2 This file is part of GNUnet
3 (C) 2010, 2011 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
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13 General Public License for more details.
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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
68 * Closure for 'append_port'.
70 struct PrettyPrinterContext
73 * Function to call with the result.
75 GNUNET_TRANSPORT_AddressStringCallback asc;
83 * Port to add after the IP address.
92 * Which peer is this session for?
94 struct GNUNET_PeerIdentity target;
96 struct FragmentationContext * frag_ctx;
99 * Address of the other peer
101 const struct sockaddr *sock_addr;
104 * Desired delay for next sending we send to other peer
106 struct GNUNET_TIME_Relative flow_delay_for_other_peer;
109 * Desired delay for next sending we received from other peer
111 struct GNUNET_TIME_Absolute flow_delay_from_other_peer;
114 * Session timeout task
116 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
119 * expected delay for ACKs
121 struct GNUNET_TIME_Relative last_expected_delay;
123 struct GNUNET_ATS_Information ats;
134 struct SessionCompareContext
137 const struct GNUNET_HELLO_Address *addr;
142 * Closure for 'process_inbound_tokenized_messages'
144 struct SourceInformation
149 struct GNUNET_PeerIdentity sender;
156 struct Session *session;
158 * Number of bytes in source address.
166 * Closure for 'find_receive_context'.
168 struct FindReceiveContext
171 * Where to store the result.
173 struct DefragContext *rc;
178 const struct sockaddr *addr;
180 struct Session *session;
183 * Number of bytes in 'addr'.
192 * Data structure to track defragmentation contexts based
193 * on the source of the UDP traffic.
199 * Defragmentation context.
201 struct GNUNET_DEFRAGMENT_Context *defrag;
204 * Source address this receive context is for (allocated at the
205 * end of the struct).
207 const struct sockaddr *src_addr;
210 * Reference to master plugin struct.
212 struct Plugin *plugin;
215 * Node in the defrag heap.
217 struct GNUNET_CONTAINER_HeapNode *hnode;
220 * Length of 'src_addr'
228 * Closure for 'process_inbound_tokenized_messages'
230 struct FragmentationContext
232 struct FragmentationContext * next;
233 struct FragmentationContext * prev;
235 struct Plugin * plugin;
236 struct GNUNET_FRAGMENT_Context * frag;
237 struct Session * session;
240 * Function to call upon completion of the transmission.
242 GNUNET_TRANSPORT_TransmitContinuation cont;
245 * Closure for 'cont'.
249 struct GNUNET_TIME_Absolute timeout;
251 size_t bytes_to_send;
255 struct UDPMessageWrapper
257 struct Session *session;
258 struct UDPMessageWrapper *prev;
259 struct UDPMessageWrapper *next;
263 * Function to call upon completion of the transmission.
265 GNUNET_TRANSPORT_TransmitContinuation cont;
268 * Closure for 'cont'.
272 struct FragmentationContext *frag_ctx;
276 struct GNUNET_TIME_Absolute timeout;
281 * UDP ACK Message-Packet header (after defragmentation).
283 struct UDP_ACK_Message
288 struct GNUNET_MessageHeader header;
291 * Desired delay for flow control
296 * What is the identity of the sender
298 struct GNUNET_PeerIdentity sender;
303 * Encapsulation of all of the state of the plugin.
305 struct Plugin * plugin;
309 * We have been notified that our readset has something to read. We don't
310 * know which socket needs to be read, so we have to check each one
311 * Then reschedule this function to be called again once more is available.
313 * @param cls the plugin handle
314 * @param tc the scheduling context (for rescheduling this function again)
317 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
321 * We have been notified that our readset has something to read. We don't
322 * know which socket needs to be read, so we have to check each one
323 * Then reschedule this function to be called again once more is available.
325 * @param cls the plugin handle
326 * @param tc the scheduling context (for rescheduling this function again)
329 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
333 * Start session timeout
336 start_session_timeout (struct Session *s);
339 * Increment session timeout due to activity
342 reschedule_session_timeout (struct Session *s);
348 stop_session_timeout (struct Session *s);
353 * Function called for a quick conversion of the binary address to
354 * a numeric address. Note that the caller must not free the
355 * address and that the next call to this function is allowed
356 * to override the address again.
359 * @param addr binary address
360 * @param addrlen length of the address
361 * @return string representing the same address
364 udp_address_to_string (void *cls, const void *addr, size_t addrlen)
366 static char rbuf[INET6_ADDRSTRLEN + 10];
367 char buf[INET6_ADDRSTRLEN];
371 const struct IPv4UdpAddress *t4;
372 const struct IPv6UdpAddress *t6;
376 if (addrlen == sizeof (struct IPv6UdpAddress))
380 port = ntohs (t6->u6_port);
381 memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
384 else if (addrlen == sizeof (struct IPv4UdpAddress))
388 port = ntohs (t4->u4_port);
389 memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
397 inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
398 GNUNET_snprintf (rbuf, sizeof (rbuf), (af == AF_INET6) ? "[%s]:%u" : "%s:%u",
405 * Function called to convert a string address to
408 * @param cls closure ('struct Plugin*')
409 * @param addr string address
410 * @param addrlen length of the address
411 * @param buf location to store the buffer
412 * @param added location to store the number of bytes in the buffer.
413 * If the function returns GNUNET_SYSERR, its contents are undefined.
414 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
417 udp_string_to_address (void *cls, const char *addr, uint16_t addrlen,
418 void **buf, size_t *added)
420 struct sockaddr_storage socket_address;
422 if ((NULL == addr) || (0 == addrlen))
425 return GNUNET_SYSERR;
428 if ('\0' != addr[addrlen - 1])
430 return GNUNET_SYSERR;
433 if (strlen (addr) != addrlen - 1)
435 return GNUNET_SYSERR;
438 if (GNUNET_OK != GNUNET_STRINGS_to_address_ip (addr, strlen (addr),
441 return GNUNET_SYSERR;
444 switch (socket_address.ss_family)
448 struct IPv4UdpAddress *u4;
449 struct sockaddr_in *in4 = (struct sockaddr_in *) &socket_address;
450 u4 = GNUNET_malloc (sizeof (struct IPv4UdpAddress));
451 u4->ipv4_addr = in4->sin_addr.s_addr;
452 u4->u4_port = in4->sin_port;
454 *added = sizeof (struct IPv4UdpAddress);
459 struct IPv6UdpAddress *u6;
460 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) &socket_address;
461 u6 = GNUNET_malloc (sizeof (struct IPv6UdpAddress));
462 u6->ipv6_addr = in6->sin6_addr;
463 u6->u6_port = in6->sin6_port;
465 *added = sizeof (struct IPv6UdpAddress);
470 return GNUNET_SYSERR;
476 * Append our port and forward the result.
478 * @param cls a 'struct PrettyPrinterContext'
479 * @param hostname result from DNS resolver
482 append_port (void *cls, const char *hostname)
484 struct PrettyPrinterContext *ppc = cls;
487 if (hostname == NULL)
489 ppc->asc (ppc->asc_cls, NULL);
493 GNUNET_asprintf (&ret, "%s:%d", hostname, ppc->port);
494 ppc->asc (ppc->asc_cls, ret);
500 * Convert the transports address to a nice, human-readable
504 * @param type name of the transport that generated the address
505 * @param addr one of the addresses of the host, NULL for the last address
506 * the specific address format depends on the transport
507 * @param addrlen length of the address
508 * @param numeric should (IP) addresses be displayed in numeric form?
509 * @param timeout after how long should we give up?
