2 This file is part of GNUnet
3 Copyright (C) 2010-2015 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__)
45 #define UDP_SESSION_TIME_OUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 60)
48 * Number of messages we can defragment in parallel. We only really
49 * defragment 1 message at a time, but if messages get re-ordered, we
50 * may want to keep knowledge about the previous message to avoid
51 * discarding the current message in favor of a single fragment of a
52 * previous message. 3 should be good since we don't expect massive
53 * message reorderings with UDP.
55 #define UDP_MAX_MESSAGES_IN_DEFRAG 3
58 * We keep a defragmentation queue per sender address. How many
59 * sender addresses do we support at the same time? Memory consumption
60 * is roughly a factor of 32k * UDP_MAX_MESSAGES_IN_DEFRAG times this
61 * value. (So 128 corresponds to 12 MB and should suffice for
62 * connecting to roughly 128 peers via UDP).
64 #define UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG 128
68 * Closure for #append_port().
70 struct PrettyPrinterContext
75 struct PrettyPrinterContext *next;
80 struct PrettyPrinterContext *prev;
85 struct Plugin *plugin;
90 struct GNUNET_RESOLVER_RequestHandle *resolver_handle;
93 * Function to call with the result.
95 GNUNET_TRANSPORT_AddressStringCallback asc;
105 struct GNUNET_SCHEDULER_Task *timeout_task;
108 * Is this an IPv6 address?
118 * Port to add after the IP address.
126 * Session with another peer.
131 * Which peer is this session for?
133 struct GNUNET_PeerIdentity target;
136 * Plugin this session belongs to.
138 struct Plugin *plugin;
141 * Context for dealing with fragments.
143 struct UDP_FragmentationContext *frag_ctx;
146 * Desired delay for next sending we send to other peer
148 struct GNUNET_TIME_Relative flow_delay_for_other_peer;
151 * Desired delay for next sending we received from other peer
153 struct GNUNET_TIME_Absolute flow_delay_from_other_peer;
156 * Session timeout task
158 struct GNUNET_SCHEDULER_Task *timeout_task;
161 * When does this session time out?
163 struct GNUNET_TIME_Absolute timeout;
166 * expected delay for ACKs
168 struct GNUNET_TIME_Relative last_expected_ack_delay;
171 * desired delay between UDP messages
173 struct GNUNET_TIME_Relative last_expected_msg_delay;
178 struct GNUNET_HELLO_Address *address;
181 * Number of bytes waiting for transmission to this peer.
183 unsigned long long bytes_in_queue;
186 * Number of messages waiting for transmission to this peer.
188 unsigned int msgs_in_queue;
191 * Reference counter to indicate that this session is
192 * currently being used and must not be destroyed;
193 * setting @e in_destroy will destroy it as soon as
199 * Network type of the address.
201 enum GNUNET_ATS_Network_Type scope;
204 * Is this session about to be destroyed (sometimes we cannot
205 * destroy a session immediately as below us on the stack
206 * there might be code that still uses it; in this case,
207 * @e rc is non-zero).
214 * Closure for #process_inbound_tokenized_messages().
216 struct SourceInformation
221 struct GNUNET_PeerIdentity sender;
224 * Associated session.
226 struct Session *session;
231 * Closure for #find_receive_context().
233 struct FindReceiveContext
236 * Where to store the result.
238 struct DefragContext *rc;
241 * Session associated with this context.
243 struct Session *session;
248 const union UdpAddress *udp_addr;
251 * Number of bytes in @e udp_addr.
258 * Data structure to track defragmentation contexts based
259 * on the source of the UDP traffic.
265 * Defragmentation context.
267 struct GNUNET_DEFRAGMENT_Context *defrag;
270 * Reference to master plugin struct.
272 struct Plugin *plugin;
275 * Node in the defrag heap.
277 struct GNUNET_CONTAINER_HeapNode *hnode;
280 * Who's message(s) are we defragmenting here?
281 * Only initialized once we succeeded and
282 * @e have_sender is set.
284 struct GNUNET_PeerIdentity sender;
287 * Source address this receive context is for (allocated at the
288 * end of the struct).
290 const union UdpAddress *udp_addr;
293 * Length of @e udp_addr.
298 * Network type the address belongs to.
300 enum GNUNET_ATS_Network_Type network_type;
303 * Has the @e sender field been initialized yet?
310 * Context to send fragmented messages
312 struct UDP_FragmentationContext
315 * Next in linked list
317 struct UDP_FragmentationContext *next;
320 * Previous in linked list
322 struct UDP_FragmentationContext *prev;
327 struct Plugin *plugin;
330 * Handle for GNUNET_FRAGMENT context
332 struct GNUNET_FRAGMENT_Context *frag;
335 * The session this fragmentation context belongs to
337 struct Session *session;
340 * Function to call upon completion of the transmission.
342 GNUNET_TRANSPORT_TransmitContinuation cont;
345 * Closure for @e cont.
352 struct GNUNET_TIME_Absolute timeout;
355 * Payload size of original unfragmented message
360 * Bytes used to send all fragments on wire including UDP overhead
367 unsigned int fragments_used;
373 * Message types included in a `struct UDP_MessageWrapper`
378 * Uninitialized (error)
383 * Fragment of a message.
385 UMT_MSG_FRAGMENTED = 1,
390 UMT_MSG_FRAGMENTED_COMPLETE = 2,
393 * Unfragmented message.
395 UMT_MSG_UNFRAGMENTED = 3,
398 * Receipt confirmation.
406 * Information we track for each message in the queue.
408 struct UDP_MessageWrapper
411 * Session this message belongs to
413 struct Session *session;
419 struct UDP_MessageWrapper *prev;
425 struct UDP_MessageWrapper *next;
428 * Message with size msg_size including UDP specific overhead
433 * Function to call upon completion of the transmission.
435 GNUNET_TRANSPORT_TransmitContinuation cont;
438 * Closure for @e cont.
443 * Fragmentation context
444 * frag_ctx == NULL if transport <= MTU
445 * frag_ctx != NULL if transport > MTU
447 struct UDP_FragmentationContext *frag_ctx;
452 struct GNUNET_TIME_Absolute timeout;
455 * Size of UDP message to send including UDP specific overhead
460 * Payload size of original message
467 enum UDP_MessageType msg_type;
473 * UDP ACK Message-Packet header.
475 struct UDP_ACK_Message
480 struct GNUNET_MessageHeader header;
483 * Desired delay for flow control
488 * What is the identity of the sender
490 struct GNUNET_PeerIdentity sender;
496 * If a session monitor is attached, notify it about the new
499 * @param plugin our plugin
500 * @param session session that changed state
501 * @param state new state of the session
504 notify_session_monitor (struct Plugin *plugin,
505 struct Session *session,
506 enum GNUNET_TRANSPORT_SessionState state)
508 struct GNUNET_TRANSPORT_SessionInfo info;
510 if (NULL == plugin->sic)
512 memset (&info, 0, sizeof (info));
514 info.is_inbound = GNUNET_SYSERR; /* hard to say */
515 info.num_msg_pending = session->msgs_in_queue;
516 info.num_bytes_pending = session->bytes_in_queue;
517 /* info.receive_delay remains zero as this is not supported by UDP
518 (cannot selectively not receive from 'some' peer while continuing
519 to receive from others) */
520 info.session_timeout = session->timeout;
521 info.address = session->address;
522 plugin->sic (plugin->sic_cls,
529 * We have been notified that our readset has something to read. We don't
530 * know which socket needs to be read, so we have to check each one
531 * Then reschedule this function to be called again once more is available.
533 * @param cls the plugin handle
534 * @param tc the scheduling context (for rescheduling this function again)
537 udp_plugin_select (void *cls,
538 const struct GNUNET_SCHEDULER_TaskContext *tc);
542 * We have been notified that our readset has something to read. We don't
543 * know which socket needs to be read, so we have to check each one
544 * Then reschedule this function to be called again once more is available.
546 * @param cls the plugin handle
547 * @param tc the scheduling context (for rescheduling this function again)
550 udp_plugin_select_v6 (void *cls,
551 const struct GNUNET_SCHEDULER_TaskContext *tc);
555 * (re)schedule select tasks for this plugin.
557 * @param plugin plugin to reschedule
560 schedule_select (struct Plugin *plugin)
562 struct GNUNET_TIME_Relative min_delay;
563 struct UDP_MessageWrapper *udpw;
565 if ((GNUNET_YES == plugin->enable_ipv4) && (NULL != plugin->sockv4))
567 /* Find a message ready to send:
568 * Flow delay from other peer is expired or not set (0) */
569 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
570 for (udpw = plugin->ipv4_queue_head; NULL != udpw; udpw = udpw->next)
571 min_delay = GNUNET_TIME_relative_min (min_delay,
572 GNUNET_TIME_absolute_get_remaining (
573 udpw->session->flow_delay_from_other_peer));
575 if (plugin->select_task != NULL )
576 GNUNET_SCHEDULER_cancel (plugin->select_task);
579 * - write active set if message is ready
580 * - timeout minimum delay */
581 plugin->select_task = GNUNET_SCHEDULER_add_select (
582 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
583 (0 == min_delay.rel_value_us) ?
584 GNUNET_TIME_UNIT_FOREVER_REL : min_delay, plugin->rs_v4,
585 (0 == min_delay.rel_value_us) ? plugin->ws_v4 : NULL,
586 &udp_plugin_select, plugin);
588 if ((GNUNET_YES == plugin->enable_ipv6) && (NULL != plugin->sockv6))
590 min_delay = GNUNET_TIME_UNIT_FOREVER_REL;
591 for (udpw = plugin->ipv6_queue_head; NULL != udpw; udpw = udpw->next)
592 min_delay = GNUNET_TIME_relative_min (min_delay,
593 GNUNET_TIME_absolute_get_remaining (
594 udpw->session->flow_delay_from_other_peer));
596 if (NULL != plugin->select_task_v6)
597 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
598 plugin->select_task_v6 = GNUNET_SCHEDULER_add_select (
599 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
600 (0 == min_delay.rel_value_us) ?
601 GNUNET_TIME_UNIT_FOREVER_REL : min_delay, plugin->rs_v6,
602 (0 == min_delay.rel_value_us) ? plugin->ws_v6 : NULL,
603 &udp_plugin_select_v6, plugin);
609 * Function called for a quick conversion of the binary address to
610 * a numeric address. Note that the caller must not free the
611 * address and that the next call to this function is allowed
612 * to override the address again.
615 * @param addr binary address (a `union UdpAddress`)
616 * @param addrlen length of the @a addr
617 * @return string representing the same address
620 udp_address_to_string (void *cls,
624 static char rbuf[INET6_ADDRSTRLEN + 10];
625 char buf[INET6_ADDRSTRLEN];
629 const struct IPv4UdpAddress *t4;
630 const struct IPv6UdpAddress *t6;
635 if ((NULL != addr) && (addrlen == sizeof(struct IPv6UdpAddress)))
639 options = ntohl (t6->options);
640 port = ntohs (t6->u6_port);
641 memcpy (&a6, &t6->ipv6_addr, sizeof(a6));
644 else if ((NULL != addr) && (addrlen == sizeof(struct IPv4UdpAddress)))
648 options = ntohl (t4->options);
649 port = ntohs (t4->u4_port);
650 memcpy (&a4, &t4->ipv4_addr, sizeof(a4));
657 inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
659 GNUNET_snprintf (rbuf, sizeof(rbuf),
672 * Function called to convert a string address to
675 * @param cls closure (`struct Plugin *`)
676 * @param addr string address
677 * @param addrlen length of the address
678 * @param buf location to store the buffer
679 * @param added location to store the number of bytes in the buffer.
680 * If the function returns #GNUNET_SYSERR, its contents are undefined.
681 * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
684 udp_string_to_address (void *cls,
690 struct sockaddr_storage socket_address;
696 /* Format tcp.options.address:port */
701 if ((NULL == addr) || (addrlen == 0))
704 return GNUNET_SYSERR;
706 if ('\0' != addr[addrlen - 1])
709 return GNUNET_SYSERR;
711 if (strlen (addr) != addrlen - 1)
714 return GNUNET_SYSERR;
716 plugin = GNUNET_strdup (addr);
717 optionstr = strchr (plugin, '.');
718 if (NULL == optionstr)
722 return GNUNET_SYSERR;
726 options = atol (optionstr);
727 address = strchr (optionstr, '.');
732 return GNUNET_SYSERR;
738 GNUNET_STRINGS_to_address_ip (address, strlen (address),
743 return GNUNET_SYSERR;
748 switch (socket_address.ss_family)
752 struct IPv4UdpAddress *u4;
753 struct sockaddr_in *in4 = (struct sockaddr_in *) &socket_address;
754 u4 = GNUNET_new (struct IPv4UdpAddress);
755 u4->options = htonl (options);
756 u4->ipv4_addr = in4->sin_addr.s_addr;
757 u4->u4_port = in4->sin_port;
759 *added = sizeof(struct IPv4UdpAddress);
764 struct IPv6UdpAddress *u6;
765 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &socket_address;
766 u6 = GNUNET_new (struct IPv6UdpAddress);
767 u6->options = htonl (options);
768 u6->ipv6_addr = in6->sin6_addr;
769 u6->u6_port = in6->sin6_port;
771 *added = sizeof(struct IPv6UdpAddress);
776 return GNUNET_SYSERR;
782 * Append our port and forward the result.
