aboutsummaryrefslogtreecommitdiff
path: root/src/transport/plugin_transport_udp_new.c
diff options
context:
space:
mode:
authorChristian Grothoff <christian@grothoff.org>2011-07-14 17:45:45 +0000
committerChristian Grothoff <christian@grothoff.org>2011-07-14 17:45:45 +0000
commit245187d11cba38164d73afdcb6ddd2a09d701eed (patch)
tree64e03b975b70fab03113a5afd9379ee2015e856b /src/transport/plugin_transport_udp_new.c
parentc5678b2b20d198c2e7715a509d990619dc73c144 (diff)
downloadgnunet-245187d11cba38164d73afdcb6ddd2a09d701eed.tar.gz
gnunet-245187d11cba38164d73afdcb6ddd2a09d701eed.zip
renaming
Diffstat (limited to 'src/transport/plugin_transport_udp_new.c')
-rw-r--r--src/transport/plugin_transport_udp_new.c1620
1 files changed, 0 insertions, 1620 deletions
diff --git a/src/transport/plugin_transport_udp_new.c b/src/transport/plugin_transport_udp_new.c
deleted file mode 100644
index 4f57c6942..000000000
--- a/src/transport/plugin_transport_udp_new.c
+++ /dev/null
@@ -1,1620 +0,0 @@
1/*
2 This file is part of GNUnet
3 (C) 2010, 2011 Christian Grothoff (and other contributing authors)
4
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.
9
10 GNUnet is distributed in the hope that it will be useful, but
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.
14
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.
19*/
20
21/**
22 * @file transport/plugin_transport_udp.c
23 * @brief Implementation of the UDP NAT punching
24 * transport service
25 * @author Christian Grothoff
26 * @author Nathan Evans
27 */
28#include "platform.h"
29#include "gnunet_hello_lib.h"
30#include "gnunet_util_lib.h"
31#include "gnunet_fragmentation_lib.h"
32#include "gnunet_nat_lib.h"
33#include "gnunet_protocols.h"
34#include "gnunet_resolver_service.h"
35#include "gnunet_signatures.h"
36#include "gnunet_statistics_service.h"
37#include "gnunet_transport_service.h"
38#include "gnunet_transport_plugin.h"
39#include "transport.h"
40
41#define DEBUG_UDP GNUNET_NO
42
43/**
44 * MTU for fragmentation subsystem. Should be conservative since
45 * all communicating peers MUST work with this MTU.
46 */
47#define UDP_MTU 1400
48
49/**
50 * Number of messages we can defragment in parallel. We only really
51 * defragment 1 message at a time, but if messages get re-ordered, we
52 * may want to keep knowledge about the previous message to avoid
53 * discarding the current message in favor of a single fragment of a
54 * previous message. 3 should be good since we don't expect massive
55 * message reorderings with UDP.
56 */
57#define UDP_MAX_MESSAGES_IN_DEFRAG 3
58
59/**
60 * We keep a defragmentation queue per sender address. How many
61 * sender addresses do we support at the same time? Memory consumption
62 * is roughly a factor of 32k * UDP_MAX_MESSAGES_IN_DEFRAG times this
63 * value. (So 128 corresponds to 12 MB and should suffice for
64 * connecting to roughly 128 peers via UDP).
65 */
66#define UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG 128
67
68
69/**
70 * UDP Message-Packet header (after defragmentation).
71 */
72struct UDPMessage
73{
74 /**
75 * Message header.
76 */
77 struct GNUNET_MessageHeader header;
78
79 /**
80 * Always zero for now.
81 */
82 uint32_t reserved;
83
84 /**
85 * What is the identity of the sender
86 */
87 struct GNUNET_PeerIdentity sender;
88
89};
90
91
92/**
93 * Network format for IPv4 addresses.
94 */
95struct IPv4UdpAddress
96{
97 /**
98 * IPv4 address, in network byte order.
99 */
100 uint32_t ipv4_addr GNUNET_PACKED;
101
102 /**
103 * Port number, in network byte order.
104 */
105 uint16_t u4_port GNUNET_PACKED;
106};
107
108
109/**
110 * Network format for IPv6 addresses.
111 */
112struct IPv6UdpAddress
113{
114
115 /**
116 * IPv6 address.
117 */
118 struct in6_addr ipv6_addr GNUNET_PACKED;
119
120 /**
121 * Port number, in network byte order.
122 */
123 uint16_t u6_port GNUNET_PACKED;
124};
125
126
127/* Forward definition */
128struct Plugin;
129
130
131/**
132 * Session with another peer.