510 * @param asc function to call on each string
511 * @param asc_cls closure for asc
514 udp_plugin_address_pretty_printer (void *cls, const char *type,
515 const void *addr, size_t addrlen,
517 struct GNUNET_TIME_Relative timeout,
518 GNUNET_TRANSPORT_AddressStringCallback asc,
521 struct PrettyPrinterContext *ppc;
524 struct sockaddr_in a4;
525 struct sockaddr_in6 a6;
526 const struct IPv4UdpAddress *u4;
527 const struct IPv6UdpAddress *u6;
530 if (addrlen == sizeof (struct IPv6UdpAddress))
533 memset (&a6, 0, sizeof (a6));
534 a6.sin6_family = AF_INET6;
535 #if HAVE_SOCKADDR_IN_SIN_LEN
536 a6.sin6_len = sizeof (a6);
538 a6.sin6_port = u6->u6_port;
539 memcpy (&a6.sin6_addr, &u6->ipv6_addr, sizeof (struct in6_addr));
540 port = ntohs (u6->u6_port);
544 else if (addrlen == sizeof (struct IPv4UdpAddress))
547 memset (&a4, 0, sizeof (a4));
548 a4.sin_family = AF_INET;
549 #if HAVE_SOCKADDR_IN_SIN_LEN
550 a4.sin_len = sizeof (a4);
552 a4.sin_port = u4->u4_port;
553 a4.sin_addr.s_addr = u4->ipv4_addr;
554 port = ntohs (u4->u4_port);
558 else if (0 == addrlen)
560 asc (asc_cls, "<inbound connection>");
566 /* invalid address */
571 ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
573 ppc->asc_cls = asc_cls;
575 GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric, timeout, &append_port, ppc);
580 call_continuation (struct UDPMessageWrapper *udpw, int result)
582 LOG (GNUNET_ERROR_TYPE_DEBUG,
583 "Calling continuation for %u byte message to `%s' with result %s\n",
584 udpw->msg_size, GNUNET_i2s (&udpw->session->target),
585 (GNUNET_OK == result) ? "OK" : "SYSERR");
586 if (NULL != udpw->cont)
588 udpw->cont (udpw->cont_cls, &udpw->session->target,result);
595 * Check if the given port is plausible (must be either our listen
596 * port or our advertised port). If it is neither, we return
599 * @param plugin global variables
600 * @param in_port port number to check
601 * @return GNUNET_OK if port is either open_port or adv_port
604 check_port (struct Plugin *plugin, uint16_t in_port)
606 if ((in_port == plugin->port) || (in_port == plugin->aport))
608 return GNUNET_SYSERR;
613 * Function that will be called to check if a binary address for this
614 * plugin is well-formed and corresponds to an address for THIS peer
615 * (as per our configuration). Naturally, if absolutely necessary,
616 * plugins can be a bit conservative in their answer, but in general
617 * plugins should make sure that the address does not redirect
618 * traffic to a 3rd party that might try to man-in-the-middle our
621 * @param cls closure, should be our handle to the Plugin
622 * @param addr pointer to the address
623 * @param addrlen length of addr
624 * @return GNUNET_OK if this is a plausible address for this peer
625 * and transport, GNUNET_SYSERR if not
629 udp_plugin_check_address (void *cls, const void *addr, size_t addrlen)
631 struct Plugin *plugin = cls;
632 struct IPv4UdpAddress *v4;
633 struct IPv6UdpAddress *v6;
635 if ((addrlen != sizeof (struct IPv4UdpAddress)) &&
636 (addrlen != sizeof (struct IPv6UdpAddress)))
639 return GNUNET_SYSERR;
641 if (addrlen == sizeof (struct IPv4UdpAddress))
643 v4 = (struct IPv4UdpAddress *) addr;
644 if (GNUNET_OK != check_port (plugin, ntohs (v4->u4_port)))
645 return GNUNET_SYSERR;
647 GNUNET_NAT_test_address (plugin->nat, &v4->ipv4_addr,
648 sizeof (struct in_addr)))
649 return GNUNET_SYSERR;
653 v6 = (struct IPv6UdpAddress *) addr;
654 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
657 return GNUNET_SYSERR;
659 if (GNUNET_OK != check_port (plugin, ntohs (v6->u6_port)))
660 return GNUNET_SYSERR;
662 GNUNET_NAT_test_address (plugin->nat, &v6->ipv6_addr,
663 sizeof (struct in6_addr)))
664 return GNUNET_SYSERR;
671 * Task to free resources associated with a session.
673 * @param s session to free
676 free_session (struct Session *s)
678 if (s->frag_ctx != NULL)
680 GNUNET_FRAGMENT_context_destroy(s->frag_ctx->frag);
681 GNUNET_free (s->frag_ctx);
689 * Functions with this signature are called whenever we need
690 * to close a session due to a disconnect or failure to
691 * establish a connection.
693 * @param s session to close down
696 disconnect_session (struct Session *s)
698 struct UDPMessageWrapper *udpw;
699 struct UDPMessageWrapper *next;
701 GNUNET_assert (GNUNET_YES != s->in_destroy);
702 LOG (GNUNET_ERROR_TYPE_DEBUG,
703 "Session %p to peer `%s' address ended \n",
705 GNUNET_i2s (&s->target),
706 GNUNET_a2s (s->sock_addr, s->addrlen));
707 stop_session_timeout(s);
708 next = plugin->ipv4_queue_head;
709 while (NULL != (udpw = next))
712 if (udpw->session == s)
714 GNUNET_CONTAINER_DLL_remove(plugin->ipv4_queue_head, plugin->ipv4_queue_tail, udpw);
715 call_continuation(udpw, GNUNET_SYSERR);
719 next = plugin->ipv6_queue_head;
720 while (NULL != (udpw = next))
723 if (udpw->session == s)
725 GNUNET_CONTAINER_DLL_remove(plugin->ipv6_queue_head, plugin->ipv6_queue_tail, udpw);
726 call_continuation(udpw, GNUNET_SYSERR);
731 plugin->env->session_end (plugin->env->cls, &s->target, s);
733 if (NULL != s->frag_ctx)
735 if (NULL != s->frag_ctx->cont)
737 s->frag_ctx->cont (s->frag_ctx->cont_cls, &s->target, GNUNET_SYSERR);
738 LOG (GNUNET_ERROR_TYPE_DEBUG,
739 "Calling continuation for fragemented message to `%s' with result SYSERR\n",
740 GNUNET_i2s (&s->target));
744 GNUNET_assert (GNUNET_YES ==
745 GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
746 &s->target.hashPubKey,
748 GNUNET_STATISTICS_set(plugin->env->stats,
749 "# UDP sessions active",
750 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
753 s->in_destroy = GNUNET_YES;
759 * Destroy a session, plugin is being unloaded.
762 * @param key hash of public key of target peer
763 * @param value a 'struct PeerSession*' to clean up
764 * @return GNUNET_OK (continue to iterate)
767 disconnect_and_free_it (void *cls, const GNUNET_HashCode * key, void *value)
769 disconnect_session(value);
775 * Disconnect from a remote node. Clean up session if we have one for this peer
777 * @param cls closure for this call (should be handle to Plugin)
778 * @param target the peeridentity of the peer to disconnect
779 * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
782 udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
784 struct Plugin *plugin = cls;
785 GNUNET_assert (plugin != NULL);
787 GNUNET_assert (target != NULL);
788 LOG (GNUNET_ERROR_TYPE_DEBUG,
789 "Disconnecting from peer `%s'\n", GNUNET_i2s (target));
790 /* Clean up sessions */
791 GNUNET_CONTAINER_multihashmap_get_multiple (plugin->sessions, &target->hashPubKey, &disconnect_and_free_it, plugin);
795 static struct Session *
796 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
797 const void *addr, size_t addrlen,
798 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
801 const struct IPv4UdpAddress *t4;
802 const struct IPv6UdpAddress *t6;
803 struct sockaddr_in *v4;
804 struct sockaddr_in6 *v6;
809 case sizeof (struct IPv4UdpAddress):
810 if (NULL == plugin->sockv4)
815 s = GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in));
816 len = sizeof (struct sockaddr_in);
817 v4 = (struct sockaddr_in *) &s[1];
818 v4->sin_family = AF_INET;
819 #if HAVE_SOCKADDR_IN_SIN_LEN
820 v4->sin_len = sizeof (struct sockaddr_in);
822 v4->sin_port = t4->u4_port;
823 v4->sin_addr.s_addr = t4->ipv4_addr;
824 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v4, sizeof (struct sockaddr_in));