784 * @param cls a `struct PrettyPrinterContext *`
785 * @param hostname result from DNS resolver
788 append_port (void *cls,
789 const char *hostname)
791 struct PrettyPrinterContext *ppc = cls;
792 struct Plugin *plugin = ppc->plugin;
795 if (NULL == hostname)
797 /* Final call, done */
798 ppc->asc (ppc->asc_cls,
801 GNUNET_CONTAINER_DLL_remove (plugin->ppc_dll_head,
802 plugin->ppc_dll_tail,
804 ppc->resolver_handle = NULL;
808 if (GNUNET_YES == ppc->ipv6)
809 GNUNET_asprintf (&ret,
816 GNUNET_asprintf (&ret,
822 ppc->asc (ppc->asc_cls,
830 * Convert the transports address to a nice, human-readable
833 * @param cls closure with the `struct Plugin *`
834 * @param type name of the transport that generated the address
835 * @param addr one of the addresses of the host, NULL for the last address
836 * the specific address format depends on the transport;
837 * a `union UdpAddress`
838 * @param addrlen length of the address
839 * @param numeric should (IP) addresses be displayed in numeric form?
840 * @param timeout after how long should we give up?
841 * @param asc function to call on each string
842 * @param asc_cls closure for @a asc
845 udp_plugin_address_pretty_printer (void *cls,
850 struct GNUNET_TIME_Relative timeout,
851 GNUNET_TRANSPORT_AddressStringCallback asc,
854 struct Plugin *plugin = cls;
855 struct PrettyPrinterContext *ppc;
858 struct sockaddr_in a4;
859 struct sockaddr_in6 a6;
860 const struct IPv4UdpAddress *u4;
861 const struct IPv6UdpAddress *u6;
865 if (addrlen == sizeof(struct IPv6UdpAddress))
868 memset (&a6, 0, sizeof(a6));
869 a6.sin6_family = AF_INET6;
870 #if HAVE_SOCKADDR_IN_SIN_LEN
871 a6.sin6_len = sizeof (a6);
873 a6.sin6_port = u6->u6_port;
874 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof(struct in6_addr));
875 port = ntohs (u6->u6_port);
876 options = ntohl (u6->options);
880 else if (addrlen == sizeof(struct IPv4UdpAddress))
883 memset (&a4, 0, sizeof(a4));
884 a4.sin_family = AF_INET;
885 #if HAVE_SOCKADDR_IN_SIN_LEN
886 a4.sin_len = sizeof (a4);
888 a4.sin_port = u4->u4_port;
889 a4.sin_addr.s_addr = u4->ipv4_addr;
890 port = ntohs (u4->u4_port);
891 options = ntohl (u4->options);
897 /* invalid address */
899 asc (asc_cls, NULL , GNUNET_SYSERR);
900 asc (asc_cls, NULL, GNUNET_OK);
903 ppc = GNUNET_new (struct PrettyPrinterContext);
904 ppc->plugin = plugin;
906 ppc->asc_cls = asc_cls;
908 ppc->options = options;
909 if (addrlen == sizeof(struct IPv6UdpAddress))
910 ppc->ipv6 = GNUNET_YES;
912 ppc->ipv6 = GNUNET_NO;
913 GNUNET_CONTAINER_DLL_insert (plugin->ppc_dll_head,
914 plugin->ppc_dll_tail,
917 = GNUNET_RESOLVER_hostname_get (sb,
929 call_continuation (struct UDP_MessageWrapper *udpw,
932 struct Session *session = udpw->session;
933 struct Plugin *plugin = session->plugin;
936 LOG (GNUNET_ERROR_TYPE_DEBUG,
937 "Calling continuation for %u byte message to `%s' with result %s\n",
938 udpw->payload_size, GNUNET_i2s (&udpw->session->target),
939 (GNUNET_OK == result) ? "OK" : "SYSERR");
941 if (udpw->msg_size >= udpw->payload_size)
942 overhead = udpw->msg_size - udpw->payload_size;
944 overhead = udpw->msg_size;
949 switch (udpw->msg_type)
951 case UMT_MSG_UNFRAGMENTED:
952 if (NULL != udpw->cont)
954 /* Transport continuation */
955 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
956 udpw->payload_size, udpw->msg_size);
958 GNUNET_STATISTICS_update (plugin->env->stats,
959 "# UDP, unfragmented msgs, messages, sent, success", 1, GNUNET_NO);
960 GNUNET_STATISTICS_update (plugin->env->stats,
961 "# UDP, unfragmented msgs, bytes payload, sent, success",
962 udpw->payload_size, GNUNET_NO);
963 GNUNET_STATISTICS_update (plugin->env->stats,
964 "# UDP, unfragmented msgs, bytes overhead, sent, success", overhead,
966 GNUNET_STATISTICS_update (plugin->env->stats,
967 "# UDP, total, bytes overhead, sent", overhead, GNUNET_NO);
968 GNUNET_STATISTICS_update (plugin->env->stats,
969 "# UDP, total, bytes payload, sent", udpw->payload_size, GNUNET_NO);
971 case UMT_MSG_FRAGMENTED_COMPLETE:
972 GNUNET_assert(NULL != udpw->frag_ctx);
973 if (udpw->frag_ctx->cont != NULL )
974 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target,
975 GNUNET_OK, udpw->frag_ctx->payload_size,
976 udpw->frag_ctx->on_wire_size);
977 GNUNET_STATISTICS_update (plugin->env->stats,
978 "# UDP, fragmented msgs, messages, sent, success", 1, GNUNET_NO);
979 GNUNET_STATISTICS_update (plugin->env->stats,
980 "# UDP, fragmented msgs, bytes payload, sent, success",
981 udpw->payload_size, GNUNET_NO);
982 GNUNET_STATISTICS_update (plugin->env->stats,
983 "# UDP, fragmented msgs, bytes overhead, sent, success", overhead,
985 GNUNET_STATISTICS_update (plugin->env->stats,
986 "# UDP, total, bytes overhead, sent", overhead, GNUNET_NO);
987 GNUNET_STATISTICS_update (plugin->env->stats,
988 "# UDP, total, bytes payload, sent", udpw->payload_size, GNUNET_NO);
989 GNUNET_STATISTICS_update (plugin->env->stats,
990 "# UDP, fragmented msgs, messages, pending", -1, GNUNET_NO);
992 case UMT_MSG_FRAGMENTED:
993 /* Fragmented message: enqueue next fragment */
994 if (NULL != udpw->cont)
995 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
996 udpw->payload_size, udpw->msg_size);
997 GNUNET_STATISTICS_update (plugin->env->stats,
998 "# UDP, fragmented msgs, fragments, sent, success", 1, GNUNET_NO);
999 GNUNET_STATISTICS_update (plugin->env->stats,
1000 "# UDP, fragmented msgs, fragments bytes, sent, success",
1001 udpw->msg_size, GNUNET_NO);
1004 /* No continuation */
1005 GNUNET_STATISTICS_update (plugin->env->stats,
1006 "# UDP, ACK msgs, messages, sent, success", 1, GNUNET_NO);
1007 GNUNET_STATISTICS_update (plugin->env->stats,
1008 "# UDP, ACK msgs, bytes overhead, sent, success", overhead,
1010 GNUNET_STATISTICS_update (plugin->env->stats,
1011 "# UDP, total, bytes overhead, sent", overhead, GNUNET_NO);
1019 switch (udpw->msg_type)
1021 case UMT_MSG_UNFRAGMENTED:
1022 /* Unfragmented message: failed to send */
1023 if (NULL != udpw->cont)
1024 udpw->cont (udpw->cont_cls, &udpw->session->target, result,
1025 udpw->payload_size, overhead);
1026 GNUNET_STATISTICS_update (plugin->env->stats,
1027 "# UDP, unfragmented msgs, messages, sent, failure", 1, GNUNET_NO);
1028 GNUNET_STATISTICS_update (plugin->env->stats,
1029 "# UDP, unfragmented msgs, bytes payload, sent, failure",
1030 udpw->payload_size, GNUNET_NO);
1031 GNUNET_STATISTICS_update (plugin->env->stats,
1032 "# UDP, unfragmented msgs, bytes overhead, sent, failure", overhead,
1035 case UMT_MSG_FRAGMENTED_COMPLETE:
1036 GNUNET_assert(NULL != udpw->frag_ctx);
1037 if (udpw->frag_ctx->cont != NULL )
1038 udpw->frag_ctx->cont (udpw->frag_ctx->cont_cls, &udpw->session->target,
1039 GNUNET_SYSERR, udpw->frag_ctx->payload_size,
1040 udpw->frag_ctx->on_wire_size);
1041 GNUNET_STATISTICS_update (plugin->env->stats,
1042 "# UDP, fragmented msgs, messages, sent, failure", 1, GNUNET_NO);
1043 GNUNET_STATISTICS_update (plugin->env->stats,
1044 "# UDP, fragmented msgs, bytes payload, sent, failure",
1045 udpw->payload_size, GNUNET_NO);
1046 GNUNET_STATISTICS_update (plugin->env->stats,
1047 "# UDP, fragmented msgs, bytes payload, sent, failure", overhead,
1049 GNUNET_STATISTICS_update (plugin->env->stats,
1050 "# UDP, fragmented msgs, bytes payload, sent, failure", overhead,
1052 GNUNET_STATISTICS_update (plugin->env->stats,
1053 "# UDP, fragmented msgs, messages, pending", -1, GNUNET_NO);
1055 case UMT_MSG_FRAGMENTED:
1056 GNUNET_assert(NULL != udpw->frag_ctx);
1057 /* Fragmented message: failed to send */
1058 GNUNET_STATISTICS_update (plugin->env->stats,
1059 "# UDP, fragmented msgs, fragments, sent, failure", 1, GNUNET_NO);
1060 GNUNET_STATISTICS_update (plugin->env->stats,
1061 "# UDP, fragmented msgs, fragments bytes, sent, failure",
1062 udpw->msg_size, GNUNET_NO);
1065 /* ACK message: failed to send */
1066 GNUNET_STATISTICS_update (plugin->env->stats,
1067 "# UDP, ACK msgs, messages, sent, failure", 1, GNUNET_NO);
1082 * Check if the given port is plausible (must be either our listen
1083 * port or our advertised port). If it is neither, we return
1086 * @param plugin global variables
1087 * @param in_port port number to check
1088 * @return #GNUNET_OK if port is either open_port or adv_port
1091 check_port (struct Plugin *plugin,
1094 if ((in_port == plugin->port) || (in_port == plugin->aport))
1096 return GNUNET_SYSERR;
1101 * Function that will be called to check if a binary address for this
1102 * plugin is well-formed and corresponds to an address for THIS peer
1103 * (as per our configuration). Naturally, if absolutely necessary,
1104 * plugins can be a bit conservative in their answer, but in general
1105 * plugins should make sure that the address does not redirect
1106 * traffic to a 3rd party that might try to man-in-the-middle our
1109 * @param cls closure, should be our handle to the Plugin
1110 * @param addr pointer to a `union UdpAddress`
1111 * @param addrlen length of @a addr
1112 * @return #GNUNET_OK if this is a plausible address for this peer
1113 * and transport, #GNUNET_SYSERR if not
1116 udp_plugin_check_address (void *cls,
1120 struct Plugin *plugin = cls;
1121 struct IPv4UdpAddress *v4;
1122 struct IPv6UdpAddress *v6;
1124 if ( (addrlen != sizeof(struct IPv4UdpAddress)) &&
1125 (addrlen != sizeof(struct IPv6UdpAddress)) )
1128 return GNUNET_SYSERR;
1130 if (addrlen == sizeof(struct IPv4UdpAddress))
1132 v4 = (struct IPv4UdpAddress *) addr;
1133 if (GNUNET_OK != check_port (plugin, ntohs (v4->u4_port)))
1134 return GNUNET_SYSERR;
1136 GNUNET_NAT_test_address (plugin->nat,
1138 sizeof (struct in_addr)))
1139 return GNUNET_SYSERR;
1143 v6 = (struct IPv6UdpAddress *) addr;
1144 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1147 return GNUNET_SYSERR;
1149 if (GNUNET_OK != check_port (plugin, ntohs (v6->u6_port)))
1150 return GNUNET_SYSERR;
1152 GNUNET_NAT_test_address (plugin->nat,
1154 sizeof(struct in6_addr)))
1155 return GNUNET_SYSERR;
1162 * Function to free last resources associated with a session.