133 */
134struct PeerSession
135{
136
137 /**
138 * Which peer is this session for?
139 */
140 struct GNUNET_PeerIdentity target;
141
142 /**
143 * Pointer to the global plugin struct.
144 */
145 struct Plugin *plugin;
146
147 /**
148 * Address of the other peer
149 */
150 const struct sockaddr *sock_addr;
151
152 /**
153 * Function to call upon completion of the transmission.
154 */
155 GNUNET_TRANSPORT_TransmitContinuation cont;
156
157 /**
158 * Closure for 'cont'.
159 */
160 void *cont_cls;
161
162 /**
163 * Current outgoing message to this peer.
164 */
165 struct GNUNET_FRAGMENT_Context *frag;
166
167};
168
169
170/**
171 * Data structure to track defragmentation contexts based
172 * on the source of the UDP traffic.
173 */
174struct ReceiveContext
175{
176
177 /**
178 * Defragmentation context.
179 */
180 struct GNUNET_DEFRAGMENT_Context *defrag;
181
182 /**
183 * Source address this receive context is for (allocated at the
184 * end of the struct).
185 */
186 const struct sockaddr *src_addr;
187
188 /**
189 * Reference to master plugin struct.
190 */
191 struct Plugin *plugin;
192
193 /**
194 * Node in the defrag heap.
195 */
196 struct GNUNET_CONTAINER_HeapNode *hnode;
197
198 /**
199 * Length of 'src_addr'
200 */
201 size_t addr_len;
202
203};
204
205
206/**
207 * Encapsulation of all of the state of the plugin.
208 */
209struct Plugin
210{
211
212 /**
213 * Our environment.
214 */
215 struct GNUNET_TRANSPORT_PluginEnvironment *env;
216
217 /**
218 * Session of peers with whom we are currently connected,
219 * map of peer identity to 'struct PeerSession'.
220 */
221 struct GNUNET_CONTAINER_MultiHashMap *sessions;
222
223 /**
224 * Heap with all of our defragmentation activities.
225 */
226 struct GNUNET_CONTAINER_Heap *defrags;
227
228 /**
229 * ID of select task
230 */
231 GNUNET_SCHEDULER_TaskIdentifier select_task;
232
233 /**
234 * Tokenizer for inbound messages.
235 */
236 struct GNUNET_SERVER_MessageStreamTokenizer *mst;
237
238 /**
239 * Bandwidth tracker to limit global UDP traffic.
240 */
241 struct GNUNET_BANDWIDTH_Tracker tracker;
242
243 /**
244 * Address we were told to bind to exclusively (IPv4).
245 */
246 char *bind4_address;
247
248 /**
249 * Address we were told to bind to exclusively (IPv6).
250 */
251 char *bind6_address;
252
253 /**
254 * Handle to NAT traversal support.
255 */
256 struct GNUNET_NAT_Handle *nat;
257
258 /**
259 * FD Read set
260 */
261 struct GNUNET_NETWORK_FDSet *rs;
262
263 /**
264 * The read socket for IPv4
265 */
266 struct GNUNET_NETWORK_Handle *sockv4;
267
268 /**
269 * The read socket for IPv6
270 */
271 struct GNUNET_NETWORK_Handle *sockv6;
272
273 /**
274 * expected delay for ACKs
275 */
276 struct GNUNET_TIME_Relative last_expected_delay;
277
278 /**
279 * Port we listen on.
280 */
281 uint16_t port;
282
283 /**
284 * Port we advertise on.
285 */
286 uint16_t aport;
287
288};
289
290
291/**
292 * Lookup the session for the given peer.
293 *
294 * @param plugin the plugin
295 * @param peer peer's identity
296 * @return NULL if we have no session
297 */
298struct PeerSession *
299find_session (struct Plugin *plugin,
300 const struct GNUNET_PeerIdentity *peer)
301{
302 return GNUNET_CONTAINER_multihashmap_get (plugin->sessions,
303 &peer->hashPubKey);
304}
305
306
307/**
308 * Disconnect from a remote node. Clean up session if we have one for this peer
309 *
310 * @param cls closure for this call (should be handle to Plugin)
311 * @param target the peeridentity of the peer to disconnect
312 * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
313 */
314static void
315udp_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
316{
317 struct Plugin *plugin = cls;
318 struct PeerSession *session;
319
320 session = find_session (plugin, target);
321 if (NULL == session)
322 return;
323 GNUNET_assert (GNUNET_OK ==
324 GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
325 &target->hashPubKey,
326 session));
327 plugin->last_expected_delay = GNUNET_FRAGMENT_context_destroy (session->frag);
328 session->cont (session->cont_cls, target, GNUNET_SYSERR);
329 GNUNET_free (session);
330}
331
332
333/**
334 * Actually send out the message.