826 case sizeof (struct IPv6UdpAddress):
827 if (NULL == plugin->sockv6)
833 GNUNET_malloc (sizeof (struct Session) + sizeof (struct sockaddr_in6));
834 len = sizeof (struct sockaddr_in6);
835 v6 = (struct sockaddr_in6 *) &s[1];
836 v6->sin6_family = AF_INET6;
837 #if HAVE_SOCKADDR_IN_SIN_LEN
838 v6->sin6_len = sizeof (struct sockaddr_in6);
840 v6->sin6_port = t6->u6_port;
841 v6->sin6_addr = t6->ipv6_addr;
842 s->ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) v6, sizeof (struct sockaddr_in6));
845 /* Must have a valid address to send to */
851 s->sock_addr = (const struct sockaddr *) &s[1];
852 s->last_expected_delay = GNUNET_TIME_UNIT_SECONDS;
853 start_session_timeout(s);
859 session_cmp_it (void *cls,
860 const GNUNET_HashCode * key,
863 struct SessionCompareContext * cctx = cls;
864 const struct GNUNET_HELLO_Address *address = cctx->addr;
865 struct Session *s = value;
867 socklen_t s_addrlen = s->addrlen;
869 LOG (GNUNET_ERROR_TYPE_DEBUG, "Comparing address %s <-> %s\n",
870 udp_address_to_string (NULL, (void *) address->address, address->address_length),
871 GNUNET_a2s (s->sock_addr, s->addrlen));
872 if ((address->address_length == sizeof (struct IPv4UdpAddress)) &&
873 (s_addrlen == sizeof (struct sockaddr_in)))
875 struct IPv4UdpAddress * u4 = NULL;
876 u4 = (struct IPv4UdpAddress *) address->address;
877 const struct sockaddr_in *s4 = (const struct sockaddr_in *) s->sock_addr;
878 if ((0 == memcmp ((const void *) &u4->ipv4_addr,(const void *) &s4->sin_addr, sizeof (struct in_addr))) &&
879 (u4->u4_port == s4->sin_port))
886 if ((address->address_length == sizeof (struct IPv6UdpAddress)) &&
887 (s_addrlen == sizeof (struct sockaddr_in6)))
889 struct IPv6UdpAddress * u6 = NULL;
890 u6 = (struct IPv6UdpAddress *) address->address;
891 const struct sockaddr_in6 *s6 = (const struct sockaddr_in6 *) s->sock_addr;
892 if ((0 == memcmp (&u6->ipv6_addr, &s6->sin6_addr, sizeof (struct in6_addr))) &&
893 (u6->u6_port == s6->sin6_port))
904 * Creates a new outbound session the transport service will use to send data to the
907 * @param cls the plugin
908 * @param address the address
909 * @return the session or NULL of max connections exceeded
911 static struct Session *
912 udp_plugin_get_session (void *cls,
913 const struct GNUNET_HELLO_Address *address)
915 struct Session * s = NULL;
916 struct Plugin * plugin = cls;
917 struct IPv6UdpAddress * udp_a6;
918 struct IPv4UdpAddress * udp_a4;
920 GNUNET_assert (plugin != NULL);
921 GNUNET_assert (address != NULL);
924 if ((address->address == NULL) ||
925 ((address->address_length != sizeof (struct IPv4UdpAddress)) &&
926 (address->address_length != sizeof (struct IPv6UdpAddress))))
932 if (address->address_length == sizeof (struct IPv4UdpAddress))
934 if (plugin->sockv4 == NULL)
936 udp_a4 = (struct IPv4UdpAddress *) address->address;
937 if (udp_a4->u4_port == 0)
941 if (address->address_length == sizeof (struct IPv6UdpAddress))
943 if (plugin->sockv6 == NULL)
945 udp_a6 = (struct IPv6UdpAddress *) address->address;
946 if (udp_a6->u6_port == 0)
950 /* check if session already exists */
951 struct SessionCompareContext cctx;
954 LOG (GNUNET_ERROR_TYPE_DEBUG,
955 "Looking for existing session for peer `%s' `%s' \n",
956 GNUNET_i2s (&address->peer),
957 udp_address_to_string(NULL, address->address, address->address_length));
958 GNUNET_CONTAINER_multihashmap_get_multiple(plugin->sessions, &address->peer.hashPubKey, session_cmp_it, &cctx);
959 if (cctx.res != NULL)
961 LOG (GNUNET_ERROR_TYPE_DEBUG, "Found existing session %p\n", cctx.res);
965 /* otherwise create new */
966 s = create_session (plugin,
969 address->address_length,
971 LOG (GNUNET_ERROR_TYPE_DEBUG,
972 "Creating new session %p for peer `%s' address `%s'\n",
974 GNUNET_i2s(&address->peer),
975 udp_address_to_string(NULL,address->address,address->address_length));
976 GNUNET_assert (GNUNET_OK ==
977 GNUNET_CONTAINER_multihashmap_put (plugin->sessions,
978 &s->target.hashPubKey,
980 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
982 GNUNET_STATISTICS_set(plugin->env->stats,
983 "# UDP sessions active",
984 GNUNET_CONTAINER_multihashmap_size(plugin->sessions),
992 enqueue (struct Plugin *plugin, struct UDPMessageWrapper * udpw)
995 if (udpw->session->addrlen == sizeof (struct sockaddr_in))
996 GNUNET_CONTAINER_DLL_insert(plugin->ipv4_queue_head, plugin->ipv4_queue_tail, udpw);
997 if (udpw->session->addrlen == sizeof (struct sockaddr_in6))
998 GNUNET_CONTAINER_DLL_insert(plugin->ipv6_queue_head, plugin->ipv6_queue_tail, udpw);
1003 * Fragment message was transmitted via UDP, let fragmentation know
1004 * to send the next fragment now.
1006 * @param cls the 'struct UDPMessageWrapper' of the fragment
1007 * @param target destination peer (ignored)
1008 * @param result GNUNET_OK on success (ignored)
1011 send_next_fragment (void *cls,
1012 const struct GNUNET_PeerIdentity *target,
1015 struct UDPMessageWrapper *udpw = cls;
1017 GNUNET_FRAGMENT_context_transmission_done (udpw->frag_ctx->frag);
1022 * Function that is called with messages created by the fragmentation
1023 * module. In the case of the 'proc' callback of the
1024 * GNUNET_FRAGMENT_context_create function, this function must
1025 * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
1027 * @param cls closure, the 'struct FragmentationContext'
1028 * @param msg the message that was created
1031 enqueue_fragment (void *cls, const struct GNUNET_MessageHeader *msg)
1033 struct FragmentationContext *frag_ctx = cls;
1034 struct Plugin *plugin = frag_ctx->plugin;
1035 struct UDPMessageWrapper * udpw;
1037 size_t msg_len = ntohs (msg->size);
1039 LOG (GNUNET_ERROR_TYPE_DEBUG,
1040 "Enqueuing fragment with %u bytes %u\n", msg_len , sizeof (struct UDPMessageWrapper));
1041 udpw = GNUNET_malloc (sizeof (struct UDPMessageWrapper) + msg_len);
1042 udpw->session = frag_ctx->session;
1044 udpw->udp = (char *) &udpw[1];
1046 udpw->msg_size = msg_len;
1047 udpw->cont = &send_next_fragment;
1048 udpw->cont_cls = udpw;
1049 udpw->timeout = frag_ctx->timeout;
1050 udpw->frag_ctx = frag_ctx;
1051 memcpy (udpw->udp, msg, msg_len);
1052 enqueue (plugin, udpw);
1054 if (s->addrlen == sizeof (struct sockaddr_in))
1056 if (plugin->with_v4_ws == GNUNET_NO)
1058 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
1059 GNUNET_SCHEDULER_cancel(plugin->select_task);
1061 plugin->select_task =
1062 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1063 GNUNET_TIME_UNIT_FOREVER_REL,
1066 &udp_plugin_select, plugin);
1067 plugin->with_v4_ws = GNUNET_YES;
1070 else if (s->addrlen == sizeof (struct sockaddr_in6))
1072 if (plugin->with_v6_ws == GNUNET_NO)
1074 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK)
1075 GNUNET_SCHEDULER_cancel(plugin->select_task_v6);
1077 plugin->select_task_v6 =
1078 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1079 GNUNET_TIME_UNIT_FOREVER_REL,
1082 &udp_plugin_select_v6, plugin);
1083 plugin->with_v6_ws = GNUNET_YES;
1090 * Function that can be used by the transport service to transmit
1091 * a message using the plugin. Note that in the case of a
1092 * peer disconnecting, the continuation MUST be called
1093 * prior to the disconnect notification itself. This function
1094 * will be called with this peer's HELLO message to initiate
1095 * a fresh connection to another peer.