1164 * @param s session to free
1167 free_session (struct Session *s)
1169 if (NULL != s->frag_ctx)
1171 GNUNET_FRAGMENT_context_destroy (s->frag_ctx->frag, NULL, NULL );
1172 GNUNET_free(s->frag_ctx);
1180 * Remove a message from the transmission queue.
1182 * @param plugin the UDP plugin
1183 * @param udpw message wrapper to queue
1186 dequeue (struct Plugin *plugin,
1187 struct UDP_MessageWrapper *udpw)
1189 struct Session *session = udpw->session;
1191 if (plugin->bytes_in_buffer < udpw->msg_size)
1197 GNUNET_STATISTICS_update (plugin->env->stats,
1198 "# UDP, total, bytes in buffers",
1199 -(long long) udpw->msg_size,
1201 plugin->bytes_in_buffer -= udpw->msg_size;
1203 GNUNET_STATISTICS_update (plugin->env->stats,
1204 "# UDP, total, msgs in buffers",
1206 if (udpw->session->address->address_length == sizeof(struct IPv4UdpAddress))
1207 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_queue_head,
1208 plugin->ipv4_queue_tail,
1210 else if (udpw->session->address->address_length == sizeof(struct IPv6UdpAddress))
1211 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_queue_head,
1212 plugin->ipv6_queue_tail,
1219 GNUNET_assert (session->msgs_in_queue > 0);
1220 session->msgs_in_queue--;
1221 GNUNET_assert (session->bytes_in_queue >= udpw->msg_size);
1222 session->bytes_in_queue -= udpw->msg_size;
1230 fragmented_message_done (struct UDP_FragmentationContext *fc,
1233 struct Plugin *plugin = fc->plugin;
1234 struct Session *s = fc->session;
1235 struct UDP_MessageWrapper *udpw;
1236 struct UDP_MessageWrapper *tmp;
1237 struct UDP_MessageWrapper dummy;
1239 LOG (GNUNET_ERROR_TYPE_DEBUG,
1240 "%p : Fragmented message removed with result %s\n",
1242 (result == GNUNET_SYSERR) ? "FAIL" : "SUCCESS");
1244 /* Call continuation for fragmented message */
1245 memset (&dummy, 0, sizeof(dummy));
1246 dummy.msg_type = UMT_MSG_FRAGMENTED_COMPLETE;
1247 dummy.msg_size = s->frag_ctx->on_wire_size;
1248 dummy.payload_size = s->frag_ctx->payload_size;
1249 dummy.frag_ctx = s->frag_ctx;
1251 dummy.cont_cls = NULL;
1253 call_continuation (&dummy, result);
1254 /* Remove leftover fragments from queue */
1255 if (s->address->address_length == sizeof(struct IPv6UdpAddress))
1257 udpw = plugin->ipv6_queue_head;
1258 while (NULL != udpw)
1261 if ((udpw->frag_ctx != NULL )&& (udpw->frag_ctx == s->frag_ctx)){
1262 dequeue (plugin, udpw);
1263 call_continuation (udpw, GNUNET_SYSERR);
1269 if (s->address->address_length == sizeof(struct IPv4UdpAddress))
1271 udpw = plugin->ipv4_queue_head;
1272 while (udpw != NULL )
1275 if ((NULL != udpw->frag_ctx) && (udpw->frag_ctx == s->frag_ctx))
1277 dequeue (plugin, udpw);
1278 call_continuation (udpw, GNUNET_SYSERR);
1284 notify_session_monitor (s->plugin,
1286 GNUNET_TRANSPORT_SS_UPDATE);
1287 /* Destroy fragmentation context */
1288 GNUNET_FRAGMENT_context_destroy (fc->frag,
1289 &s->last_expected_msg_delay,
1290 &s->last_expected_ack_delay);
1297 * Scan the heap for a receive context with the given address.
1299 * @param cls the `struct FindReceiveContext`
1300 * @param node internal node of the heap
1301 * @param element value stored at the node (a `struct ReceiveContext`)
1302 * @param cost cost associated with the node
1303 * @return #GNUNET_YES if we should continue to iterate,
1304 * #GNUNET_NO if not.
1307 find_receive_context (void *cls,
1308 struct GNUNET_CONTAINER_HeapNode *node,
1310 GNUNET_CONTAINER_HeapCostType cost)
1312 struct FindReceiveContext *frc = cls;
1313 struct DefragContext *e = element;
1315 if ( (frc->udp_addr_len == e->udp_addr_len) &&
1316 (0 == memcmp (frc->udp_addr,
1318 frc->udp_addr_len)) )
1328 * Functions with this signature are called whenever we need
1329 * to close a session due to a disconnect or failure to
1330 * establish a connection.
1332 * @param cls closure with the `struct Plugin`
1333 * @param s session to close down
1334 * @return #GNUNET_OK on success
1337 udp_disconnect_session (void *cls,
1340 struct Plugin *plugin = cls;
1341 struct UDP_MessageWrapper *udpw;
1342 struct UDP_MessageWrapper *next;
1343 struct FindReceiveContext frc;
1345 GNUNET_assert (GNUNET_YES != s->in_destroy);
1346 LOG (GNUNET_ERROR_TYPE_DEBUG,
1347 "Session %p to peer `%s' address ended\n", s,
1348 GNUNET_i2s (&s->target),
1349 udp_address_to_string (plugin,
1350 s->address->address,
1351 s->address->address_length));
1352 /* stop timeout task */
1353 if (NULL != s->timeout_task)
1355 GNUNET_SCHEDULER_cancel (s->timeout_task);
1356 s->timeout_task = NULL;
1358 if (NULL != s->frag_ctx)
1360 /* Remove fragmented message due to disconnect */
1361 fragmented_message_done (s->frag_ctx,
1366 frc.udp_addr = s->address->address;
1367 frc.udp_addr_len = s->address->address_length;
1368 /* Lookup existing receive context for this address */
1369 if (NULL != plugin->defrag_ctxs)
1371 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
1372 &find_receive_context,
1376 struct DefragContext *d_ctx = frc.rc;
1378 GNUNET_CONTAINER_heap_remove_node (d_ctx->hnode);
1379 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
1380 GNUNET_free (d_ctx);
1383 next = plugin->ipv4_queue_head;
1384 while (NULL != (udpw = next))
1387 if (udpw->session == s)
1389 dequeue (plugin, udpw);
1390 call_continuation (udpw, GNUNET_SYSERR);
1394 next = plugin->ipv6_queue_head;
1395 while (NULL != (udpw = next))
1398 if (udpw->session == s)
1400 dequeue (plugin, udpw);
1401 call_continuation (udpw, GNUNET_SYSERR);
1405 notify_session_monitor (s->plugin,
1407 GNUNET_TRANSPORT_SS_DONE);
1408 plugin->env->session_end (plugin->env->cls,
1412 if (NULL != s->frag_ctx)
1414 if (NULL != s->frag_ctx->cont)
1416 s->frag_ctx->cont (s->frag_ctx->cont_cls,
1419 s->frag_ctx->payload_size,
1420 s->frag_ctx->on_wire_size);
1421 LOG (GNUNET_ERROR_TYPE_DEBUG,
1422 "Calling continuation for fragemented message to `%s' with result SYSERR\n",
1423 GNUNET_i2s (&s->target));
1427 GNUNET_assert (GNUNET_YES ==
1428 GNUNET_CONTAINER_multipeermap_remove (plugin->sessions,
1431 GNUNET_STATISTICS_set (plugin->env->stats,
1432 "# UDP sessions active",
1433 GNUNET_CONTAINER_multipeermap_size (plugin->sessions),
1437 s->in_destroy = GNUNET_YES;
1441 GNUNET_HELLO_address_free (s->address);
1449 * Function that is called to get the keepalive factor.
1450 * #GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to
1451 * calculate the interval between keepalive packets.
1453 * @param cls closure with the `struct Plugin`
1454 * @return keepalive factor
1457 udp_query_keepalive_factor (void *cls)
1464 * Destroy a session, plugin is being unloaded.
1466 * @param cls the `struct Plugin`
1467 * @param key hash of public key of target peer
1468 * @param value a `struct PeerSession *` to clean up
1469 * @return #GNUNET_OK (continue to iterate)
1472 disconnect_and_free_it (void *cls,
1473 const struct GNUNET_PeerIdentity *key,
1476 struct Plugin *plugin = cls;
1478 udp_disconnect_session (plugin, value);
1484 * Disconnect from a remote node. Clean up session if we have one for
1487 * @param cls closure for this call (should be handle to Plugin)
1488 * @param target the peeridentity of the peer to disconnect
1489 * @return #GNUNET_OK on success, #GNUNET_SYSERR if the operation failed
1492 udp_disconnect (void *cls,
1493 const struct GNUNET_PeerIdentity *target)
1495 struct Plugin *plugin = cls;
1497 LOG (GNUNET_ERROR_TYPE_DEBUG,
1498 "Disconnecting from peer `%s'\n",
1499 GNUNET_i2s (target));
1500 /* Clean up sessions */
1501 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessions,
1503 &disconnect_and_free_it,
1509 * Session was idle, so disconnect it
1511 * @param cls the `struct Session` to time out
1512 * @param tc scheduler context
1515 session_timeout (void *cls,
1516 const struct GNUNET_SCHEDULER_TaskContext *tc)
1518 struct Session *s = cls;
1519 struct Plugin *plugin = s->plugin;
1520 struct GNUNET_TIME_Relative left;
1522 s->timeout_task = NULL;
1523 left = GNUNET_TIME_absolute_get_remaining (s->timeout);
1524 if (left.rel_value_us > 0)
1526 /* not actually our turn yet, but let's at least update
1527 the monitor, it may think we're about to die ... */
1528 notify_session_monitor (s->plugin,
1530 GNUNET_TRANSPORT_SS_UPDATE);
1531 s->timeout_task = GNUNET_SCHEDULER_add_delayed (left,
1536 LOG (GNUNET_ERROR_TYPE_DEBUG,
1537 "Session %p was idle for %s, disconnecting\n",
1539 GNUNET_STRINGS_relative_time_to_string (UDP_SESSION_TIME_OUT,
1541 /* call session destroy function */
1542 udp_disconnect_session (plugin, s);
1547 * Increment session timeout due to activity
1549 * @param s session to reschedule timeout activity for
1552 reschedule_session_timeout (struct Session *s)
1554 if (GNUNET_YES == s->in_destroy)
1556 GNUNET_assert(NULL != s->timeout_task);
1557 s->timeout = GNUNET_TIME_relative_to_absolute (UDP_SESSION_TIME_OUT);
1564 static struct Session *
1565 create_session (struct Plugin *plugin,
1566 const struct GNUNET_HELLO_Address *address)
1570 s = GNUNET_new (struct Session);
1572 s->address = GNUNET_HELLO_address_copy (address);
1573 s->target = address->peer;
1574 s->last_expected_ack_delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
1576 s->last_expected_msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
1577 s->flow_delay_from_other_peer = GNUNET_TIME_UNIT_ZERO_ABS;
1578 s->flow_delay_for_other_peer = GNUNET_TIME_UNIT_ZERO;
1579 s->timeout = GNUNET_TIME_relative_to_absolute (UDP_SESSION_TIME_OUT);
1580 s->timeout_task = GNUNET_SCHEDULER_add_delayed (UDP_SESSION_TIME_OUT,
1581 &session_timeout, s);
1587 * Function obtain the network type for a session
1589 * @param cls closure ('struct Plugin*')
1590 * @param session the session
1591 * @return the network type
1593 static enum GNUNET_ATS_Network_Type
1594 udp_get_network (void *cls,
1595 struct Session *session)
1597 return session->scope;
1602 * Closure for #session_cmp_it().
1604 struct SessionCompareContext
1607 * Set to session matching the address.
1609 struct Session *res;
1612 * Address we are looking for.
1614 const struct GNUNET_HELLO_Address *address;
1619 * Find a session with a matching address.
