup_iterator (void *cls,
2980 struct GNUNET_CONTAINER_HeapNode *
2981 node, void *element,
2982 GNUNET_CONTAINER_HeapCostType
2985 struct DefragContext * d_ctx = element;
2987 GNUNET_CONTAINER_heap_remove_node (node);
2988 GNUNET_DEFRAGMENT_context_destroy(d_ctx->defrag);
2989 MEMDEBUG_free (d_ctx, __LINE__);
2996 * The exported method. Makes the core api available via a global and
2997 * returns the udp transport API.
2999 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
3003 libgnunet_plugin_transport_udp_done (void *cls)
3005 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
3006 struct Plugin *plugin = api->cls;
3010 MEMDEBUG_free (api, __LINE__);
3014 stop_broadcast (plugin);
3015 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
3017 GNUNET_SCHEDULER_cancel (plugin->select_task);
3018 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
3020 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK)
3022 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
3023 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
3026 /* Closing sockets */
3027 if (plugin->sockv4 != NULL)
3029 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
3030 plugin->sockv4 = NULL;
3032 GNUNET_NETWORK_fdset_destroy (plugin->rs_v4);
3033 GNUNET_NETWORK_fdset_destroy (plugin->ws_v4);
3035 if (plugin->sockv6 != NULL)
3037 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
3038 plugin->sockv6 = NULL;
3040 GNUNET_NETWORK_fdset_destroy (plugin->rs_v6);
3041 GNUNET_NETWORK_fdset_destroy (plugin->ws_v6);
3044 GNUNET_NAT_unregister (plugin->nat);
3046 if (plugin->defrag_ctxs != NULL)
3048 GNUNET_CONTAINER_heap_iterate(plugin->defrag_ctxs,
3049 heap_cleanup_iterator, NULL);
3050 GNUNET_CONTAINER_heap_destroy(plugin->defrag_ctxs);
3051 plugin->defrag_ctxs = NULL;
3053 if (plugin->mst != NULL)
3055 GNUNET_SERVER_mst_destroy(plugin->mst);
3059 /* Clean up leftover messages */
3060 struct UDP_MessageWrapper * udpw;
3061 udpw = plugin->ipv4_queue_head;
3062 while (udpw != NULL)
3064 struct UDP_MessageWrapper *tmp = udpw->next;
3065 dequeue (plugin, udpw);
3066 call_continuation(udpw, GNUNET_SYSERR);
3067 MEMDEBUG_free (udpw, __LINE__);
3071 udpw = plugin->ipv6_queue_head;
3072 while (udpw != NULL)
3074 struct UDP_MessageWrapper *tmp = udpw->next;
3075 dequeue (plugin, udpw);
3076 call_continuation(udpw, GNUNET_SYSERR);
3077 MEMDEBUG_free (udpw, __LINE__);
3082 /* Clean up sessions */
3083 LOG (GNUNET_ERROR_TYPE_DEBUG,
3084 "Cleaning up sessions\n");
3085 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions, &disconnect_and_free_it, plugin);
3086 GNUNET_CONTAINER_multihashmap_destroy (plugin->sessions);
3089 MEMDEBUG_free (plugin, __LINE__);
3090 MEMDEBUG_free (api, __LINE__);
3092 struct Allocation *allocation;
3093 while (NULL != ahead)
3096 GNUNET_CONTAINER_DLL_remove (ahead, atail, allocation);
3097 GNUNET_free (allocation);
3099 struct Allocator *allocator;
3100 while (NULL != aehead)
3103 GNUNET_CONTAINER_DLL_remove (aehead, aetail, allocator);
3104 GNUNET_free (allocator);
3111 /* end of plugin_transport_udp.c */