1097 * @param cls closure
1098 * @param s which session must be used
1099 * @param msgbuf the message to transmit
1100 * @param msgbuf_size number of bytes in 'msgbuf'
1101 * @param priority how important is the message (most plugins will
1102 * ignore message priority and just FIFO)
1103 * @param to how long to wait at most for the transmission (does not
1104 * require plugins to discard the message after the timeout,
1105 * just advisory for the desired delay; most plugins will ignore
1107 * @param cont continuation to call once the message has
1108 * been transmitted (or if the transport is ready
1109 * for the next transmission call; or if the
1110 * peer disconnected...); can be NULL
1111 * @param cont_cls closure for cont
1112 * @return number of bytes used (on the physical network, with overheads);
1113 * -1 on hard errors (i.e. address invalid); 0 is a legal value
1114 * and does NOT mean that the message was not transmitted (DV)
1117 udp_plugin_send (void *cls,
1119 const char *msgbuf, size_t msgbuf_size,
1120 unsigned int priority,
1121 struct GNUNET_TIME_Relative to,
1122 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
1124 struct Plugin *plugin = cls;
1125 size_t mlen = msgbuf_size + sizeof (struct UDPMessage);
1126 struct UDPMessageWrapper * udpw;
1127 struct UDPMessage *udp;
1129 GNUNET_assert (plugin != NULL);
1130 GNUNET_assert (s != NULL);
1132 if ((s->addrlen == sizeof (struct sockaddr_in6)) && (plugin->sockv6 == NULL))
1133 return GNUNET_SYSERR;
1134 if ((s->addrlen == sizeof (struct sockaddr_in)) && (plugin->sockv4 == NULL))
1135 return GNUNET_SYSERR;
1136 if (mlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1139 return GNUNET_SYSERR;
1141 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains_value(plugin->sessions, &s->target.hashPubKey, s))
1144 return GNUNET_SYSERR;
1146 LOG (GNUNET_ERROR_TYPE_DEBUG,
1147 "UDP transmits %u-byte message to `%s' using address `%s'\n",
1149 GNUNET_i2s (&s->target),
1150 GNUNET_a2s(s->sock_addr, s->addrlen));
1153 udp = (struct UDPMessage *) mbuf;
1154 udp->header.size = htons (mlen);
1155 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
1156 udp->reserved = htonl (0);
1157 udp->sender = *plugin->env->my_identity;
1159 reschedule_session_timeout(s);
1160 if (mlen <= UDP_MTU)
1162 udpw = GNUNET_malloc (sizeof (struct UDPMessageWrapper) + mlen);
1164 udpw->udp = (char *) &udpw[1];
1165 udpw->msg_size = mlen;
1166 udpw->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1168 udpw->cont_cls = cont_cls;
1169 udpw->frag_ctx = NULL;
1170 memcpy (udpw->udp, udp, sizeof (struct UDPMessage));
1171 memcpy (&udpw->udp[sizeof (struct UDPMessage)], msgbuf, msgbuf_size);
1173 enqueue (plugin, udpw);
1177 LOG (GNUNET_ERROR_TYPE_DEBUG,
1178 "UDP has to fragment message \n");
1179 if (s->frag_ctx != NULL)
1180 return GNUNET_SYSERR;
1181 memcpy (&udp[1], msgbuf, msgbuf_size);
1182 struct FragmentationContext * frag_ctx = GNUNET_malloc(sizeof (struct FragmentationContext));
1184 frag_ctx->plugin = plugin;
1185 frag_ctx->session = s;
1186 frag_ctx->cont = cont;
1187 frag_ctx->cont_cls = cont_cls;
1188 frag_ctx->timeout = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), to);
1189 frag_ctx->bytes_to_send = mlen;
1190 frag_ctx->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
1193 s->last_expected_delay,
1198 s->frag_ctx = frag_ctx;
1201 if (s->addrlen == sizeof (struct sockaddr_in))
1203 if (plugin->with_v4_ws == GNUNET_NO)
1205 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
1206 GNUNET_SCHEDULER_cancel(plugin->select_task);
1208 plugin->select_task =
1209 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1210 GNUNET_TIME_UNIT_FOREVER_REL,
1213 &udp_plugin_select, plugin);
1214 plugin->with_v4_ws = GNUNET_YES;
1217 else if (s->addrlen == sizeof (struct sockaddr_in6))
1219 if (plugin->with_v6_ws == GNUNET_NO)
1221 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK)
1222 GNUNET_SCHEDULER_cancel(plugin->select_task_v6);
1224 plugin->select_task_v6 =
1225 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1226 GNUNET_TIME_UNIT_FOREVER_REL,
1229 &udp_plugin_select_v6, plugin);
1230 plugin->with_v6_ws = GNUNET_YES;
1239 * Our external IP address/port mapping has changed.
1241 * @param cls closure, the 'struct LocalAddrList'
1242 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1243 * the previous (now invalid) one
1244 * @param addr either the previous or the new public IP address
1245 * @param addrlen actual lenght of the address
1248 udp_nat_port_map_callback (void *cls, int add_remove,
1249 const struct sockaddr *addr, socklen_t addrlen)
1251 struct Plugin *plugin = cls;
1252 struct IPv4UdpAddress u4;
1253 struct IPv6UdpAddress u6;
1257 /* convert 'addr' to our internal format */
1258 switch (addr->sa_family)
1261 GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
1262 u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1263 u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
1268 GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
1269 memcpy (&u6.ipv6_addr, &((struct sockaddr_in6 *) addr)->sin6_addr,
1270 sizeof (struct in6_addr));
1271 u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
1279 /* modify our published address list */
1280 plugin->env->notify_address (plugin->env->cls, add_remove, arg, args);
1286 * Message tokenizer has broken up an incomming message. Pass it on
1289 * @param cls the 'struct Plugin'
1290 * @param client the 'struct SourceInformation'
1291 * @param hdr the actual message
1294 process_inbound_tokenized_messages (void *cls, void *client,
1295 const struct GNUNET_MessageHeader *hdr)
1297 struct Plugin *plugin = cls;
1298 struct SourceInformation *si = client;
1299 struct GNUNET_ATS_Information ats[2];
1300 struct GNUNET_TIME_Relative delay;
1302 GNUNET_assert (si->session != NULL);
1303 if (GNUNET_YES == si->session->in_destroy)
1306 ats[0].type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE);
1307 ats[0].value = htonl (1);
1308 ats[1] = si->session->ats;
1309 GNUNET_break (ntohl(ats[1].value) != GNUNET_ATS_NET_UNSPECIFIED);
1310 delay = plugin->env->receive (plugin->env->cls,
1313 (const struct GNUNET_ATS_Information *) &ats, 2,
1317 si->session->flow_delay_for_other_peer = delay;
1318 reschedule_session_timeout(si->session);
1324 * We've received a UDP Message. Process it (pass contents to main service).
1326 * @param plugin plugin context
1327 * @param msg the message
1328 * @param sender_addr sender address
1329 * @param sender_addr_len number of bytes in sender_addr
1332 process_udp_message (struct Plugin *plugin, const struct UDPMessage *msg,
1333 const struct sockaddr *sender_addr,
1334 socklen_t sender_addr_len)
1336 struct SourceInformation si;
1338 struct IPv4UdpAddress u4;
1339 struct IPv6UdpAddress u6;
1343 if (0 != ntohl (msg->reserved))
1345 GNUNET_break_op (0);
1348 if (ntohs (msg->header.size) <
1349 sizeof (struct GNUNET_MessageHeader) + sizeof (struct UDPMessage))
1351 GNUNET_break_op (0);
1355 /* convert address */
1356 switch (sender_addr->sa_family)
1359 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in));
1360 u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
1361 u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
1366 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in6));
1367 u6.ipv6_addr = ((struct sockaddr_in6 *) sender_addr)->sin6_addr;
1368 u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
1376 LOG (GNUNET_ERROR_TYPE_DEBUG,
1377 "Received message with %u bytes from peer `%s' at `%s'\n",
1378 (unsigned int) ntohs (msg->header.size), GNUNET_i2s (&msg->sender),
1379 GNUNET_a2s (sender_addr, sender_addr_len));
1381 struct GNUNET_HELLO_Address * address = GNUNET_HELLO_address_allocate(&msg->sender, "udp", arg, args);
1382 s = udp_plugin_get_session(plugin, address);
1383 GNUNET_free (address);
1385 /* iterate over all embedded messages */
1387 si.sender = msg->sender;
1391 GNUNET_SERVER_mst_receive (plugin->mst, &si, (const char *) &msg[1],
1392 ntohs (msg->header.size) -
1393 sizeof (struct UDPMessage), GNUNET_YES, GNUNET_NO);
1395 if ( (0 == s->rc) && (GNUNET_YES == s->in_destroy))
1401 * Scan the heap for a receive context with the given address.
1403 * @param cls the 'struct FindReceiveContext'
1404 * @param node internal node of the heap
1405 * @param element value stored at the node (a 'struct ReceiveContext')
1406 * @param cost cost associated with the node
1407 * @return GNUNET_YES if we should continue to iterate,
1411 find_receive_context (void *cls, struct GNUNET_CONTAINER_HeapNode *node,
1412 void *element, GNUNET_CONTAINER_HeapCostType cost)
1414 struct FindReceiveContext *frc = cls;
1415 struct DefragContext *e = element;
1417 if ((frc->addr_len == e->addr_len) &&
1418 (0 == memcmp (frc->addr, e->src_addr, frc->addr_len)))
1428 * Process a defragmented message.