335 *
336 * @param plugin the plugin
337 * @param send_handle which handle to send message on
338 * @param target who should receive this message (ignored by UDP)
339 * @param msgbuf one or more GNUNET_MessageHeader(s) strung together
340 * @param msgbuf_size the size of the msgbuf to send
341 * @param priority how important is the message (ignored by UDP)
342 * @param timeout when should we time out (give up) if we can not transmit?
343 * @param addr the addr to send the message to, needs to be a sockaddr for us
344 * @param addrlen the len of addr
345 * @param cont continuation to call once the message has
346 * been transmitted (or if the transport is ready
347 * for the next transmission call; or if the
348 * peer disconnected...)
349 * @param cont_cls closure for cont
350 * @return the number of bytes written
351 */
352static ssize_t
353udp_send (struct Plugin *plugin,
354 const struct sockaddr *sa,
355 const struct GNUNET_MessageHeader *msg)
356{
357 ssize_t sent;
358 size_t slen;
359
360 switch (sa->sa_family)
361 {
362 case AF_INET:
363 sent =
364 GNUNET_NETWORK_socket_sendto (plugin->sockv4,
365 msg,
366 ntohs (msg->size),
367 sa,
368 slen = sizeof (struct sockaddr_in));
369 break;
370 case AF_INET6:
371 sent =
372 GNUNET_NETWORK_socket_sendto (plugin->sockv6,
373 msg,
374 ntohs (msg->size),
375 sa,
376 slen = sizeof (struct sockaddr_in6));
377 break;
378 default:
379 GNUNET_break (0);
380 return 0;
381 }
382 if (GNUNET_SYSERR == sent)
383 GNUNET_log_strerror (GNUNET_ERROR_TYPE_INFO,
384 "sendto");
385#if DEBUG_UDP
386 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
387 "UDP transmited %u-byte message to %s (%d: %s)\n",
388 (unsigned int) ntohs (msg->size),
389 GNUNET_a2s (sa, slen),
390 (int) sent,
391 (sent < 0) ? STRERROR (errno) : "ok");
392#endif
393 return sent;
394}
395
396
397/**
398 * Function that is called with messages created by the fragmentation
399 * module. In the case of the 'proc' callback of the
400 * GNUNET_FRAGMENT_context_create function, this function must
401 * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
402 *
403 * @param cls closure, the 'struct PeerSession'
404 * @param msg the message that was created
405 */
406static void
407send_fragment (void *cls,
408 const struct GNUNET_MessageHeader *msg)
409{
410 struct PeerSession *session = cls;
411
412 udp_send (session->plugin,
413 session->sock_addr,
414 msg);
415 GNUNET_FRAGMENT_context_transmission_done (session->frag);
416}
417
418
419/**
420 * Function that can be used by the transport service to transmit
421 * a message using the plugin.
422 *
423 * @param cls closure
424 * @param target who should receive this message (ignored by UDP)
425 * @param msgbuf one or more GNUNET_MessageHeader(s) strung together
426 * @param msgbuf_size the size of the msgbuf to send
427 * @param priority how important is the message (ignored by UDP)
428 * @param timeout when should we time out (give up) if we can not transmit?
429 * @param session identifier used for this session (NULL for UDP)
430 * @param addr the addr to send the message to
431 * @param addrlen the len of addr
432 * @param force_address not used, we had better have an address to send to
433 * because we are stateless!!
434 * @param cont continuation to call once the message has
435 * been transmitted (or if the transport is ready
436 * for the next transmission call; or if the
437 * peer disconnected...)
438 * @param cont_cls closure for cont
439 *
440 * @return the number of bytes written (may return 0 and the message can
441 * still be transmitted later!)