1621 * @param cls the `struct SessionCompareContext *`
1622 * @param key peer identity (unused)
1623 * @param value the `struct Session *`
1624 * @return #GNUNET_NO if we found the session, #GNUNET_OK if not
1627 session_cmp_it (void *cls,
1628 const struct GNUNET_PeerIdentity *key,
1631 struct SessionCompareContext *cctx = cls;
1632 const struct GNUNET_HELLO_Address *address = cctx->address;
1633 struct Session *s = value;
1635 LOG (GNUNET_ERROR_TYPE_DEBUG,
1636 "Comparing address %s <-> %s\n",
1637 udp_address_to_string (s->plugin,
1639 address->address_length),
1640 udp_address_to_string (s->plugin,
1641 s->address->address,
1642 s->address->address_length));
1643 if (0 == GNUNET_HELLO_address_cmp(s->address, cctx->address))
1653 * Locate an existing session the transport service is using to
1654 * send data to another peer. Performs some basic sanity checks
1655 * on the address and then tries to locate a matching session.
1657 * @param cls the plugin
1658 * @param address the address we should locate the session by
1659 * @return the session if it exists, or NULL if it is not found
1661 static struct Session *
1662 udp_plugin_lookup_session (void *cls,
1663 const struct GNUNET_HELLO_Address *address)
1665 struct Plugin *plugin = cls;
1666 const struct IPv6UdpAddress *udp_a6;
1667 const struct IPv4UdpAddress *udp_a4;
1668 struct SessionCompareContext cctx;
1670 if ( (NULL == address->address) ||
1671 ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
1672 (address->address_length != sizeof (struct IPv6UdpAddress))))
1674 LOG (GNUNET_ERROR_TYPE_WARNING,
1675 _("Trying to locate session for address of unexpected length %u (should be %u or %u)\n"),
1676 address->address_length,
1677 sizeof (struct IPv4UdpAddress),
1678 sizeof (struct IPv6UdpAddress));
1682 if (address->address_length == sizeof(struct IPv4UdpAddress))
1684 if (NULL == plugin->sockv4)
1686 udp_a4 = (const struct IPv4UdpAddress *) address->address;
1687 if (0 == udp_a4->u4_port)
1691 if (address->address_length == sizeof(struct IPv6UdpAddress))
1693 if (NULL == plugin->sockv6)
1695 udp_a6 = (const struct IPv6UdpAddress *) address->address;
1696 if (0 == udp_a6->u6_port)
1700 /* check if session already exists */
1701 cctx.address = address;
1703 LOG (GNUNET_ERROR_TYPE_DEBUG,
1704 "Looking for existing session for peer `%s' `%s' \n",
1705 GNUNET_i2s (&address->peer),
1706 udp_address_to_string (plugin,
1708 address->address_length));
1709 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessions,
1713 if (NULL != cctx.res)
1715 LOG (GNUNET_ERROR_TYPE_DEBUG,
1716 "Found existing session %p\n",
1725 * Allocate a new session for the given endpoint address.
1726 * Note that this function does not inform the service
1727 * of the new session, this is the responsibility of the
1728 * caller (if needed).
1730 * @param cls the `struct Plugin`
1731 * @param address address of the other peer to use
1732 * @param network_type network type the address belongs to
1733 * @return NULL on error, otherwise session handle
1735 static struct Session *
1736 udp_plugin_create_session (void *cls,
1737 const struct GNUNET_HELLO_Address *address,
1738 enum GNUNET_ATS_Network_Type network_type)
1740 struct Plugin *plugin = cls;
1743 s = create_session (plugin, address);
1744 s->scope = network_type;
1746 LOG (GNUNET_ERROR_TYPE_DEBUG,
1747 "Creating new session %p for peer `%s' address `%s'\n",
1749 GNUNET_i2s (&address->peer),
1750 udp_address_to_string (plugin,
1752 address->address_length));
1753 GNUNET_assert(GNUNET_OK ==
1754 GNUNET_CONTAINER_multipeermap_put (plugin->sessions,
1757 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1758 GNUNET_STATISTICS_set (plugin->env->stats,
1759 "# UDP sessions active",
1760 GNUNET_CONTAINER_multipeermap_size (plugin->sessions),
1767 * Function that will be called whenever the transport service wants to
1768 * notify the plugin that a session is still active and in use and
1769 * therefore the session timeout for this session has to be updated
1771 * @param cls closure
1772 * @param peer which peer was the session for
1773 * @param session which session is being updated
1776 udp_plugin_update_session_timeout (void *cls,
1777 const struct GNUNET_PeerIdentity *peer,
1778 struct Session *session)
1780 struct Plugin *plugin = cls;
1783 GNUNET_CONTAINER_multipeermap_contains_value (plugin->sessions,
1790 /* Reschedule session timeout */
1791 reschedule_session_timeout (session);
1796 * Creates a new outbound session the transport service will use to
1797 * send data to the peer.
1799 * @param cls the plugin
1800 * @param address the address
1801 * @return the session or NULL of max connections exceeded
1803 static struct Session *
1804 udp_plugin_get_session (void *cls,
1805 const struct GNUNET_HELLO_Address *address)
1807 struct Plugin *plugin = cls;
1809 enum GNUNET_ATS_Network_Type network_type;
1810 struct IPv4UdpAddress *udp_v4;
1811 struct IPv6UdpAddress *udp_v6;
1813 if (NULL == address)
1818 if ( (address->address_length != sizeof(struct IPv4UdpAddress)) &&
1819 (address->address_length != sizeof(struct IPv6UdpAddress)) )
1821 if (NULL != (s = udp_plugin_lookup_session (cls,
1825 if (sizeof (struct IPv4UdpAddress) == address->address_length)
1827 struct sockaddr_in v4;
1829 udp_v4 = (struct IPv4UdpAddress *) address->address;
1830 memset (&v4, '\0', sizeof (v4));
1831 v4.sin_family = AF_INET;
1832 #if HAVE_SOCKADDR_IN_SIN_LEN
1833 v4.sin_len = sizeof (struct sockaddr_in);
1835 v4.sin_port = udp_v4->u4_port;
1836 v4.sin_addr.s_addr = udp_v4->ipv4_addr;
1837 network_type = plugin->env->get_address_type (plugin->env->cls,
1838 (const struct sockaddr *) &v4,
1841 else if (sizeof (struct IPv6UdpAddress) == address->address_length)
1843 struct sockaddr_in6 v6;
1845 udp_v6 = (struct IPv6UdpAddress *) address->address;
1846 memset (&v6, '\0', sizeof (v6));
1847 v6.sin6_family = AF_INET6;
1848 #if HAVE_SOCKADDR_IN_SIN_LEN
1849 v6.sin6_len = sizeof (struct sockaddr_in6);
1851 v6.sin6_port = udp_v6->u6_port;
1852 v6.sin6_addr = udp_v6->ipv6_addr;
1853 network_type = plugin->env->get_address_type (plugin->env->cls,
1854 (const struct sockaddr *) &v6,
1858 /* otherwise create new */
1859 return udp_plugin_create_session (cls, address, network_type);
1864 * Enqueue a message for transmission.
1866 * @param plugin the UDP plugin
1867 * @param udpw message wrapper to queue
1870 enqueue (struct Plugin *plugin,
1871 struct UDP_MessageWrapper *udpw)
1873 struct Session *session = udpw->session;
1875 if (plugin->bytes_in_buffer + udpw->msg_size > INT64_MAX)
1881 GNUNET_STATISTICS_update (plugin->env->stats,
1882 "# UDP, total, bytes in buffers", udpw->msg_size, GNUNET_NO);
1883 plugin->bytes_in_buffer += udpw->msg_size;
1885 GNUNET_STATISTICS_update (plugin->env->stats,
1886 "# UDP, total, msgs in buffers",
1888 if (udpw->session->address->address_length == sizeof (struct IPv4UdpAddress))
1889 GNUNET_CONTAINER_DLL_insert(plugin->ipv4_queue_head,
1890 plugin->ipv4_queue_tail,
1892 else if (udpw->session->address->address_length == sizeof (struct IPv6UdpAddress))
1893 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_queue_head,
1894 plugin->ipv6_queue_tail,
1901 session->msgs_in_queue++;
1902 session->bytes_in_queue += udpw->msg_size;
1907 * Fragment message was transmitted via UDP, let fragmentation know
1908 * to send the next fragment now.
1910 * @param cls the `struct UDPMessageWrapper *` of the fragment
1911 * @param target destination peer (ignored)
1912 * @param result #GNUNET_OK on success (ignored)
1913 * @param payload bytes payload sent
1914 * @param physical bytes physical sent
1917 send_next_fragment (void *cls,
1918 const struct GNUNET_PeerIdentity *target,
1923 struct UDP_MessageWrapper *udpw = cls;
1925 GNUNET_FRAGMENT_context_transmission_done (udpw->frag_ctx->frag);
1930 * Function that is called with messages created by the fragmentation
1931 * module. In the case of the 'proc' callback of the
1932 * #GNUNET_FRAGMENT_context_create() function, this function must
1933 * eventually call #GNUNET_FRAGMENT_context_transmission_done().
1935 * @param cls closure, the 'struct FragmentationContext'
1936 * @param msg the message that was created
1939 enqueue_fragment (void *cls,
1940 const struct GNUNET_MessageHeader *msg)
1942 struct UDP_FragmentationContext *frag_ctx = cls;
1943 struct Plugin *plugin = frag_ctx->plugin;
1944 struct UDP_MessageWrapper * udpw;
1945 size_t msg_len = ntohs (msg->size);
1947 LOG (GNUNET_ERROR_TYPE_DEBUG,
1948 "Enqueuing fragment with %u bytes\n",
1950 frag_ctx->fragments_used++;
1951 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msg_len);
1952 udpw->session = frag_ctx->session;
1953 udpw->msg_buf = (char *) &udpw[1];
1954 udpw->msg_size = msg_len;
1955 udpw->payload_size = msg_len; /*FIXME: minus fragment overhead */
1956 udpw->cont = &send_next_fragment;
1957 udpw->cont_cls = udpw;
1958 udpw->timeout = frag_ctx->timeout;
1959 udpw->frag_ctx = frag_ctx;
1960 udpw->msg_type = UMT_MSG_FRAGMENTED;
1961 memcpy (udpw->msg_buf, msg, msg_len);
1962 enqueue (plugin, udpw);
1963 schedule_select (plugin);
1968 * Function that can be used by the transport service to transmit
1969 * a message using the plugin. Note that in the case of a
1970 * peer disconnecting, the continuation MUST be called
1971 * prior to the disconnect notification itself. This function
1972 * will be called with this peer's HELLO message to initiate
1973 * a fresh connection to another peer.
1975 * @param cls closure
1976 * @param s which session must be used
1977 * @param msgbuf the message to transmit
1978 * @param msgbuf_size number of bytes in 'msgbuf'
1979 * @param priority how important is the message (most plugins will
1980 * ignore message priority and just FIFO)
1981 * @param to how long to wait at most for the transmission (does not
1982 * require plugins to discard the message after the timeout,
1983 * just advisory for the desired delay; most plugins will ignore
1985 * @param cont continuation to call once the message has
1986 * been transmitted (or if the transport is ready
1987 * for the next transmission call; or if the
1988 * peer disconnected...); can be NULL
1989 * @param cont_cls closure for cont
1990 * @return number of bytes used (on the physical network, with overheads);
1991 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1992 * and does NOT mean that the message was not transmitted (DV)
1995 udp_plugin_send (void *cls,
1999 unsigned int priority,
2000 struct GNUNET_TIME_Relative to,
2001 GNUNET_TRANSPORT_TransmitContinuation cont,
2004 struct Plugin *plugin = cls;
2005 size_t udpmlen = msgbuf_size + sizeof(struct UDPMessage);
2006 struct UDP_FragmentationContext * frag_ctx;
2007 struct UDP_MessageWrapper * udpw;
2008 struct UDPMessage *udp;
2010 GNUNET_assert(plugin != NULL);
2011 GNUNET_assert(s != NULL);
2013 if ( (s->address->address_length == sizeof(struct IPv6UdpAddress)) &&
2014 (plugin->sockv6 == NULL) )
2015 return GNUNET_SYSERR;
2016 if ( (s->address->address_length == sizeof(struct IPv4UdpAddress)) &&
2017 (plugin->sockv4 == NULL) )
2018 return GNUNET_SYSERR;
2019 if (udpmlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
2022 return GNUNET_SYSERR;
2025 GNUNET_CONTAINER_multipeermap_contains_value (plugin->sessions,
2030 return GNUNET_SYSERR;
2032 LOG (GNUNET_ERROR_TYPE_DEBUG,
2033 "UDP transmits %u-byte message to `%s' using address `%s'\n",
2035 GNUNET_i2s (&s->target),
2036 udp_address_to_string (plugin,
2037 s->address->address,
2038 s->address->address_length));
2041 udp = (struct UDPMessage *) mbuf;
2042 udp->header.size = htons (udpmlen);
2043 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
2044 udp->reserved = htonl (0);
2045 udp->sender = *plugin->env->my_identity;
2047 /* We do not update the session time out here!