1430 * @param cls the 'struct ReceiveContext'
1431 * @param msg the message
1434 fragment_msg_proc (void *cls, const struct GNUNET_MessageHeader *msg)
1436 struct DefragContext *rc = cls;
1438 if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
1443 if (ntohs (msg->size) < sizeof (struct UDPMessage))
1448 process_udp_message (rc->plugin, (const struct UDPMessage *) msg,
1449 rc->src_addr, rc->addr_len);
1453 struct LookupContext
1455 const struct sockaddr * addr;
1457 struct Session *res;
1464 lookup_session_by_addr_it (void *cls, const GNUNET_HashCode * key, void *value)
1466 struct LookupContext *l_ctx = cls;
1467 struct Session * s = value;
1469 if ((s->addrlen == l_ctx->addrlen) &&
1470 (0 == memcmp (s->sock_addr, l_ctx->addr, s->addrlen)))
1480 * Transmit an acknowledgement.
1482 * @param cls the 'struct ReceiveContext'
1483 * @param id message ID (unused)
1484 * @param msg ack to transmit
1487 ack_proc (void *cls, uint32_t id, const struct GNUNET_MessageHeader *msg)
1489 struct DefragContext *rc = cls;
1490 size_t msize = sizeof (struct UDP_ACK_Message) + ntohs (msg->size);
1491 struct UDP_ACK_Message *udp_ack;
1493 struct UDPMessageWrapper *udpw;
1496 struct LookupContext l_ctx;
1497 l_ctx.addr = rc->src_addr;
1498 l_ctx.addrlen = rc->addr_len;
1500 GNUNET_CONTAINER_multihashmap_iterate (rc->plugin->sessions,
1501 &lookup_session_by_addr_it,
1508 if (s->flow_delay_for_other_peer.rel_value <= UINT32_MAX)
1509 delay = s->flow_delay_for_other_peer.rel_value;
1511 LOG (GNUNET_ERROR_TYPE_DEBUG,
1512 "Sending ACK to `%s' including delay of %u ms\n",
1513 GNUNET_a2s (rc->src_addr,
1514 (rc->src_addr->sa_family ==
1515 AF_INET) ? sizeof (struct sockaddr_in) : sizeof (struct
1518 udpw = GNUNET_malloc (sizeof (struct UDPMessageWrapper) + msize);
1519 udpw->msg_size = msize;
1521 udpw->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
1522 udpw->udp = (char *)&udpw[1];
1523 udp_ack = (struct UDP_ACK_Message *) udpw->udp;
1524 udp_ack->header.size = htons ((uint16_t) msize);
1525 udp_ack->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
1526 udp_ack->delay = htonl (delay);
1527 udp_ack->sender = *rc->plugin->env->my_identity;
1528 memcpy (&udp_ack[1], msg, ntohs (msg->size));
1530 enqueue (rc->plugin, udpw);
1535 read_process_msg (struct Plugin *plugin,
1536 const struct GNUNET_MessageHeader *msg,
1540 if (ntohs (msg->size) < sizeof (struct UDPMessage))
1542 GNUNET_break_op (0);
1545 process_udp_message (plugin, (const struct UDPMessage *) msg,
1546 (const struct sockaddr *) addr, fromlen);
1551 read_process_ack (struct Plugin *plugin,
1552 const struct GNUNET_MessageHeader *msg,
1556 const struct GNUNET_MessageHeader *ack;
1557 const struct UDP_ACK_Message *udp_ack;
1558 struct LookupContext l_ctx;
1560 struct GNUNET_TIME_Relative flow_delay;
1562 if (ntohs (msg->size) <
1563 sizeof (struct UDP_ACK_Message) + sizeof (struct GNUNET_MessageHeader))
1565 GNUNET_break_op (0);
1568 udp_ack = (const struct UDP_ACK_Message *) msg;
1569 l_ctx.addr = (const struct sockaddr *) addr;
1570 l_ctx.addrlen = fromlen;
1572 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions,
1573 &lookup_session_by_addr_it,
1577 if ((s == NULL) || (s->frag_ctx == NULL))
1580 flow_delay.rel_value = (uint64_t) ntohl (udp_ack->delay);
1581 LOG (GNUNET_ERROR_TYPE_DEBUG, "We received a sending delay of %llu\n",
1582 flow_delay.rel_value);
1583 s->flow_delay_from_other_peer =
1584 GNUNET_TIME_relative_to_absolute (flow_delay);
1586 ack = (const struct GNUNET_MessageHeader *) &udp_ack[1];
1587 if (ntohs (ack->size) !=
1588 ntohs (msg->size) - sizeof (struct UDP_ACK_Message))
1590 GNUNET_break_op (0);
1594 if (GNUNET_OK != GNUNET_FRAGMENT_process_ack (s->frag_ctx->frag, ack))
1596 LOG (GNUNET_ERROR_TYPE_DEBUG,
1597 "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
1598 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
1599 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
1603 LOG (GNUNET_ERROR_TYPE_DEBUG,
1604 "FULL MESSAGE ACKed\n",
1605 (unsigned int) ntohs (msg->size), GNUNET_i2s (&udp_ack->sender),
1606 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
1607 s->last_expected_delay = GNUNET_FRAGMENT_context_destroy (s->frag_ctx->frag);
1609 struct UDPMessageWrapper * udpw;
1610 struct UDPMessageWrapper * tmp;
1611 if (s->addrlen == sizeof (struct sockaddr_in6))
1613 udpw = plugin->ipv6_queue_head;
1614 while (NULL != udpw)
1617 if ((udpw->frag_ctx != NULL) && (udpw->frag_ctx == s->frag_ctx))
1619 GNUNET_CONTAINER_DLL_remove(plugin->ipv6_queue_head, plugin->ipv6_queue_tail, udpw);
1625 if (s->addrlen == sizeof (struct sockaddr_in))
1627 udpw = plugin->ipv4_queue_head;
1631 if ((udpw->frag_ctx != NULL) && (udpw->frag_ctx == s->frag_ctx))
1633 GNUNET_CONTAINER_DLL_remove(plugin->ipv4_queue_head, plugin->ipv4_queue_tail, udpw);
1640 if (s->frag_ctx->cont != NULL)
1642 LOG (GNUNET_ERROR_TYPE_DEBUG,
1643 "Calling continuation for fragmented message to `%s' with result %s\n",
1644 GNUNET_i2s (&s->target), "OK");
1645 s->frag_ctx->cont (s->frag_ctx->cont_cls, &udp_ack->sender, GNUNET_OK);
1648 GNUNET_free (s->frag_ctx);
1654 read_process_fragment (struct Plugin *plugin,
1655 const struct GNUNET_MessageHeader *msg,
1659 struct DefragContext *d_ctx;
1660 struct GNUNET_TIME_Absolute now;
1661 struct FindReceiveContext frc;
1664 frc.addr = (const struct sockaddr *) addr;
1665 frc.addr_len = fromlen;
1667 LOG (GNUNET_ERROR_TYPE_DEBUG, "UDP processes %u-byte fragment from `%s'\n",
1668 (unsigned int) ntohs (msg->size),
1669 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
1670 /* Lookup existing receive context for this address */
1671 GNUNET_CONTAINER_heap_iterate (plugin->defrag_ctxs,
1672 &find_receive_context,
1674 now = GNUNET_TIME_absolute_get ();
1679 /* Create a new defragmentation context */
1680 d_ctx = GNUNET_malloc (sizeof (struct DefragContext) + fromlen);
1681 memcpy (&d_ctx[1], addr, fromlen);
1682 d_ctx->src_addr = (const struct sockaddr *) &d_ctx[1];
1683 d_ctx->addr_len = fromlen;
1684 d_ctx->plugin = plugin;
1686 GNUNET_DEFRAGMENT_context_create (plugin->env->stats, UDP_MTU,
1687 UDP_MAX_MESSAGES_IN_DEFRAG, d_ctx,
1688 &fragment_msg_proc, &ack_proc);
1690 GNUNET_CONTAINER_heap_insert (plugin->defrag_ctxs, d_ctx,
1691 (GNUNET_CONTAINER_HeapCostType)
1693 LOG (GNUNET_ERROR_TYPE_DEBUG,
1694 "Created new defragmentation context for %u-byte fragment from `%s'\n",
1695 (unsigned int) ntohs (msg->size),
1696 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
1700 LOG (GNUNET_ERROR_TYPE_DEBUG,
1701 "Found existing defragmentation context for %u-byte fragment from `%s'\n",
1702 (unsigned int) ntohs (msg->size),
1703 GNUNET_a2s ((const struct sockaddr *) addr, fromlen));
1706 if (GNUNET_OK == GNUNET_DEFRAGMENT_process_fragment (d_ctx->defrag, msg))
1708 /* keep this 'rc' from expiring */
1709 GNUNET_CONTAINER_heap_update_cost (plugin->defrag_ctxs, d_ctx->hnode,
1710 (GNUNET_CONTAINER_HeapCostType)
1713 if (GNUNET_CONTAINER_heap_get_size (plugin->defrag_ctxs) >
1714 UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
1716 /* remove 'rc' that was inactive the longest */
1717 d_ctx = GNUNET_CONTAINER_heap_remove_root (plugin->defrag_ctxs);
1718 GNUNET_assert (NULL != d_ctx);
1719 GNUNET_DEFRAGMENT_context_destroy (d_ctx->defrag);
1720 GNUNET_free (d_ctx);
1726 * Read and process a message from the given socket.