442 */
443static ssize_t
444udp_plugin_send (void *cls,
445 const struct GNUNET_PeerIdentity *target,
446 const char *msgbuf,
447 size_t msgbuf_size,
448 unsigned int priority,
449 struct GNUNET_TIME_Relative timeout,
450 struct Session *session,
451 const void *addr,
452 size_t addrlen,
453 int force_address,
454 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
455{
456 struct Plugin *plugin = cls;
457 struct PeerSession *peer_session;
458 const struct IPv4UdpAddress *t4;
459 const struct IPv6UdpAddress *t6;
460 struct sockaddr_in *v4;
461 struct sockaddr_in6 *v6;
462 size_t mlen = msgbuf_size + sizeof (struct UDPMessage);
463 char mbuf[mlen];
464 struct UDPMessage *udp;
465
466 if (force_address == GNUNET_SYSERR)
467 return GNUNET_SYSERR;
468 GNUNET_assert (NULL == session);
469 if (mlen >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
470 {
471 GNUNET_break (0);
472 return GNUNET_SYSERR;
473 }
474 switch (addrlen)
475 {
476 case sizeof(struct IPv4UdpAddress):
477 t4 = addr;
478 peer_session = GNUNET_malloc (sizeof (struct PeerSession) + sizeof (struct sockaddr_in));
479 v4 = (struct sockaddr_in*) &peer_session[1];
480 v4->sin_family = AF_INET;
481#if HAVE_SOCKADDR_IN_SIN_LEN
482 v4->sin_len = sizeof (struct sockaddr_in);
483#endif
484 v4->sin_port = t4->u4_port;
485 v4->sin_addr.s_addr = t4->ipv4_addr;
486 break;
487 case sizeof(struct IPv6UdpAddress):
488 t6 = addr;
489 peer_session = GNUNET_malloc (sizeof (struct PeerSession) + sizeof (struct sockaddr_in6));
490 v6 = (struct sockaddr_in6*) &peer_session[1];
491 v6->sin6_family = AF_INET6;
492#if HAVE_SOCKADDR_IN_SIN_LEN
493 v6->sin6_len = sizeof (struct sockaddr_in6);
494#endif
495 v6->sin6_port = t6->u6_port;
496 v6->sin6_addr = t6->ipv6_addr;
497 break;
498 default:
499 /* Must have a valid address to send to */
500 GNUNET_break_op(0);
501 return GNUNET_SYSERR;
502 }
503 udp = (struct UDPMessage*) mbuf;
504 udp->header.size = htons (mlen);
505 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE);
506 udp->reserved = htonl (0);
507 udp->sender = *plugin->env->my_identity;
508 memcpy (&udp[1], msgbuf, msgbuf_size);
509 peer_session->target = *target;
510 peer_session->plugin = plugin;
511 peer_session->sock_addr = (const struct sockaddr*) &peer_session[1];
512 peer_session->cont = cont;
513 peer_session->cont_cls = cont_cls;
514 if (mlen <= UDP_MTU)
515 {
516 mlen = udp_send (plugin,
517 peer_session->sock_addr,
518 &udp->header);
519 cont (cont_cls, target, (mlen > 0) ? GNUNET_OK : GNUNET_SYSERR);
520 GNUNET_free (peer_session);
521 }
522 else
523 {
524 GNUNET_assert (GNUNET_OK ==
525 GNUNET_CONTAINER_multihashmap_put (plugin->sessions,
526 &target->hashPubKey,
527 peer_session,
528 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
529 peer_session->frag = GNUNET_FRAGMENT_context_create (plugin->env->stats,
530 UDP_MTU,
531 &plugin->tracker,
532 plugin->last_expected_delay,
533 &udp->header,
534 &send_fragment,
535 peer_session);
536 }
537 return mlen;
538}
539
540
541/**
542 * Closure for 'process_inbound_tokenized_messages'
543 */
544struct SourceInformation
545{
546 /**
547 * Sender identity.
548 */
549 struct GNUNET_PeerIdentity sender;
550
551 /**
552 * Source address.
553 */
554 const void *arg;
555
556 /**
557 * Number of bytes in source address.
558 */
559 size_t args;
560};
561
562
563/**
564 * Message tokenizer has broken up an incomming message. Pass it on
565 * to the service.
566 *
567 * @param cls the 'struct Plugin'
568 * @param client the 'struct SourceInformation'
569 * @param hdr the actual message
570 */
571static void
572process_inbound_tokenized_messages (void *cls,
573 void *client,
574 const struct GNUNET_MessageHeader *hdr)
575{
576 struct Plugin *plugin = cls;
577 struct SourceInformation* si = client;
578 struct GNUNET_TRANSPORT_ATS_Information distance[2];
579
580 /* setup ATS */
581 distance[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
582 distance[0].value = htonl (1);
583 distance[1].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
584 distance[1].value = htonl (0);
585
586 plugin->env->receive (plugin->env->cls,
587 &si->sender,
588 hdr,
589 distance, 2,
590 NULL,
591 si->arg, si->args);
592}
593
594
595/**
596 * We've received a UDP Message. Process it (pass contents to main service).