2048 * Otherwise this session will not timeout since we send keep alive before
2049 * session can timeout
2051 * For UDP we update session timeout only on receive, this will cover keep
2052 * alives, since remote peer will reply with keep alive response!
2054 if (udpmlen <= UDP_MTU)
2056 /* unfragmented message */
2057 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + udpmlen);
2059 udpw->msg_buf = (char *) &udpw[1];
2060 udpw->msg_size = udpmlen; /* message size with UDP overhead */
2061 udpw->payload_size = msgbuf_size; /* message size without UDP overhead */
2062 udpw->timeout = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (), to);
2064 udpw->cont_cls = cont_cls;
2065 udpw->frag_ctx = NULL;
2066 udpw->msg_type = UMT_MSG_UNFRAGMENTED;
2067 memcpy (udpw->msg_buf, udp, sizeof(struct UDPMessage));
2068 memcpy (&udpw->msg_buf[sizeof(struct UDPMessage)], msgbuf, msgbuf_size);
2069 enqueue (plugin, udpw);
2071 GNUNET_STATISTICS_update (plugin->env->stats,
2072 "# UDP, unfragmented msgs, messages, attempt", 1, GNUNET_NO);
2073 GNUNET_STATISTICS_update (plugin->env->stats,
2074 "# UDP, unfragmented msgs, bytes payload, attempt",
2080 /* fragmented message */
2081 if (s->frag_ctx != NULL)
2082 return GNUNET_SYSERR;
2083 memcpy (&udp[1], msgbuf, msgbuf_size);
2084 frag_ctx = GNUNET_new (struct UDP_FragmentationContext);
2085 frag_ctx->plugin = plugin;
2086 frag_ctx->session = s;
2087 frag_ctx->cont = cont;
2088 frag_ctx->cont_cls = cont_cls;
2089 frag_ctx->timeout = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
2091 frag_ctx->payload_size = msgbuf_size; /* unfragmented message size without UDP overhead */
2092 frag_ctx->on_wire_size = 0; /* bytes with UDP and fragmentation overhead */
2093 frag_ctx->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
2096 s->last_expected_msg_delay,
2097 s->last_expected_ack_delay,
2101 s->frag_ctx = frag_ctx;
2102 GNUNET_STATISTICS_update (plugin->env->stats,
2103 "# UDP, fragmented msgs, messages, pending",
2106 GNUNET_STATISTICS_update (plugin->env->stats,
2107 "# UDP, fragmented msgs, messages, attempt",
2110 GNUNET_STATISTICS_update (plugin->env->stats,
2111 "# UDP, fragmented msgs, bytes payload, attempt",
2112 frag_ctx->payload_size,
2115 notify_session_monitor (s->plugin,
2117 GNUNET_TRANSPORT_SS_UPDATE);
2118 schedule_select (plugin);
2124 * Our external IP address/port mapping has changed.
2126 * @param cls closure, the `struct LocalAddrList`
2127 * @param add_remove #GNUNET_YES to mean the new public IP address, #GNUNET_NO to mean
2128 * the previous (now invalid) one
2129 * @param addr either the previous or the new public IP address
2130 * @param addrlen actual lenght of the address
2133 udp_nat_port_map_callback (void *cls,
2135 const struct sockaddr *addr,
2138 struct Plugin *plugin = cls;
2139 struct GNUNET_HELLO_Address *address;
2140 struct IPv4UdpAddress u4;
2141 struct IPv6UdpAddress u6;
2145 LOG (GNUNET_ERROR_TYPE_INFO,
2146 "NAT notification to %s address `%s'\n",
2147 (GNUNET_YES == add_remove) ? "add" : "remove",
2148 GNUNET_a2s (addr, addrlen));
2150 /* convert 'address' to our internal format */
2151 switch (addr->sa_family)
2154 GNUNET_assert(addrlen == sizeof(struct sockaddr_in));
2155 memset (&u4, 0, sizeof(u4));
2156 u4.options = htonl (plugin->myoptions);
2157 u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
2158 u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
2159 if (0 == ((struct sockaddr_in *) addr)->sin_port)
2162 args = sizeof(struct IPv4UdpAddress);
2165 GNUNET_assert(addrlen == sizeof(struct sockaddr_in6));
2166 memset (&u6, 0, sizeof(u6));
2167 u6.options = htonl (plugin->myoptions);
2168 if (0 == ((struct sockaddr_in6 *) addr)->sin6_port)
2170 memcpy (&u6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
2171 sizeof(struct in6_addr));
2172 u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
2174 args = sizeof(struct IPv6UdpAddress);
2180 /* modify our published address list */
2181 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
2184 GNUNET_HELLO_ADDRESS_INFO_NONE);
2185 plugin->env->notify_address (plugin->env->cls, add_remove, address);
2186 GNUNET_HELLO_address_free (address);
2191 * Message tokenizer has broken up an incomming message. Pass it on
2194 * @param cls the `struct Plugin *`
2195 * @param client the `struct SourceInformation *`
2196 * @param hdr the actual message
2197 * @return #GNUNET_OK (always)
2200 process_inbound_tokenized_messages (void *cls,
2202 const struct GNUNET_MessageHeader *hdr)
2204 struct Plugin *plugin = cls;
2205 struct SourceInformation *si = client;
2206 struct GNUNET_TIME_Relative delay;
2208 GNUNET_assert (NULL != si->session);
2209 if (GNUNET_YES == si->session->in_destroy)
2212 reschedule_session_timeout (si->session);
2213 delay = plugin->env->receive (plugin->env->cls,
2214 si->session->address,
2217 si->session->flow_delay_for_other_peer = delay;
2223 * We've received a UDP Message. Process it (pass contents to main service).
2225 * @param plugin plugin context
2226 * @param msg the message
2227 * @param udp_addr sender address
2228 * @param udp_addr_len number of bytes in @a udp_addr
2229 * @param network_type network type the address belongs to
2232 process_udp_message (struct Plugin *plugin,
2233 const struct UDPMessage *msg,
2234 const union UdpAddress *udp_addr,
2235 size_t udp_addr_len,
2236 enum GNUNET_ATS_Network_Type network_type)
2238 struct SourceInformation si;
2240 struct GNUNET_HELLO_Address *address;
2242 if (0 != ntohl (msg->reserved))
2247 if (ntohs (msg->header.size)
2248 < sizeof(struct GNUNET_MessageHeader) + sizeof(struct UDPMessage))
2254 address = GNUNET_HELLO_address_allocate (&msg->sender,
2258 GNUNET_HELLO_ADDRESS_INFO_NONE);
2260 (s = udp_plugin_lookup_session (plugin, address)))
2262 s = udp_plugin_create_session (plugin,
2265 plugin->env->session_start (plugin->env->cls,
2269 notify_session_monitor (s->plugin,
2271 GNUNET_TRANSPORT_SS_INIT);
2272 notify_session_monitor (s->plugin,
2274 GNUNET_TRANSPORT_SS_UP);
2276 GNUNET_free (address);
2278 /* iterate over all embedded messages */
2280 si.sender = msg->sender;
2282 GNUNET_SERVER_mst_receive (plugin->mst,
2284 (const char *) &msg[1],
2285 ntohs (msg->header.size) - sizeof(struct UDPMessage),
2289 if ((0 == s->rc) && (GNUNET_YES == s->in_destroy))
2295 * Process a defragmented message.
2297 * @param cls the `struct DefragContext *`
2298 * @param msg the message
2301 fragment_msg_proc (void *cls,
2302 const struct GNUNET_MessageHeader *msg)
2304 struct DefragContext *rc = cls;
2305 const struct UDPMessage *um;
2307 if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
2312 if (ntohs (msg->size) < sizeof(struct UDPMessage))
2317 um = (const struct UDPMessage *) msg;
2318 rc->sender = um->sender;
2319 rc->have_sender = GNUNET_YES;
2320 process_udp_message (rc->plugin,
2329 * Transmit an acknowledgement.
2331 * @param cls the `struct DefragContext *`
2332 * @param id message ID (unused)
2333 * @param msg ack to transmit
2336 ack_proc (void *cls,
2338 const struct GNUNET_MessageHeader *msg)
2340 struct DefragContext *rc = cls;
2341 size_t msize = sizeof(struct UDP_ACK_Message) + ntohs (msg->size);
2342 struct UDP_ACK_Message *udp_ack;
2344 struct UDP_MessageWrapper *udpw;
2346 struct GNUNET_HELLO_Address *address;
2348 if (GNUNET_NO == rc->have_sender)
2350 /* tried to defragment but never succeeded, hence will not ACK */
2351 GNUNET_break_op (0);
2354 address = GNUNET_HELLO_address_allocate (&rc->sender,
2358 GNUNET_HELLO_ADDRESS_INFO_NONE);
2359 s = udp_plugin_lookup_session (rc->plugin,
2361 GNUNET_HELLO_address_free (address);
2364 LOG (GNUNET_ERROR_TYPE_ERROR,
2365 "Trying to transmit ACK to peer `%s' but no session found!\n",
2366 udp_address_to_string (rc->plugin,
2369 GNUNET_CONTAINER_heap_remove_node (rc->hnode);
2370 GNUNET_DEFRAGMENT_context_destroy (rc->defrag);
2374 if (s->flow_delay_for_other_peer.rel_value_us <= UINT32_MAX)
2375 delay = s->flow_delay_for_other_peer.rel_value_us;
2377 LOG (GNUNET_ERROR_TYPE_DEBUG,
2378 "Sending ACK to `%s' including delay of %s\n",
2379 udp_address_to_string (rc->plugin,
2382 GNUNET_STRINGS_relative_time_to_string (s->flow_delay_for_other_peer,
2384 udpw = GNUNET_malloc (sizeof (struct UDP_MessageWrapper) + msize);
2385 udpw->msg_size = msize;
2386 udpw->payload_size = 0;
2388 udpw->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
2389 udpw->msg_buf = (char *) &udpw[1];
2390 udpw->msg_type = UMT_MSG_ACK;
2391 udp_ack = (struct UDP_ACK_Message *) udpw->msg_buf;
2392 udp_ack->header.size = htons ((uint16_t) msize);
2393 udp_ack->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
2394 udp_ack->delay = htonl (delay);
2395 udp_ack->sender = *rc->plugin->env->my_identity;
2396 memcpy (&udp_ack[1], msg, ntohs (msg->size));
2397 enqueue (rc->plugin, udpw);
2398 notify_session_monitor (s->plugin,
2400 GNUNET_TRANSPORT_SS_UPDATE);
2401 schedule_select (rc->plugin);
2406 * Handle an ACK message.
2408 * @param plugin the UDP plugin
2409 * @param msg the (presumed) UDP ACK message
2410 * @param udp_addr sender address
2411 * @param udp_addr_len number of bytes in @a udp_addr
2414 read_process_ack (struct Plugin *plugin,
2415 const struct GNUNET_MessageHeader *msg,
2416 const union UdpAddress *udp_addr,
2417 socklen_t udp_addr_len)
2419 const struct GNUNET_MessageHeader *ack;
2420 const struct UDP_ACK_Message *udp_ack;
2421 struct GNUNET_HELLO_Address *address;
2423 struct GNUNET_TIME_Relative flow_delay;
2425 if (ntohs (msg->size)
2426 < sizeof(struct UDP_ACK_Message) + sizeof(struct GNUNET_MessageHeader))
2431 udp_ack = (const struct UDP_ACK_Message *) msg;
2432 address = GNUNET_HELLO_address_allocate (&udp_ack->sender,
2436 GNUNET_HELLO_ADDRESS_INFO_NONE);
2437 s = udp_plugin_lookup_session (plugin,
2440 (NULL == s->frag_ctx) )
2442 LOG (GNUNET_ERROR_TYPE_WARNING,
2443 "UDP session of address %s for ACK not found\n",
2444 udp_address_to_string (plugin,
2446 address->address_length));
2447 GNUNET_HELLO_address_free (address);
2450 GNUNET_HELLO_address_free (address);
2452 flow_delay.rel_value_us = (uint64_t) ntohl (udp_ack->delay);
2453 LOG (GNUNET_ERROR_TYPE_DEBUG,
2454 "We received a sending delay of %s\n",
2455 GNUNET_STRINGS_relative_time_to_string (flow_delay,
2457 s->flow_delay_from_other_peer = GNUNET_TIME_relative_to_absolute (flow_delay);
2459 ack = (const struct GNUNET_MessageHeader *) &udp_ack[1];
2460 if (ntohs (ack->size) != ntohs (msg->size) - sizeof(struct UDP_ACK_Message))
2467 GNUNET_FRAGMENT_process_ack (s->frag_ctx->frag,
2470 LOG(GNUNET_ERROR_TYPE_DEBUG,
2471 "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
2472 (unsigned int ) ntohs (msg->size),
2473 GNUNET_i2s (&udp_ack->sender),
2474 udp_address_to_string (plugin,
2477 /* Expect more ACKs to arrive */
2481 LOG (GNUNET_ERROR_TYPE_DEBUG,
2482 "Message full ACK'ed\n",
2483 (unsigned int ) ntohs (msg->size),
2484 GNUNET_i2s (&udp_ack->sender),
2485 udp_address_to_string (plugin,
2490 /* Remove fragmented message after successful sending */
2491 fragmented_message_done (s->frag_ctx,
2497 * We received a fragment, process it.