1728 * @param plugin the overall plugin
1729 * @param rsock socket to read from
1732 udp_select_read (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *rsock)
1736 char buf[65536] GNUNET_ALIGN;
1738 const struct GNUNET_MessageHeader *msg;
1740 fromlen = sizeof (addr);
1741 memset (&addr, 0, sizeof (addr));
1742 size = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof (buf),
1743 (struct sockaddr *) &addr, &fromlen);
1745 /* On SOCK_DGRAM UDP sockets recvfrom might fail with a
1746 * WSAECONNRESET error to indicate that previous sendto() (???)
1747 * on this socket has failed.
1749 if ( (-1 == size) && (ECONNRESET == errno) )
1752 if ( (-1 == size) || (size < sizeof (struct GNUNET_MessageHeader)))
1754 GNUNET_break_op (0);
1757 msg = (const struct GNUNET_MessageHeader *) buf;
1759 LOG (GNUNET_ERROR_TYPE_DEBUG,
1760 "UDP received %u-byte message from `%s' type %i\n", (unsigned int) size,
1761 GNUNET_a2s ((const struct sockaddr *) addr, fromlen), ntohs (msg->type));
1763 if (size != ntohs (msg->size))
1765 GNUNET_break_op (0);
1769 switch (ntohs (msg->type))
1771 case GNUNET_MESSAGE_TYPE_TRANSPORT_BROADCAST_BEACON:
1772 udp_broadcast_receive (plugin, &buf, size, addr, fromlen);
1775 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
1776 read_process_msg (plugin, msg, addr, fromlen);
1779 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
1780 read_process_ack (plugin, msg, addr, fromlen);
1783 case GNUNET_MESSAGE_TYPE_FRAGMENT:
1784 read_process_fragment (plugin, msg, addr, fromlen);
1788 GNUNET_break_op (0);
1795 udp_select_send (struct Plugin *plugin, struct GNUNET_NETWORK_Handle *sock)
1799 struct GNUNET_TIME_Absolute max;
1800 struct UDPMessageWrapper *udpw = NULL;
1802 if (sock == plugin->sockv4)
1804 udpw = plugin->ipv4_queue_head;
1806 else if (sock == plugin->sockv6)
1808 udpw = plugin->ipv6_queue_head;
1816 const struct sockaddr * sa = udpw->session->sock_addr;
1817 slen = udpw->session->addrlen;
1819 max = GNUNET_TIME_absolute_max(udpw->timeout, GNUNET_TIME_absolute_get());
1821 while (udpw != NULL)
1823 if (max.abs_value != udpw->timeout.abs_value)
1825 /* Message timed out */
1826 call_continuation(udpw, GNUNET_SYSERR);
1827 if (udpw->frag_ctx != NULL)
1829 LOG (GNUNET_ERROR_TYPE_DEBUG,
1830 "Fragmented message for peer `%s' with size %u timed out\n",
1831 GNUNET_i2s(&udpw->session->target), udpw->frag_ctx->bytes_to_send);
1832 udpw->session->last_expected_delay = GNUNET_FRAGMENT_context_destroy(udpw->frag_ctx->frag);
1833 GNUNET_free (udpw->frag_ctx);
1834 udpw->session->frag_ctx = NULL;
1838 LOG (GNUNET_ERROR_TYPE_DEBUG,
1839 "Message for peer `%s' with size %u timed out\n",
1840 GNUNET_i2s(&udpw->session->target), udpw->msg_size);
1843 if (sock == plugin->sockv4)
1845 GNUNET_CONTAINER_DLL_remove(plugin->ipv4_queue_head, plugin->ipv4_queue_tail, udpw);
1847 udpw = plugin->ipv4_queue_head;
1849 else if (sock == plugin->sockv6)
1851 GNUNET_CONTAINER_DLL_remove(plugin->ipv6_queue_head, plugin->ipv6_queue_tail, udpw);
1853 udpw = plugin->ipv6_queue_head;
1858 struct GNUNET_TIME_Relative delta = GNUNET_TIME_absolute_get_remaining (udpw->session->flow_delay_from_other_peer);
1859 if (delta.rel_value == 0)
1861 /* this message is not delayed */
1862 LOG (GNUNET_ERROR_TYPE_DEBUG,
1863 "Message for peer `%s' (%u bytes) is not delayed \n",
1864 GNUNET_i2s(&udpw->session->target), udpw->msg_size);
1869 /* this message is delayed, try next */
1870 LOG (GNUNET_ERROR_TYPE_DEBUG,
1871 "Message for peer `%s' (%u bytes) is delayed for %llu \n",
1872 GNUNET_i2s(&udpw->session->target), udpw->msg_size,
1881 /* No message left */
1885 sent = GNUNET_NETWORK_socket_sendto (sock, udpw->udp, udpw->msg_size, sa, slen);
1887 if (GNUNET_SYSERR == sent)
1889 const struct GNUNET_ATS_Information type = plugin->env->get_address_type
1890 (plugin->env->cls,sa, slen);
1892 if ((GNUNET_ATS_NET_WAN == type.value) &&
1893 ((ENETUNREACH == errno) || (ENETDOWN == errno)))
1895 /* "Network unreachable" or "Network down" */
1897 * This indicates that this system is IPv6 enabled, but does not
1898 * have a valid global IPv6 address assigned
1900 LOG (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
1901 _("UDP could not message to `%s': `%s'. "
1902 "Please check your network configuration and disable IPv6 if your "
1903 "connection does not have a global IPv6 address\n"),
1904 GNUNET_a2s (sa, slen),
1909 LOG (GNUNET_ERROR_TYPE_ERROR,
1910 "UDP could not transmit %u-byte message to `%s': `%s'\n",
1911 (unsigned int) (udpw->msg_size), GNUNET_a2s (sa, slen),
1914 call_continuation(udpw, GNUNET_SYSERR);
1918 LOG (GNUNET_ERROR_TYPE_DEBUG,
1919 "UDP transmitted %u-byte message to `%s' (%d: %s)\n",
1920 (unsigned int) (udpw->msg_size), GNUNET_a2s (sa, slen), (int) sent,
1921 (sent < 0) ? STRERROR (errno) : "ok");
1922 call_continuation(udpw, GNUNET_OK);
1925 if (sock == plugin->sockv4)
1926 GNUNET_CONTAINER_DLL_remove(plugin->ipv4_queue_head, plugin->ipv4_queue_tail, udpw);
1927 else if (sock == plugin->sockv6)
1928 GNUNET_CONTAINER_DLL_remove(plugin->ipv6_queue_head, plugin->ipv6_queue_tail, udpw);
1937 * We have been notified that our readset has something to read. We don't
1938 * know which socket needs to be read, so we have to check each one
1939 * Then reschedule this function to be called again once more is available.
1941 * @param cls the plugin handle
1942 * @param tc the scheduling context (for rescheduling this function again)
1945 udp_plugin_select (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1947 struct Plugin *plugin = cls;
1949 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
1950 if ((tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
1952 plugin->with_v4_ws = GNUNET_NO;
1954 if ((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0)
1956 if ((NULL != plugin->sockv4) &&
1957 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv4)))
1958 udp_select_read (plugin, plugin->sockv4);
1962 if ((tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY) != 0)
1964 if ((NULL != plugin->sockv4) && (plugin->ipv4_queue_head != NULL) &&
1965 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv4)))
1967 udp_select_send (plugin, plugin->sockv4);
1971 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
1972 GNUNET_SCHEDULER_cancel (plugin->select_task);
1973 plugin->select_task = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1974 GNUNET_TIME_UNIT_FOREVER_REL,
1976 (plugin->ipv4_queue_head != NULL) ? plugin->ws_v4 : NULL,
1977 &udp_plugin_select, plugin);
1978 if (plugin->ipv4_queue_head != NULL)
1979 plugin->with_v4_ws = GNUNET_YES;
1981 plugin->with_v4_ws = GNUNET_NO;
1986 * We have been notified that our readset has something to read. We don't
1987 * know which socket needs to be read, so we have to check each one
1988 * Then reschedule this function to be called again once more is available.