597 *
598 * @param plugin plugin context
599 * @param msg the message
600 * @param sender_addr sender address
601 * @param sender_addr_len number of bytes in sender_addr
602 */
603static void
604process_udp_message (struct Plugin *plugin,
605 const struct UDPMessage *msg,
606 const struct sockaddr *sender_addr,
607 socklen_t sender_addr_len)
608{
609 struct SourceInformation si;
610 struct IPv4UdpAddress u4;
611 struct IPv6UdpAddress u6;
612 const void *arg;
613 size_t args;
614
615 if (0 != ntohl (msg->reserved))
616 {
617 GNUNET_break_op (0);
618 return;
619 }
620 if (ntohs (msg->header.size) < sizeof (struct GNUNET_MessageHeader) + sizeof (struct UDPMessage))
621 {
622 GNUNET_break_op (0);
623 return;
624 }
625
626 /* convert address */
627 switch (sender_addr->sa_family)
628 {
629 case AF_INET:
630 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in));
631 u4.ipv4_addr = ((struct sockaddr_in *) sender_addr)->sin_addr.s_addr;
632 u4.u4_port = ((struct sockaddr_in *) sender_addr)->sin_port;
633 arg = &u4;
634 args = sizeof (u4);
635 break;
636 case AF_INET6:
637 GNUNET_assert (sender_addr_len == sizeof (struct sockaddr_in6));
638 u6.ipv6_addr = ((struct sockaddr_in6*) sender_addr)->sin6_addr;
639 u6.u6_port = ((struct sockaddr_in6 *) sender_addr)->sin6_port;
640 arg = &u6;
641 args = sizeof (u6);
642 break;
643 default:
644 GNUNET_break (0);
645 return;
646 }
647#if DEBUG_UDP
648 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
649 "udp",
650 "Received message with %u bytes from peer `%s' at `%s'\n",
651 (unsigned int) ntohs (msg->header.size),
652 GNUNET_i2s (&msg->sender),
653 GNUNET_a2s (sender_addr, sender_addr_len));
654#endif
655
656 /* iterate over all embedded messages */
657 si.sender = msg->sender;
658 si.arg = arg;
659 si.args = args;
660 GNUNET_SERVER_mst_receive (plugin->mst,
661 &si,
662 (const char*) &msg[1],
663 ntohs (msg->header.size) - sizeof (struct UDPMessage),
664 GNUNET_YES,
665 GNUNET_NO);
666}
667
668
669/**
670 * Process a defragmented message.
671 *
672 * @param cls the 'struct ReceiveContext'
673 * @param msg the message
674 */
675static void
676fragment_msg_proc (void *cls,
677 const struct GNUNET_MessageHeader *msg)
678{
679 struct ReceiveContext *rc = cls;
680
681 if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE)
682 {
683 GNUNET_break (0);
684 return;
685 }
686 if (ntohs (msg->size) < sizeof(struct UDPMessage))
687 {
688 GNUNET_break (0);
689 return;
690 }
691 process_udp_message (rc->plugin,
692 (const struct UDPMessage*) msg,
693 rc->src_addr,
694 rc->addr_len);
695}
696
697
698/**
699 * Transmit an acknowledgement.
700 *
701 * @param cls the 'struct ReceiveContext'
702 * @param id message ID (unused)
703 * @param msg ack to transmit
704 */
705static void
706ack_proc (void *cls,
707 uint32_t id,
708 const struct GNUNET_MessageHeader *msg)
709{
710 struct ReceiveContext *rc = cls;
711 size_t msize = sizeof (struct UDPMessage) + ntohs (msg->size);
712 char buf[msize];
713 struct UDPMessage *udp;
714
715#if DEBUG_UDP
716 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
717 "udp",
718 "Sending ACK to `%s'\n",
719 GNUNET_a2s (rc->src_addr,
720 (rc->src_addr->sa_family == AF_INET)
721 ? sizeof (struct sockaddr_in)
722 : sizeof (struct sockaddr_in6)));
723#endif
724 udp = (struct UDPMessage*) buf;
725 udp->header.size = htons ((uint16_t) msize);
726 udp->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK);
727 udp->reserved = htonl (0);
728 udp->sender = *rc->plugin->env->my_identity;
729 memcpy (&udp[1], msg, ntohs (msg->size));
730 (void) udp_send (rc->plugin,
731 rc->src_addr,
732 &udp->header);
733}
734
735
736/**
737 * Closure for 'find_receive_context'.