2499 * @param plugin our plugin
2500 * @param msg a message of type #GNUNET_MESSAGE_TYPE_FRAGMENT
2501 * @param udp_addr sender address
2502 * @param udp_addr_len number of bytes in @a udp_addr
2503 * @param network_type network type the address belongs to
2506 read_process_fragment (struct Plugin *plugin,
2507 const struct GNUNET_MessageHeader *msg,
2508 const union UdpAddress *udp_addr,
2509 size_t udp_addr_len,
2510 enum GNUNET_ATS_Network_Type network_type)
2512 struct DefragContext *d_ctx;
2513 struct GNUNET_TIME_Absolute now;
2514 struct FindReceiveContext frc;
2517 frc.udp_addr = udp_addr;
2518 frc.udp_addr_len = udp_addr_len;
2520 /* Lookup existing receive context for this address */
2521 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
2522 &find_receive_context,
2524 now = GNUNET_TIME_absolute_get ();
2529 /* Create a new defragmentation context */
2530 d_ctx = GNUNET_malloc (sizeof (struct DefragContext) + udp_addr_len);
2534 d_ctx->udp_addr = (const union UdpAddress *) &d_ctx[1];
2535 d_ctx->udp_addr_len = udp_addr_len;
2536 d_ctx->network_type = network_type;
2537 d_ctx->plugin = plugin;
2538 d_ctx->defrag = GNUNET_DEFRAGMENT_context_create (plugin->env->stats,
2540 UDP_MAX_MESSAGES_IN_DEFRAG,
2544 d_ctx->hnode = GNUNET_CONTAINER_heap_insert (plugin->defrag_ctxs,
2546 (GNUNET_CONTAINER_HeapCostType) now.abs_value_us);
2547 LOG (GNUNET_ERROR_TYPE_DEBUG,
2548 "Created new defragmentation context for %u-byte fragment from `%s'\n",
2549 (unsigned int ) ntohs (msg->size),
2550 udp_address_to_string (plugin,
2556 LOG (GNUNET_ERROR_TYPE_DEBUG,
2557 "Found existing defragmentation context for %u-byte fragment from `%s'\n",
2558 (unsigned int ) ntohs (msg->size),
2559 udp_address_to_string (plugin,
2565 GNUNET_DEFRAGMENT_process_fragment (d_ctx->defrag, msg))
2567 /* keep this 'rc' from expiring */
2568 GNUNET_CONTAINER_heap_update_cost (plugin->defrag_ctxs,
2570 (GNUNET_CONTAINER_HeapCostType) now.abs_value_us);
2572 if (GNUNET_CONTAINER_heap_get_size (plugin->defrag_ctxs) >
2573 UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
2575 /* remove 'rc' that was inactive the longest */
2576 d_ctx = GNUNET_CONTAINER_heap_remove_root (plugin->defrag_ctxs);
2577 GNUNET_assert (NULL != d_ctx);
2578 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
2579 GNUNET_free (d_ctx);
2585 * Read and process a message from the given socket.
2587 * @param plugin the overall plugin
2588 * @param rsock socket to read from
2591 udp_select_read (struct Plugin *plugin,
2592 struct GNUNET_NETWORK_Handle *rsock)
2595 struct sockaddr_storage addr;
2596 char buf[65536] GNUNET_ALIGN;
2598 const struct GNUNET_MessageHeader *msg;
2599 struct IPv4UdpAddress v4;
2600 struct IPv6UdpAddress v6;
2601 const struct sockaddr *sa;
2602 const struct sockaddr_in *sa4;
2603 const struct sockaddr_in6 *sa6;
2604 const union UdpAddress *int_addr;
2605 size_t int_addr_len;
2606 enum GNUNET_ATS_Network_Type network_type;
2608 fromlen = sizeof(addr);
2609 memset (&addr, 0, sizeof(addr));
2610 size = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof(buf),
2611 (struct sockaddr *) &addr, &fromlen);
2612 sa = (const struct sockaddr *) &addr;
2614 /* On SOCK_DGRAM UDP sockets recvfrom might fail with a
2615 * WSAECONNRESET error to indicate that previous sendto() (yes, sendto!)
2616 * on this socket has failed.
2618 * WSAECONNRESET - The virtual circuit was reset by the remote side
2619 * executing a hard or abortive close. The application should close
2620 * the socket; it is no longer usable. On a UDP-datagram socket this
2621 * error indicates a previous send operation resulted in an ICMP Port
2622 * Unreachable message.
2624 if ( (-1 == size) && (ECONNRESET == errno) )
2629 LOG (GNUNET_ERROR_TYPE_DEBUG,
2630 "UDP failed to receive data: %s\n",
2632 /* Connection failure or something. Not a protocol violation. */
2635 if (size < sizeof(struct GNUNET_MessageHeader))
2637 LOG (GNUNET_ERROR_TYPE_WARNING,
2638 "UDP got %u bytes from %s, which is not enough for a GNUnet message header\n",
2639 (unsigned int ) size,
2640 GNUNET_a2s (sa, fromlen));
2641 /* _MAY_ be a connection failure (got partial message) */
2642 /* But it _MAY_ also be that the other side uses non-GNUnet protocol. */
2646 msg = (const struct GNUNET_MessageHeader *) buf;
2647 LOG (GNUNET_ERROR_TYPE_DEBUG,
2648 "UDP received %u-byte message from `%s' type %u\n",
2649 (unsigned int) size,
2653 if (size != ntohs (msg->size))
2655 LOG (GNUNET_ERROR_TYPE_WARNING,
2656 "UDP malformed message header from %s\n",
2657 (unsigned int) size,
2660 GNUNET_break_op (0);
2663 GNUNET_STATISTICS_update (plugin->env->stats,
2664 "# UDP, total, bytes, received",
2667 network_type = plugin->env->get_address_type (plugin->env->cls,
2670 switch (sa->sa_family)
2673 sa4 = (const struct sockaddr_in *) &addr;
2675 v4.ipv4_addr = sa4->sin_addr.s_addr;
2676 v4.u4_port = sa4->sin_port;
2677 int_addr = (union UdpAddress *) &v4;
2678 int_addr_len = sizeof (v4);
2681 sa6 = (const struct sockaddr_in6 *) &addr;
2683 v6.ipv6_addr = sa6->sin6_addr;
2684 v6.u6_port = sa6->sin6_port;
2685 int_addr = (union UdpAddress *) &v6;
2686 int_addr_len = sizeof (v6);
2693 switch (ntohs (msg->type))
2695 case GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON:
2696 if (GNUNET_YES == plugin->enable_broadcasting_receiving)
2697 udp_broadcast_receive (plugin,
2704 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
2705 if (ntohs (msg->size) < sizeof(struct UDPMessage))
2710 process_udp_message (plugin,
2711 (const struct UDPMessage *) msg,
2716 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
2717 read_process_ack (plugin,
2722 case GNUNET_MESSAGE_TYPE_FRAGMENT:
2723 read_process_fragment (plugin,
2739 static struct UDP_MessageWrapper *
2740 remove_timeout_messages_and_select (struct UDP_MessageWrapper *head,
2741 struct GNUNET_NETWORK_Handle *sock)
2743 struct UDP_MessageWrapper *udpw = NULL;
2744 struct GNUNET_TIME_Relative remaining;
2745 struct Session *session;
2746 struct Plugin *plugin;
2749 removed = GNUNET_NO;
2751 while (NULL != udpw)
2753 session = udpw->session;
2754 plugin = session->plugin;
2755 /* Find messages with timeout */
2756 remaining = GNUNET_TIME_absolute_get_remaining (udpw->timeout);
2757 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2759 /* Message timed out */
2760 switch (udpw->msg_type)
2762 case UMT_MSG_UNFRAGMENTED:
2763 GNUNET_STATISTICS_update (plugin->env->stats,
2764 "# UDP, total, bytes, sent, timeout",
2767 GNUNET_STATISTICS_update (plugin->env->stats,
2768 "# UDP, total, messages, sent, timeout",
2771 GNUNET_STATISTICS_update (plugin->env->stats,
2772 "# UDP, unfragmented msgs, messages, sent, timeout",
2775 GNUNET_STATISTICS_update (plugin->env->stats,
2776 "# UDP, unfragmented msgs, bytes, sent, timeout",
2779 /* Not fragmented message */
2780 LOG (GNUNET_ERROR_TYPE_DEBUG,
2781 "Message for peer `%s' with size %u timed out\n",
2782 GNUNET_i2s (&udpw->session->target),
2783 udpw->payload_size);
2784 call_continuation (udpw, GNUNET_SYSERR);
2785 /* Remove message */
2786 removed = GNUNET_YES;
2787 dequeue (plugin, udpw);
2790 case UMT_MSG_FRAGMENTED:
2791 /* Fragmented message */
2792 GNUNET_STATISTICS_update (plugin->env->stats,
2793 "# UDP, total, bytes, sent, timeout",
2794 udpw->frag_ctx->on_wire_size,
2796 GNUNET_STATISTICS_update (plugin->env->stats,
2797 "# UDP, total, messages, sent, timeout",
2800 call_continuation (udpw, GNUNET_SYSERR);
2801 LOG (GNUNET_ERROR_TYPE_DEBUG,
2802 "Fragment for message for peer `%s' with size %u timed out\n",
2803 GNUNET_i2s (&udpw->session->target),
2804 udpw->frag_ctx->payload_size);
2806 GNUNET_STATISTICS_update (plugin->env->stats,
2807 "# UDP, fragmented msgs, messages, sent, timeout",
2810 GNUNET_STATISTICS_update (plugin->env->stats,
2811 "# UDP, fragmented msgs, bytes, sent, timeout",
2812 udpw->frag_ctx->payload_size,
2814 /* Remove fragmented message due to timeout */
2815 fragmented_message_done (udpw->frag_ctx, GNUNET_SYSERR);
2818 GNUNET_STATISTICS_update (plugin->env->stats,
2819 "# UDP, total, bytes, sent, timeout",
2822 GNUNET_STATISTICS_update (plugin->env->stats,
2823 "# UDP, total, messages, sent, timeout",
2826 LOG (GNUNET_ERROR_TYPE_DEBUG,
2827 "ACK Message for peer `%s' with size %u timed out\n",
2828 GNUNET_i2s (&udpw->session->target),
2829 udpw->payload_size);
2830 call_continuation (udpw, GNUNET_SYSERR);
2831 removed = GNUNET_YES;
2832 dequeue (plugin, udpw);
2838 if (sock == plugin->sockv4)
2839 udpw = plugin->ipv4_queue_head;
2840 else if (sock == plugin->sockv6)
2841 udpw = plugin->ipv6_queue_head;
2844 GNUNET_break(0); /* should never happen */
2847 GNUNET_STATISTICS_update (plugin->env->stats,
2848 "# messages discarded due to timeout",
2854 /* Message did not time out, check flow delay */
2855 remaining = GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer);
2856 if (GNUNET_TIME_UNIT_ZERO.rel_value_us == remaining.rel_value_us)
2858 /* this message is not delayed */
2859 LOG (GNUNET_ERROR_TYPE_DEBUG,
2860 "Message for peer `%s' (%u bytes) is not delayed \n",
2861 GNUNET_i2s (&udpw->session->target),
2862 udpw->payload_size);
2863 break; /* Found message to send, break */
2867 /* Message is delayed, try next */
2868 LOG (GNUNET_ERROR_TYPE_DEBUG,
2869 "Message for peer `%s' (%u bytes) is delayed for %s\n",
2870 GNUNET_i2s (&udpw->session->target), udpw->payload_size,
2871 GNUNET_STRINGS_relative_time_to_string (remaining, GNUNET_YES));
2876 if (GNUNET_YES == removed)
2877 notify_session_monitor (session->plugin,
2879 GNUNET_TRANSPORT_SS_UPDATE);
2888 analyze_send_error (struct Plugin *plugin,
2889 const struct sockaddr *sa,
2890 socklen_t slen, int error)
2892 enum GNUNET_ATS_Network_Type type;
2894 type = plugin->env->get_address_type (plugin->env->cls, sa, slen);
2895 if (((GNUNET_ATS_NET_LAN == type)
2896 || (GNUNET_ATS_NET_WAN == type))
2897 && ((ENETUNREACH == errno)|| (ENETDOWN == errno)))
2899 if (slen == sizeof (struct sockaddr_in))
2901 /* IPv4: "Network unreachable" or "Network down"
2903 * This indicates we do not have connectivity
2905 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2906 _("UDP could not transmit message to `%s': "
2907 "Network seems down, please check your network configuration\n"),
2908 GNUNET_a2s (sa, slen));
2910 if (slen == sizeof (struct sockaddr_in6))
2912 /* IPv6: "Network unreachable" or "Network down"
2914 * This indicates that this system is IPv6 enabled, but does not
2915 * have a valid global IPv6 address assigned or we do not have
2918 LOG (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
2919 _("UDP could not transmit IPv6 message! "
2920 "Please check your network configuration and disable IPv6 if your "
2921 "connection does not have a global IPv6 address\n"));
2926 LOG (GNUNET_ERROR_TYPE_WARNING,
2927 "UDP could not transmit message to `%s': `%s'\n",
2928 GNUNET_a2s (sa, slen), STRERROR (error));
2937 udp_select_send (struct Plugin *plugin,