1990 * @param cls the plugin handle
1991 * @param tc the scheduling context (for rescheduling this function again)
1994 udp_plugin_select_v6 (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1996 struct Plugin *plugin = cls;
1998 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
1999 if ((tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
2002 plugin->with_v6_ws = GNUNET_NO;
2003 if ((tc->reason & GNUNET_SCHEDULER_REASON_READ_READY) != 0)
2005 if ((NULL != plugin->sockv6) &&
2006 (GNUNET_NETWORK_fdset_isset (tc->read_ready, plugin->sockv6)))
2007 udp_select_read (plugin, plugin->sockv6);
2010 if ((tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY) != 0)
2012 if ((NULL != plugin->sockv6) && (plugin->ipv6_queue_head != NULL) &&
2013 (GNUNET_NETWORK_fdset_isset (tc->write_ready, plugin->sockv6)))
2015 udp_select_send (plugin, plugin->sockv6);
2018 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK)
2019 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
2020 plugin->select_task_v6 = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
2021 GNUNET_TIME_UNIT_FOREVER_REL,
2023 (plugin->ipv6_queue_head != NULL) ? plugin->ws_v6 : NULL,
2024 &udp_plugin_select_v6, plugin);
2025 if (plugin->ipv6_queue_head != NULL)
2026 plugin->with_v6_ws = GNUNET_YES;
2028 plugin->with_v6_ws = GNUNET_NO;
2033 setup_sockets (struct Plugin *plugin, struct sockaddr_in6 *serverAddrv6, struct sockaddr_in *serverAddrv4)
2036 int sockets_created = 0;
2037 struct sockaddr *serverAddr;
2038 struct sockaddr *addrs[2];
2039 socklen_t addrlens[2];
2042 /* Create IPv6 socket */
2043 if (plugin->enable_ipv6 == GNUNET_YES)
2045 plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
2046 if (NULL == plugin->sockv6)
2048 LOG (GNUNET_ERROR_TYPE_WARNING, "Disabling IPv6 since it is not supported on this system!\n");
2049 plugin->enable_ipv6 = GNUNET_NO;
2053 #if HAVE_SOCKADDR_IN_SIN_LEN
2054 serverAddrv6->sin6_len = sizeof (serverAddrv6);
2056 serverAddrv6->sin6_family = AF_INET6;
2057 serverAddrv6->sin6_addr = in6addr_any;
2058 serverAddrv6->sin6_port = htons (plugin->port);
2059 addrlen = sizeof (struct sockaddr_in6);
2060 serverAddr = (struct sockaddr *) serverAddrv6;
2061 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv6 port %d\n",
2062 ntohs (serverAddrv6->sin6_port));
2064 while (GNUNET_NETWORK_socket_bind (plugin->sockv6, serverAddr, addrlen) !=
2067 serverAddrv6->sin6_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000); /* Find a good, non-root port */
2068 LOG (GNUNET_ERROR_TYPE_DEBUG,
2069 "IPv6 Binding failed, trying new port %d\n",
2070 ntohs (serverAddrv6->sin6_port));
2074 GNUNET_NETWORK_socket_close (plugin->sockv6);
2075 plugin->sockv6 = NULL;
2079 if (plugin->sockv6 != NULL)
2081 LOG (GNUNET_ERROR_TYPE_DEBUG,
2082 "IPv6 socket created on port %d\n",
2083 ntohs (serverAddrv6->sin6_port));
2084 addrs[sockets_created] = (struct sockaddr *) serverAddrv6;
2085 addrlens[sockets_created] = sizeof (struct sockaddr_in6);
2091 /* Create IPv4 socket */
2092 plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
2093 if (NULL == plugin->sockv4)
2095 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
2099 #if HAVE_SOCKADDR_IN_SIN_LEN
2100 serverAddrv4->sin_len = sizeof (serverAddrv4);
2102 serverAddrv4->sin_family = AF_INET;
2103 serverAddrv4->sin_addr.s_addr = INADDR_ANY;
2104 serverAddrv4->sin_port = htons (plugin->port);
2105 addrlen = sizeof (struct sockaddr_in);
2106 serverAddr = (struct sockaddr *) serverAddrv4;
2108 LOG (GNUNET_ERROR_TYPE_DEBUG, "Binding to IPv4 port %d\n",
2109 ntohs (serverAddrv4->sin_port));
2111 while (GNUNET_NETWORK_socket_bind (plugin->sockv4, serverAddr, addrlen) !=
2114 serverAddrv4->sin_port = htons (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000); /* Find a good, non-root port */
2115 LOG (GNUNET_ERROR_TYPE_DEBUG, "IPv4 Binding failed, trying new port %d\n",
2116 ntohs (serverAddrv4->sin_port));
2120 GNUNET_NETWORK_socket_close (plugin->sockv4);
2121 plugin->sockv4 = NULL;
2125 if (plugin->sockv4 != NULL)
2127 addrs[sockets_created] = (struct sockaddr *) serverAddrv4;
2128 addrlens[sockets_created] = sizeof (struct sockaddr_in);
2133 /* Create file descriptors */
2134 plugin->rs_v4 = GNUNET_NETWORK_fdset_create ();
2135 plugin->ws_v4 = GNUNET_NETWORK_fdset_create ();
2136 GNUNET_NETWORK_fdset_zero (plugin->rs_v4);
2137 GNUNET_NETWORK_fdset_zero (plugin->ws_v4);
2138 if (NULL != plugin->sockv4)
2140 GNUNET_NETWORK_fdset_set (plugin->rs_v4, plugin->sockv4);
2141 GNUNET_NETWORK_fdset_set (plugin->ws_v4, plugin->sockv4);
2144 if (sockets_created == 0)
2145 LOG (GNUNET_ERROR_TYPE_WARNING, _("Failed to open UDP sockets\n"));
2147 plugin->select_task =
2148 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
2149 GNUNET_TIME_UNIT_FOREVER_REL,
2152 &udp_plugin_select, plugin);
2153 plugin->with_v4_ws = GNUNET_NO;
2155 if (plugin->enable_ipv6 == GNUNET_YES)
2157 plugin->rs_v6 = GNUNET_NETWORK_fdset_create ();
2158 plugin->ws_v6 = GNUNET_NETWORK_fdset_create ();
2159 GNUNET_NETWORK_fdset_zero (plugin->rs_v6);
2160 GNUNET_NETWORK_fdset_zero (plugin->ws_v6);
2161 if (NULL != plugin->sockv6)
2163 GNUNET_NETWORK_fdset_set (plugin->rs_v6, plugin->sockv6);
2164 GNUNET_NETWORK_fdset_set (plugin->ws_v6, plugin->sockv6);
2167 plugin->select_task_v6 =
2168 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
2169 GNUNET_TIME_UNIT_FOREVER_REL,
2172 &udp_plugin_select_v6, plugin);
2173 plugin->with_v6_ws = GNUNET_NO;
2176 plugin->nat = GNUNET_NAT_register (plugin->env->cfg,
2177 GNUNET_NO, plugin->port,
2179 (const struct sockaddr **) addrs, addrlens,
2180 &udp_nat_port_map_callback, NULL, plugin);
2182 return sockets_created;
2186 * Session was idle, so disconnect it
2189 session_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2191 GNUNET_assert (NULL != cls);
2192 struct Session *s = cls;
2194 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2196 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Session %p was idle for %llu, disconnecting\n",
2197 s, GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
2199 /* call session destroy function */
2200 disconnect_session(s);
2205 * Start session timeout
2208 start_session_timeout (struct Session *s)
2210 GNUNET_assert (NULL != s);
2211 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s->timeout_task);
2213 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
2217 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Timeout for session %p set to %llu\n",
2218 s, GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
2222 * Increment session timeout due to activity
2225 reschedule_session_timeout (struct Session *s)
2227 GNUNET_assert (NULL != s);
2228 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s->timeout_task);
2230 GNUNET_SCHEDULER_cancel (s->timeout_task);
2231 s->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
2235 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Timeout rescheduled for session %p set to %llu\n",
2236 s, GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
2243 stop_session_timeout (struct Session *s)
2245 GNUNET_assert (NULL != s);
2247 if (GNUNET_SCHEDULER_NO_TASK != s->timeout_task)
2249 GNUNET_SCHEDULER_cancel (s->timeout_task);
2250 s->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Timeout rescheduled for session %p canceled\n",
2253 s, GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value);
2257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Timeout for session %p was not active\n",
2263 * The exported method. Makes the core api available via a global and
2264 * returns the udp transport API.