738 */
739struct FindReceiveContext
740{
741 /**
742 * Where to store the result.
743 */
744 struct ReceiveContext *rc;
745
746 /**
747 * Address to find.
748 */
749 const struct sockaddr *addr;
750
751 /**
752 * Number of bytes in 'addr'.
753 */
754 socklen_t addr_len;
755};
756
757
758/**
759 * Scan the heap for a receive context with the given address.
760 *
761 * @param cls the 'struct FindReceiveContext'
762 * @param node internal node of the heap
763 * @param element value stored at the node (a 'struct ReceiveContext')
764 * @param cost cost associated with the node
765 * @return GNUNET_YES if we should continue to iterate,
766 * GNUNET_NO if not.
767 */
768static int
769find_receive_context (void *cls,
770 struct GNUNET_CONTAINER_HeapNode *node,
771 void *element,
772 GNUNET_CONTAINER_HeapCostType cost)
773{
774 struct FindReceiveContext *frc = cls;
775 struct ReceiveContext *e = element;
776
777 if ( (frc->addr_len == e->addr_len) &&
778 (0 == memcmp (frc->addr,
779 e->src_addr,
780 frc->addr_len) ) )
781 {
782 frc->rc = e;
783 return GNUNET_NO;
784 }
785 return GNUNET_YES;
786}
787
788
789/**
790 * Read and process a message from the given socket.
791 *
792 * @param plugin the overall plugin
793 * @param rsock socket to read from
794 */
795static void
796udp_read (struct Plugin *plugin,
797 struct GNUNET_NETWORK_Handle *rsock)
798{
799 socklen_t fromlen;
800 char addr[32];
801 char buf[65536];
802 ssize_t ret;
803 const struct GNUNET_MessageHeader *msg;
804 const struct GNUNET_MessageHeader *ack;
805 struct PeerSession *peer_session;
806 const struct UDPMessage *udp;
807 struct ReceiveContext *rc;
808 struct GNUNET_TIME_Absolute now;
809 struct FindReceiveContext frc;
810
811 fromlen = sizeof (addr);
812 memset (&addr, 0, sizeof(addr));
813 ret = GNUNET_NETWORK_socket_recvfrom (rsock, buf, sizeof (buf),
814 (struct sockaddr *)&addr, &fromlen);
815 if (ret < sizeof (struct GNUNET_MessageHeader))
816 {
817 GNUNET_break_op (0);
818 return;
819 }
820#if DEBUG_UDP
821 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
822 "UDP received %u-byte message from `%s'\n",
823 (unsigned int) ret,
824 GNUNET_a2s ((const struct sockaddr*) addr, fromlen));
825#endif
826 msg = (const struct GNUNET_MessageHeader *) buf;
827 if (ret != ntohs (msg->size))
828 {
829 GNUNET_break_op (0);
830 return;
831 }
832 switch (ntohs (msg->type))
833 {
834 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_MESSAGE:
835 if (ntohs (msg->size) < sizeof (struct UDPMessage))
836 {
837 GNUNET_break_op (0);
838 return;
839 }
840 process_udp_message (plugin,
841 (const struct UDPMessage *) msg,
842 (const struct sockaddr*) addr,
843 fromlen);
844 return;
845 case GNUNET_MESSAGE_TYPE_TRANSPORT_UDP_ACK:
846 if (ntohs (msg->size) < sizeof (struct UDPMessage) + sizeof (struct GNUNET_MessageHeader))
847 {
848 GNUNET_break_op (0);
849 return;
850 }
851 udp = (const struct UDPMessage *) msg;
852 if (ntohl (udp->reserved) != 0)
853 {
854 GNUNET_break_op (0);
855 return;
856 }
857 ack = (const struct GNUNET_MessageHeader*) &udp[1];
858 if (ntohs (ack->size) != ntohs (msg->size) - sizeof (struct UDPMessage))
859 {
860 GNUNET_break_op (0);
861 return;
862 }
863#if DEBUG_UDP
864 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
865 "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
866 (unsigned int) ntohs (msg->size),
867 GNUNET_i2s (&udp->sender),
868 GNUNET_a2s ((const struct sockaddr*) addr, fromlen));
869#endif
870
871 peer_session = find_session (plugin, &udp->sender);
872 if (NULL == peer_session)