2938 struct GNUNET_NETWORK_Handle *sock)
2943 const struct IPv4UdpAddress *u4;
2944 struct sockaddr_in a4;
2945 const struct IPv6UdpAddress *u6;
2946 struct sockaddr_in6 a6;
2947 struct UDP_MessageWrapper *udpw;
2949 /* Find message to send */
2950 udpw = remove_timeout_messages_and_select ((sock == plugin->sockv4)
2951 ? plugin->ipv4_queue_head
2952 : plugin->ipv6_queue_head,
2955 return 0; /* No message to send */
2957 if (sizeof (struct IPv4UdpAddress) == udpw->session->address->address_length)
2959 u4 = udpw->session->address->address;
2960 memset (&a4, 0, sizeof(a4));
2961 a4.sin_family = AF_INET;
2962 #if HAVE_SOCKADDR_IN_SIN_LEN
2963 a4.sin_len = sizeof (a4);
2965 a4.sin_port = u4->u4_port;
2966 memcpy (&a4.sin_addr, &u4->ipv4_addr, sizeof(struct in_addr));
2967 a = (struct sockaddr *) &a4;
2970 else if (sizeof (struct IPv6UdpAddress) == udpw->session->address->address_length)
2972 u6 = udpw->session->address->address;
2973 memset (&a6, 0, sizeof(a6));
2974 a6.sin6_family = AF_INET6;
2975 #if HAVE_SOCKADDR_IN_SIN_LEN
2976 a6.sin6_len = sizeof (a6);
2978 a6.sin6_port = u6->u6_port;
2979 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof(struct in6_addr));
2980 a = (struct sockaddr *) &a6;
2985 call_continuation (udpw, GNUNET_OK);
2986 dequeue (plugin, udpw);
2987 notify_session_monitor (plugin,
2989 GNUNET_TRANSPORT_SS_UPDATE);
2991 return GNUNET_SYSERR;
2994 sent = GNUNET_NETWORK_socket_sendto (sock,
2999 if (GNUNET_SYSERR == sent)
3002 analyze_send_error (plugin, a, slen, errno);
3003 call_continuation (udpw, GNUNET_SYSERR);
3004 GNUNET_STATISTICS_update (plugin->env->stats,
3005 "# UDP, total, bytes, sent, failure", sent, GNUNET_NO);
3006 GNUNET_STATISTICS_update (plugin->env->stats,
3007 "# UDP, total, messages, sent, failure", 1, GNUNET_NO);
3012 LOG (GNUNET_ERROR_TYPE_DEBUG,
3013 "UDP transmitted %u-byte message to `%s' `%s' (%d: %s)\n",
3014 (unsigned int) (udpw->msg_size),
3015 GNUNET_i2s (&udpw->session->target),
3016 GNUNET_a2s (a, slen),
3018 (sent < 0) ? STRERROR (errno) : "ok");
3019 GNUNET_STATISTICS_update (plugin->env->stats,
3020 "# UDP, total, bytes, sent, success",
3023 GNUNET_STATISTICS_update (plugin->env->stats,
3024 "# UDP, total, messages, sent, success",
3027 if (NULL != udpw->frag_ctx)
3028 udpw->frag_ctx->on_wire_size += udpw->msg_size;
3029 call_continuation (udpw, GNUNET_OK);
3031 dequeue (plugin, udpw);
3032 notify_session_monitor (plugin,
3034 GNUNET_TRANSPORT_SS_UPDATE);
3041 * We have been notified that our readset has something to read. We don't
3042 * know which socket needs to be read, so we have to check each one
3043 * Then reschedule this function to be called again once more is available.
3045 * @param cls the plugin handle
3046 * @param tc the scheduling context (for rescheduling this function again)
3049 udp_plugin_select (void *cls,
3050 const struct GNUNET_SCHEDULER_TaskContext *tc)
3052 struct Plugin *plugin = cls;
3054 plugin->select_task = NULL;
3055 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3057 if ((0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
3058 && (NULL != plugin->sockv4)
3059 && (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv4)))
3060 udp_select_read (plugin, plugin->sockv4);
3061 if ((0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY))
3062 && (NULL != plugin->sockv4) && (NULL != plugin->ipv4_queue_head)
3063 && (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv4)))
3064 udp_select_send (plugin, plugin->sockv4);
3065 schedule_select (plugin);
3070 * We have been notified that our readset has something to read. We don't
3071 * know which socket needs to be read, so we have to check each one
3072 * Then reschedule this function to be called again once more is available.
3074 * @param cls the plugin handle
3075 * @param tc the scheduling context (for rescheduling this function again)
3078 udp_plugin_select_v6 (void *cls,
3079 const struct GNUNET_SCHEDULER_TaskContext *tc)
3081 struct Plugin *plugin = cls;
3083 plugin->select_task_v6 = NULL;
3084 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3086 if (((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0)
3087 && (NULL != plugin->sockv6)
3088 && (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv6)))
3089 udp_select_read (plugin, plugin->sockv6);
3090 if ((0 != (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY))
3091 && (NULL != plugin->sockv6) && (plugin->ipv6_queue_head != NULL )&&
3092 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv6)) )udp_select_send (plugin, plugin->sockv6);
3093 schedule_select (plugin);
3098 * Setup the UDP sockets (for IPv4 and IPv6) for the plugin.
3100 * @param plugin the plugin to initialize
3101 * @param bind_v6 IPv6 address to bind to (can be NULL, for 'any')
3102 * @param bind_v4 IPv4 address to bind to (can be NULL, for 'any')
3103 * @return number of sockets that were successfully bound
3106 setup_sockets (struct Plugin *plugin,
3107 const struct sockaddr_in6 *bind_v6,
3108 const struct sockaddr_in *bind_v4)
3111 int sockets_created = 0;
3112 struct sockaddr_in6 server_addrv6;
3113 struct sockaddr_in server_addrv4;
3114 struct sockaddr *server_addr;
3115 struct sockaddr *addrs[2];
3116 socklen_t addrlens[2];
3120 /* Create IPv6 socket */
3122 if (GNUNET_YES == plugin->enable_ipv6)
3124 plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
3125 if (NULL == plugin->sockv6)
3127 LOG(GNUNET_ERROR_TYPE_WARNING,
3128 "Disabling IPv6 since it is not supported on this system!\n");
3129 plugin->enable_ipv6 = GNUNET_NO;
3133 memset (&server_addrv6, '\0', sizeof(struct sockaddr_in6));
3134 #if HAVE_SOCKADDR_IN_SIN_LEN
3135 server_addrv6.sin6_len = sizeof (struct sockaddr_in6);
3137 server_addrv6.sin6_family = AF_INET6;
3138 if (NULL != bind_v6)
3139 server_addrv6.sin6_addr = bind_v6->sin6_addr;
3141 server_addrv6.sin6_addr = in6addr_any;
3143 if (0 == plugin->port) /* autodetect */
3144 server_addrv6.sin6_port
3145 = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537)
3148 server_addrv6.sin6_port = htons (plugin->port);
3149 addrlen = sizeof(struct sockaddr_in6);
3150 server_addr = (struct sockaddr *) &server_addrv6;
3155 LOG(GNUNET_ERROR_TYPE_DEBUG,
3156 "Binding to IPv6 `%s'\n",
3157 GNUNET_a2s (server_addr, addrlen));
3160 GNUNET_NETWORK_socket_bind (plugin->sockv6,
3165 if (0 != plugin->port)
3167 tries = 10; /* fail immediately */
3168 break; /* bind failed on specific port */
3171 server_addrv6.sin6_port
3172 = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537)
3178 GNUNET_NETWORK_socket_close (plugin->sockv6);
3179 plugin->enable_ipv6 = GNUNET_NO;
3180 plugin->sockv6 = NULL;
3184 plugin->port = ntohs (server_addrv6.sin6_port);
3186 if (NULL != plugin->sockv6)
3188 LOG (GNUNET_ERROR_TYPE_DEBUG,
3189 "IPv6 socket created on port %s\n",
3190 GNUNET_a2s (server_addr, addrlen));
3191 addrs[sockets_created] = (struct sockaddr *) &server_addrv6;
3192 addrlens[sockets_created] = sizeof(struct sockaddr_in6);
3197 LOG (GNUNET_ERROR_TYPE_ERROR,
3198 "Failed to bind UDP socket to %s: %s\n",
3199 GNUNET_a2s (server_addr, addrlen),
3205 /* Create IPv4 socket */
3207 plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
3208 if (NULL == plugin->sockv4)
3210 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
3212 LOG (GNUNET_ERROR_TYPE_WARNING,
3213 "Disabling IPv4 since it is not supported on this system!\n");
3214 plugin->enable_ipv4 = GNUNET_NO;
3218 memset (&server_addrv4, '\0', sizeof(struct sockaddr_in));
3219 #if HAVE_SOCKADDR_IN_SIN_LEN
3220 server_addrv4.sin_len = sizeof (struct sockaddr_in);
3222 server_addrv4.sin_family = AF_INET;
3223 if (NULL != bind_v4)
3224 server_addrv4.sin_addr = bind_v4->sin_addr;
3226 server_addrv4.sin_addr.s_addr = INADDR_ANY;
3228 if (0 == plugin->port)
3230 server_addrv4.sin_port
3231 = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG,
3235 server_addrv4.sin_port = htons (plugin->port);
3237 addrlen = sizeof(struct sockaddr_in);
3238 server_addr = (struct sockaddr *) &server_addrv4;
3243 LOG (GNUNET_ERROR_TYPE_DEBUG,
3244 "Binding to IPv4 `%s'\n",
3245 GNUNET_a2s (server_addr, addrlen));
3249 GNUNET_NETWORK_socket_bind (plugin->sockv4,
3254 if (0 != plugin->port)
3256 tries = 10; /* fail */
3257 break; /* bind failed on specific port */
3261 server_addrv4.sin_port
3262 = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537)
3268 GNUNET_NETWORK_socket_close (plugin->sockv4);
3269 plugin->enable_ipv4 = GNUNET_NO;
3270 plugin->sockv4 = NULL;
3274 plugin->port = ntohs (server_addrv4.sin_port);
3277 if (NULL != plugin->sockv4)
3279 LOG (GNUNET_ERROR_TYPE_DEBUG,
3280 "IPv4 socket created on port %s\n",
3281 GNUNET_a2s (server_addr, addrlen));
3282 addrs[sockets_created] = (struct sockaddr *) &server_addrv4;
3283 addrlens[sockets_created] = sizeof(struct sockaddr_in);
3288 LOG (GNUNET_ERROR_TYPE_ERROR,
3289 _("Failed to bind UDP socket to %s: %s\n"),
3290 GNUNET_a2s (server_addr, addrlen),
3295 if (0 == sockets_created)
3297 LOG (GNUNET_ERROR_TYPE_WARNING,
3298 _("Failed to open UDP sockets\n"));
3299 return 0; /* No sockets created, return */
3302 /* Create file descriptors */
3303 if (plugin->enable_ipv4 == GNUNET_YES)
3305 plugin->rs_v4 = GNUNET_NETWORK_fdset_create ();
3306 plugin->ws_v4 = GNUNET_NETWORK_fdset_create ();
3307 GNUNET_NETWORK_fdset_zero (plugin->rs_v4);
3308 GNUNET_NETWORK_fdset_zero (plugin->ws_v4);
3309 if (NULL != plugin->sockv4)
3311 GNUNET_NETWORK_fdset_set (plugin->rs_v4, plugin->sockv4);
3312 GNUNET_NETWORK_fdset_set (plugin->ws_v4, plugin->sockv4);
3316 if (plugin->enable_ipv6 == GNUNET_YES)
3318 plugin->rs_v6 = GNUNET_NETWORK_fdset_create ();
3319 plugin->ws_v6 = GNUNET_NETWORK_fdset_create ();
3320 GNUNET_NETWORK_fdset_zero (plugin->rs_v6);
3321 GNUNET_NETWORK_fdset_zero (plugin->ws_v6);
3322 if (NULL != plugin->sockv6)
3324 GNUNET_NETWORK_fdset_set (plugin->rs_v6, plugin->sockv6);
3325 GNUNET_NETWORK_fdset_set (plugin->ws_v6, plugin->sockv6);
3329 schedule_select (plugin);
3330 plugin->nat = GNUNET_NAT_register (plugin->env->cfg,
3334 (const struct sockaddr **) addrs,
3336 &udp_nat_port_map_callback,
3340 return sockets_created;
3345 * Return information about the given session to the
3348 * @param cls the `struct Plugin` with the monitor callback (`sic`)
3349 * @param peer peer we send information about
3350 * @param value our `struct Session` to send information about
3351 * @return #GNUNET_OK (continue to iterate)
3354 send_session_info_iter (void *cls,
3355 const struct GNUNET_PeerIdentity *peer,
3358 struct Plugin *plugin = cls;
3359 struct Session *session = value;
3361 notify_session_monitor (plugin,
3363 GNUNET_TRANSPORT_SS_INIT);
3364 notify_session_monitor (plugin,
3366 GNUNET_TRANSPORT_SS_UP);
3372 * Begin monitoring sessions of a plugin. There can only
3373 * be one active monitor per plugin (i.e. if there are
3374 * multiple monitors, the transport service needs to
3375 * multiplex the generated events over all of them).