2266 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
2267 * @return our 'struct GNUNET_TRANSPORT_PluginFunctions'
2270 libgnunet_plugin_transport_udp_init (void *cls)
2272 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
2273 struct GNUNET_TRANSPORT_PluginFunctions *api;
2275 unsigned long long port;
2276 unsigned long long aport;
2277 unsigned long long broadcast;
2278 unsigned long long udp_max_bps;
2279 unsigned long long enable_v6;
2280 char * bind4_address;
2281 char * bind6_address;
2282 struct GNUNET_TIME_Relative interval;
2283 struct sockaddr_in serverAddrv4;
2284 struct sockaddr_in6 serverAddrv6;
2287 if (NULL == env->receive)
2289 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
2290 initialze the plugin or the API */
2291 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
2293 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
2294 api->address_to_string = &udp_address_to_string;
2295 api->string_to_address = &udp_string_to_address;
2299 GNUNET_assert( NULL != env->stats);
2301 /* Get port number */
2303 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp", "PORT",
2307 GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
2308 "ADVERTISED_PORT", &aport))
2312 LOG (GNUNET_ERROR_TYPE_WARNING,
2313 _("Given `%s' option is out of range: %llu > %u\n"), "PORT", port,
2320 GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "nat",
2323 enable_v6 = GNUNET_NO;
2326 enable_v6 = GNUNET_YES;
2329 memset (&serverAddrv6, 0, sizeof (serverAddrv6));
2330 memset (&serverAddrv4, 0, sizeof (serverAddrv4));
2333 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
2334 "BINDTO", &bind4_address))
2336 LOG (GNUNET_ERROR_TYPE_DEBUG,
2337 "Binding udp plugin to specific address: `%s'\n",
2339 if (1 != inet_pton (AF_INET, bind4_address, &serverAddrv4.sin_addr))
2341 GNUNET_free (bind4_address);
2347 GNUNET_CONFIGURATION_get_value_string (env->cfg, "transport-udp",
2348 "BINDTO6", &bind6_address))
2350 LOG (GNUNET_ERROR_TYPE_DEBUG,
2351 "Binding udp plugin to specific address: `%s'\n",
2354 inet_pton (AF_INET6, bind6_address, &serverAddrv6.sin6_addr))
2356 LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid IPv6 address: `%s'\n"),
2358 GNUNET_free_non_null (bind4_address);
2359 GNUNET_free (bind6_address);
2364 /* Enable neighbour discovery */
2365 broadcast = GNUNET_CONFIGURATION_get_value_yesno (env->cfg, "transport-udp",
2367 if (broadcast == GNUNET_SYSERR)
2368 broadcast = GNUNET_NO;
2370 if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_time (env->cfg, "transport-udp",
2371 "BROADCAST_INTERVAL", &interval))
2373 interval = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10);
2376 /* Maximum datarate */
2377 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (env->cfg, "transport-udp",
2378 "MAX_BPS", &udp_max_bps))
2380 udp_max_bps = 1024 * 1024 * 50; /* 50 MB/s == infinity for practical purposes */
2383 p = GNUNET_malloc (sizeof (struct Plugin));
2384 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
2386 GNUNET_BANDWIDTH_tracker_init (&p->tracker,
2387 GNUNET_BANDWIDTH_value_init ((uint32_t)udp_max_bps), 30);
2388 p->sessions = GNUNET_CONTAINER_multihashmap_create (10);
2389 p->defrag_ctxs = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
2390 p->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages, p);
2393 p->broadcast_interval = interval;
2394 p->enable_ipv6 = enable_v6;
2401 api->disconnect = &udp_disconnect;
2402 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
2403 api->address_to_string = &udp_address_to_string;
2404 api->string_to_address = &udp_string_to_address;
2405 api->check_address = &udp_plugin_check_address;
2406 api->get_session = &udp_plugin_get_session;
2407 api->send = &udp_plugin_send;
2409 LOG (GNUNET_ERROR_TYPE_DEBUG, "Setting up sockets\n");
2410 res = setup_sockets (p, &serverAddrv6, &serverAddrv4);
2411 if ((res == 0) || ((p->sockv4 == NULL) && (p->sockv6 == NULL)))
2413 LOG (GNUNET_ERROR_TYPE_ERROR, "Failed to create network sockets, plugin failed\n");
2419 if (broadcast == GNUNET_YES)
2421 LOG (GNUNET_ERROR_TYPE_DEBUG, "Starting broadcasting\n");
2422 setup_broadcast (p, &serverAddrv6, &serverAddrv4);
2425 GNUNET_free_non_null (bind4_address);
2426 GNUNET_free_non_null (bind6_address);
2432 heap_cleanup_iterator (void *cls,
2433 struct GNUNET_CONTAINER_HeapNode *
2434 node, void *element,
2435 GNUNET_CONTAINER_HeapCostType
2438 struct DefragContext * d_ctx = element;
2440 GNUNET_CONTAINER_heap_remove_node (node);
2441 GNUNET_DEFRAGMENT_context_destroy(d_ctx->defrag);
2442 GNUNET_free (d_ctx);
2449 * The exported method. Makes the core api available via a global and
2450 * returns the udp transport API.
2452 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
2456 libgnunet_plugin_transport_udp_done (void *cls)
2458 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
2459 struct Plugin *plugin = api->cls;
2467 stop_broadcast (plugin);
2469 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
2471 GNUNET_SCHEDULER_cancel (plugin->select_task);
2472 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
2474 if (plugin->select_task_v6 != GNUNET_SCHEDULER_NO_TASK)
2476 GNUNET_SCHEDULER_cancel (plugin->select_task_v6);
2477 plugin->select_task_v6 = GNUNET_SCHEDULER_NO_TASK;
2480 /* Closing sockets */
2481 if (plugin->sockv4 != NULL)
2483 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
2484 plugin->sockv4 = NULL;
2486 GNUNET_NETWORK_fdset_destroy (plugin->rs_v4);
2487 GNUNET_NETWORK_fdset_destroy (plugin->ws_v4);
2489 if (plugin->sockv6 != NULL)
2491 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
2492 plugin->sockv6 = NULL;
2494 GNUNET_NETWORK_fdset_destroy (plugin->rs_v6);
2495 GNUNET_NETWORK_fdset_destroy (plugin->ws_v6);
2498 GNUNET_NAT_unregister (plugin->nat);
2500 if (plugin->defrag_ctxs != NULL)
2502 GNUNET_CONTAINER_heap_iterate(plugin->defrag_ctxs,
2503 heap_cleanup_iterator, NULL);
2504 GNUNET_CONTAINER_heap_destroy(plugin->defrag_ctxs);
2505 plugin->defrag_ctxs = NULL;
2507 if (plugin->mst != NULL)
2509 GNUNET_SERVER_mst_destroy(plugin->mst);
2513 /* Clean up leftover messages */
2514 struct UDPMessageWrapper * udpw;
2515 udpw = plugin->ipv4_queue_head;
2516 while (udpw != NULL)
2518 struct UDPMessageWrapper *tmp = udpw->next;
2519 GNUNET_CONTAINER_DLL_remove(plugin->ipv4_queue_head, plugin->ipv4_queue_tail, udpw);
2520 call_continuation(udpw, GNUNET_SYSERR);
2524 udpw = plugin->ipv6_queue_head;
2525 while (udpw != NULL)
2527 struct UDPMessageWrapper *tmp = udpw->next;
2528 GNUNET_CONTAINER_DLL_remove(plugin->ipv6_queue_head, plugin->ipv6_queue_tail, udpw);
2529 call_continuation(udpw, GNUNET_SYSERR);
2534 /* Clean up sessions */
2535 LOG (GNUNET_ERROR_TYPE_DEBUG,
2536 "Cleaning up sessions\n");
2537 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions, &disconnect_and_free_it, plugin);
2538 GNUNET_CONTAINER_multihashmap_destroy (plugin->sessions);
2541 GNUNET_free (plugin);
2547 /* end of plugin_transport_udp.c */