873 {
874#if DEBUG_UDP
875 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
876 "Session for ACK not found, dropping ACK!\n");
877#endif
878 return;
879 }
880 if (GNUNET_OK !=
881 GNUNET_FRAGMENT_process_ack (peer_session->frag,
882 ack))
883 return;
884 GNUNET_assert (GNUNET_OK ==
885 GNUNET_CONTAINER_multihashmap_remove (plugin->sessions,
886 &udp->sender.hashPubKey,
887 peer_session));
888 GNUNET_FRAGMENT_context_destroy (peer_session->frag);
889 peer_session->cont (peer_session->cont_cls,
890 &udp->sender,
891 GNUNET_OK);
892 GNUNET_free (peer_session);
893 return;
894 case GNUNET_MESSAGE_TYPE_FRAGMENT:
895 frc.rc = NULL;
896 frc.addr = (const struct sockaddr*) addr;
897 frc.addr_len = fromlen;
898 GNUNET_CONTAINER_heap_iterate (plugin->defrags,
899 &find_receive_context,
900 &frc);
901 now = GNUNET_TIME_absolute_get ();
902 rc = frc.rc;
903 if (rc == NULL)
904 {
905 /* need to create a new RC */
906 rc = GNUNET_malloc (sizeof (struct ReceiveContext) + fromlen);
907 memcpy (&rc[1], addr, fromlen);
908 rc->src_addr = (const struct sockaddr*) &rc[1];
909 rc->addr_len = fromlen;
910 rc->plugin = plugin;
911 rc->defrag = GNUNET_DEFRAGMENT_context_create (plugin->env->stats,
912 UDP_MTU,
913 UDP_MAX_MESSAGES_IN_DEFRAG,
914 rc,
915 &fragment_msg_proc,
916 &ack_proc);
917 rc->hnode = GNUNET_CONTAINER_heap_insert (plugin->defrags,
918 rc,
919 (GNUNET_CONTAINER_HeapCostType) now.abs_value);
920 }
921#if DEBUG_UDP
922 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
923 "UDP processes %u-byte fragment from `%s'\n",
924 (unsigned int) ntohs (msg->size),
925 GNUNET_a2s ((const struct sockaddr*) addr, fromlen));
926#endif
927
928 if (GNUNET_OK ==
929 GNUNET_DEFRAGMENT_process_fragment (rc->defrag,
930 msg))
931 {
932 /* keep this 'rc' from expiring */
933 GNUNET_CONTAINER_heap_update_cost (plugin->defrags,
934 rc->hnode,
935 (GNUNET_CONTAINER_HeapCostType) now.abs_value);
936 }
937 if (GNUNET_CONTAINER_heap_get_size (plugin->defrags) > UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG)
938 {
939 /* remove 'rc' that was inactive the longest */
940 rc = GNUNET_CONTAINER_heap_remove_root (plugin->defrags);
941 GNUNET_DEFRAGMENT_context_destroy (rc->defrag);
942 GNUNET_free (rc);
943 }
944 return;
945 default:
946 GNUNET_break_op (0);
947 return;
948 }
949}
950
951
952/**
953 * We have been notified that our writeset has something to read. We don't
954 * know which socket needs to be read, so we have to check each one
955 * Then reschedule this function to be called again once more is available.
956 *
957 * @param cls the plugin handle
958 * @param tc the scheduling context (for rescheduling this function again)
959 */
960static void
961udp_plugin_select (void *cls,
962 const struct GNUNET_SCHEDULER_TaskContext *tc)
963{
964 struct Plugin *plugin = cls;
965
966 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
967 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
968 return;
969 if (GNUNET_NETWORK_fdset_isset (tc->read_ready,
970 plugin->sockv4))
971 udp_read (plugin, plugin->sockv4);
972 if (GNUNET_NETWORK_fdset_isset (tc->read_ready,
973 plugin->sockv6))
974 udp_read (plugin, plugin->sockv6);
975 plugin->select_task =
976 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
977 GNUNET_SCHEDULER_NO_TASK,
978 GNUNET_TIME_UNIT_FOREVER_REL, plugin->rs,
979 NULL, &udp_plugin_select, plugin);
980
981}
982
983
984/**
985 * Check if the given port is plausible (must be either our listen
986 * port or our advertised port). If it is neither, we return
987 * GNUNET_SYSERR.