3377 * @param cls closure of the plugin
3378 * @param sic callback to invoke, NULL to disable monitor;
3379 * plugin will being by iterating over all active
3380 * sessions immediately and then enter monitor mode
3381 * @param sic_cls closure for @a sic
3384 udp_plugin_setup_monitor (void *cls,
3385 GNUNET_TRANSPORT_SessionInfoCallback sic,
3388 struct Plugin *plugin = cls;
3391 plugin->sic_cls = sic_cls;
3394 GNUNET_CONTAINER_multipeermap_iterate (plugin->sessions,
3395 &send_session_info_iter,
3397 /* signal end of first iteration */
3398 sic (sic_cls, NULL, NULL);
3404 * The exported method. Makes the core api available via a global and
3405 * returns the udp transport API.
3407 * @param cls our `struct GNUNET_TRANSPORT_PluginEnvironment`
3408 * @return our `struct GNUNET_TRANSPORT_PluginFunctions`
3411 libgnunet_plugin_transport_udp_init (void *cls)
3413 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
3414 struct GNUNET_TRANSPORT_PluginFunctions *api;
3416 unsigned long long port;
3417 unsigned long long aport;
3418 unsigned long long udp_max_bps;
3419 unsigned long long enable_v6;
3420 unsigned long long enable_broadcasting;
3421 unsigned long long enable_broadcasting_recv;
3422 char *bind4_address;
3423 char *bind6_address;
3424 char *fancy_interval;
3425 struct GNUNET_TIME_Relative interval;
3426 struct sockaddr_in server_addrv4;
3427 struct sockaddr_in6 server_addrv6;
3432 if (NULL == env->receive)
3434 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
3435 initialze the plugin or the API */
3436 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
3438 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3439 api->address_to_string = &udp_address_to_string;
3440 api->string_to_address = &udp_string_to_address;
3444 /* Get port number: port == 0 : autodetect a port,
3445 * > 0 : use this port, not given : 2086 default */
3447 GNUNET_CONFIGURATION_get_value_number (env->cfg,
3452 GNUNET_CONFIGURATION_get_value_number (env->cfg,
3454 "ADVERTISED_PORT", &aport))
3458 LOG (GNUNET_ERROR_TYPE_WARNING,
3459 _("Given `%s' option is out of range: %llu > %u\n"),
3467 GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "nat", "DISABLEV6"))
3468 enable_v6 = GNUNET_NO;
3470 enable_v6 = GNUNET_YES;
3473 have_bind4 = GNUNET_NO;
3474 memset (&server_addrv4, 0, sizeof(server_addrv4));
3476 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3477 "BINDTO", &bind4_address))
3479 LOG (GNUNET_ERROR_TYPE_DEBUG,
3480 "Binding udp plugin to specific address: `%s'\n",
3482 if (1 != inet_pton (AF_INET,
3484 &server_addrv4.sin_addr))
3486 GNUNET_free (bind4_address);
3489 have_bind4 = GNUNET_YES;
3491 GNUNET_free_non_null(bind4_address);
3492 have_bind6 = GNUNET_NO;
3493 memset (&server_addrv6, 0, sizeof(server_addrv6));
3495 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3496 "BINDTO6", &bind6_address))
3498 LOG (GNUNET_ERROR_TYPE_DEBUG,
3499 "Binding udp plugin to specific address: `%s'\n",
3501 if (1 != inet_pton (AF_INET6,
3503 &server_addrv6.sin6_addr))
3505 LOG (GNUNET_ERROR_TYPE_ERROR,
3506 _("Invalid IPv6 address: `%s'\n"),
3508 GNUNET_free (bind6_address);
3511 have_bind6 = GNUNET_YES;
3513 GNUNET_free_non_null (bind6_address);
3515 /* Enable neighbour discovery */
3516 enable_broadcasting = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
3517 "transport-udp", "BROADCAST");
3518 if (enable_broadcasting == GNUNET_SYSERR)
3519 enable_broadcasting = GNUNET_NO;
3521 enable_broadcasting_recv = GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
3522 "transport-udp", "BROADCAST_RECEIVE");
3523 if (enable_broadcasting_recv == GNUNET_SYSERR)
3524 enable_broadcasting_recv = GNUNET_YES;
3526 if (GNUNET_SYSERR ==
3527 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
3528 "BROADCAST_INTERVAL",
3531 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
3535 if (GNUNET_SYSERR ==
3536 GNUNET_STRINGS_fancy_time_to_relative (fancy_interval, &interval))
3538 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30);
3540 GNUNET_free(fancy_interval);
3543 /* Maximum datarate */
3545 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
3546 "MAX_BPS", &udp_max_bps))
3548 udp_max_bps = 1024 * 1024 * 50; /* 50 MB/s == infinity for practical purposes */
3551 p = GNUNET_new (struct Plugin);
3554 p->broadcast_interval = interval;
3555 p->enable_ipv6 = enable_v6;
3556 p->enable_ipv4 = GNUNET_YES; /* default */
3557 p->enable_broadcasting = enable_broadcasting;
3558 p->enable_broadcasting_receiving = enable_broadcasting_recv;
3560 p->sessions = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
3561 p->defrag_ctxs = GNUNET_CONTAINER_heap_create (
3562 GNUNET_CONTAINER_HEAP_ORDER_MIN);
3563 p->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages,
3565 GNUNET_BANDWIDTH_tracker_init (&p->tracker,
3568 GNUNET_BANDWIDTH_value_init ((uint32_t) udp_max_bps),
3570 LOG(GNUNET_ERROR_TYPE_DEBUG,
3571 "Setting up sockets\n");
3572 res = setup_sockets (p,
3573 (GNUNET_YES == have_bind6) ? &server_addrv6 : NULL,
3574 (GNUNET_YES == have_bind4) ? &server_addrv4 : NULL);
3575 if ((res == 0) || ((p->sockv4 == NULL )&& (p->sockv6 == NULL)))
3577 LOG (GNUNET_ERROR_TYPE_ERROR,
3578 _("Failed to create network sockets, plugin failed\n"));
3579 GNUNET_CONTAINER_multipeermap_destroy (p->sessions);
3580 GNUNET_CONTAINER_heap_destroy (p->defrag_ctxs);
3581 GNUNET_SERVER_mst_destroy (p->mst);
3586 /* Setup broadcasting and receiving beacons */
3587 setup_broadcast (p, &server_addrv6, &server_addrv4);
3589 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
3592 api->disconnect_session = &udp_disconnect_session;
3593 api->query_keepalive_factor = &udp_query_keepalive_factor;
3594 api->disconnect_peer = &udp_disconnect;
3595 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
3596 api->address_to_string = &udp_address_to_string;
3597 api->string_to_address = &udp_string_to_address;
3598 api->check_address = &udp_plugin_check_address;
3599 api->get_session = &udp_plugin_get_session;
3600 api->send = &udp_plugin_send;
3601 api->get_network = &udp_get_network;
3602 api->update_session_timeout = &udp_plugin_update_session_timeout;
3603 api->setup_monitor = &udp_plugin_setup_monitor;
3609 * Function called on each entry in the defragmentation heap to
3613 * @param node node in the heap (to be removed)
3614 * @param element a `struct DefragContext` to be cleaned up
3615 * @param cost unused
3616 * @return #GNUNET_YES
3619 heap_cleanup_iterator (void *cls,
3620 struct GNUNET_CONTAINER_HeapNode *node,
3622 GNUNET_CONTAINER_HeapCostType cost)
3624 struct DefragContext *d_ctx = element;
3626 GNUNET_CONTAINER_heap_remove_node (node);
3627 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
3628 GNUNET_free (d_ctx);
3634 * The exported method. Makes the core api available via a global and
3635 * returns the udp transport API.
3637 * @param cls our `struct GNUNET_TRANSPORT_PluginEnvironment`
3641 libgnunet_plugin_transport_udp_done (void *cls)
3643 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
3644 struct Plugin *plugin = api->cls;
3645 struct PrettyPrinterContext *cur;
3646 struct PrettyPrinterContext *next;
3647 struct UDP_MessageWrapper *udpw;
3654 stop_broadcast (plugin);
3655 if (plugin->select_task != NULL)
3657 GNUNET_SCHEDULER_cancel (plugin->select_task);
3658 plugin->select_task = NULL;
3660 if (plugin->select_task_v6 != NULL)
3662 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
3663 plugin->select_task_v6 = NULL;
3666 /* Closing sockets */
3667 if (GNUNET_YES == plugin->enable_ipv4)
3669 if (NULL != plugin->sockv4)
3671 GNUNET_break (GNUNET_OK ==
3672 GNUNET_NETWORK_socket_close (plugin->sockv4));
3673 plugin->sockv4 = NULL;
3675 GNUNET_NETWORK_fdset_destroy (plugin->rs_v4);
3676 GNUNET_NETWORK_fdset_destroy (plugin->ws_v4);
3678 if (GNUNET_YES == plugin->enable_ipv6)
3680 if (NULL != plugin->sockv6)
3682 GNUNET_break (GNUNET_OK ==
3683 GNUNET_NETWORK_socket_close (plugin->sockv6));
3684 plugin->sockv6 = NULL;
3686 GNUNET_NETWORK_fdset_destroy (plugin->rs_v6);
3687 GNUNET_NETWORK_fdset_destroy (plugin->ws_v6);
3690 if (NULL != plugin->nat)
3692 GNUNET_NAT_unregister (plugin->nat);
3695 if (NULL != plugin->defrag_ctxs)
3697 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
3698 &heap_cleanup_iterator, NULL);
3699 GNUNET_CONTAINER_heap_destroy (plugin->defrag_ctxs);
3700 plugin->defrag_ctxs = NULL;
3702 if (NULL != plugin->mst)
3704 GNUNET_SERVER_mst_destroy (plugin->mst);
3708 /* Clean up leftover messages */
3709 udpw = plugin->ipv4_queue_head;
3710 while (NULL != udpw)
3712 struct UDP_MessageWrapper *tmp = udpw->next;
3713 dequeue (plugin, udpw);
3714 call_continuation (udpw, GNUNET_SYSERR);
3718 udpw = plugin->ipv6_queue_head;
3719 while (NULL != udpw)
3721 struct UDP_MessageWrapper *tmp = udpw->next;
3722 dequeue (plugin, udpw);
3723 call_continuation (udpw, GNUNET_SYSERR);
3728 /* Clean up sessions */
3729 LOG (GNUNET_ERROR_TYPE_DEBUG,
3730 "Cleaning up sessions\n");
3731 GNUNET_CONTAINER_multipeermap_iterate (plugin->sessions,
3732 &disconnect_and_free_it, plugin);
3733 GNUNET_CONTAINER_multipeermap_destroy (plugin->sessions);
3735 next = plugin->ppc_dll_head;
3736 for (cur = next; NULL != cur; cur = next)
3740 GNUNET_CONTAINER_DLL_remove (plugin->ppc_dll_head,
3741 plugin->ppc_dll_tail,
3743 GNUNET_RESOLVER_request_cancel (cur->resolver_handle);
3746 GNUNET_free (plugin);
3751 /* end of plugin_transport_udp.c */