988 *
989 * @param plugin global variables
990 * @param in_port port number to check
991 * @return GNUNET_OK if port is either open_port or adv_port
992 */
993static int
994check_port (struct Plugin *plugin, uint16_t in_port)
995{
996 if ( (in_port == plugin->port) ||
997 (in_port == plugin->aport) )
998 return GNUNET_OK;
999 return GNUNET_SYSERR;
1000}
1001
1002
1003/**
1004 * Function that will be called to check if a binary address for this
1005 * plugin is well-formed and corresponds to an address for THIS peer
1006 * (as per our configuration). Naturally, if absolutely necessary,
1007 * plugins can be a bit conservative in their answer, but in general
1008 * plugins should make sure that the address does not redirect
1009 * traffic to a 3rd party that might try to man-in-the-middle our
1010 * traffic.
1011 *
1012 * @param cls closure, should be our handle to the Plugin
1013 * @param addr pointer to the address
1014 * @param addrlen length of addr
1015 * @return GNUNET_OK if this is a plausible address for this peer
1016 * and transport, GNUNET_SYSERR if not
1017 *
1018 */
1019static int
1020udp_plugin_check_address (void *cls,
1021 const void *addr,
1022 size_t addrlen)
1023{
1024 struct Plugin *plugin = cls;
1025 struct IPv4UdpAddress *v4;
1026 struct IPv6UdpAddress *v6;
1027
1028 if ((addrlen != sizeof (struct IPv4UdpAddress)) &&
1029 (addrlen != sizeof (struct IPv6UdpAddress)))
1030 {
1031 GNUNET_break_op (0);
1032 return GNUNET_SYSERR;
1033 }
1034 if (addrlen == sizeof (struct IPv4UdpAddress))
1035 {
1036 v4 = (struct IPv4UdpAddress *) addr;
1037 if (GNUNET_OK !=
1038 check_port (plugin, ntohs (v4->u4_port)))
1039 return GNUNET_SYSERR;
1040 if (GNUNET_OK !=
1041 GNUNET_NAT_test_address (plugin->nat,
1042 &v4->ipv4_addr, sizeof (struct in_addr)))
1043 return GNUNET_SYSERR;
1044 }
1045 else
1046 {
1047 v6 = (struct IPv6UdpAddress *) addr;
1048 if (IN6_IS_ADDR_LINKLOCAL (&v6->ipv6_addr))
1049 {
1050 GNUNET_break_op (0);
1051 return GNUNET_SYSERR;
1052 }
1053 if (GNUNET_OK !=
1054 check_port (plugin, ntohs (v6->u6_port)))
1055 return GNUNET_SYSERR;
1056 if (GNUNET_OK !=
1057 GNUNET_NAT_test_address (plugin->nat,
1058 &v6->ipv6_addr, sizeof (struct in6_addr)))
1059 return GNUNET_SYSERR;
1060 }
1061 return GNUNET_OK;
1062}
1063
1064
1065/**
1066 * Function called for a quick conversion of the binary address to
1067 * a numeric address. Note that the caller must not free the
1068 * address and that the next call to this function is allowed
1069 * to override the address again.
1070 *
1071 * @param cls closure
1072 * @param addr binary address
1073 * @param addrlen length of the address
1074 * @return string representing the same address
1075 */
1076static const char*
1077udp_address_to_string (void *cls,
1078 const void *addr,
1079 size_t addrlen)
1080{
1081 static char rbuf[INET6_ADDRSTRLEN + 10];
1082 char buf[INET6_ADDRSTRLEN];
1083 const void *sb;
1084 struct in_addr a4;
1085 struct in6_addr a6;
1086 const struct IPv4UdpAddress *t4;
1087 const struct IPv6UdpAddress *t6;
1088 int af;
1089 uint16_t port;
1090
1091 if (addrlen == sizeof (struct IPv6UdpAddress))
1092 {
1093 t6 = addr;
1094 af = AF_INET6;
1095 port = ntohs (t6->u6_port);
1096 memcpy (&a6, &t6->ipv6_addr, sizeof (a6));
1097 sb = &a6;
1098 }
1099 else if (addrlen == sizeof (struct IPv4UdpAddress))
1100 {
1101 t4 = addr;
1102 af = AF_INET;
1103 port = ntohs (t4->u4_port);
1104 memcpy (&a4, &t4->ipv4_addr, sizeof (a4));
1105 sb = &a4;
1106 }
1107 else
1108 {
1109 GNUNET_break_op (0);
1110 return NULL;
1111 }
1112 inet_ntop (af, sb, buf, INET6_ADDRSTRLEN);
1113 GNUNET_snprintf (rbuf,
1114 sizeof (rbuf),
1115 "%s:%u",
1116 buf,
1117 port);
1118 return rbuf;
1119}
1120
1121
1122/**
1123 * Closure for 'append_port'.
1124 */
1125struct PrettyPrinterContext
1126{
1127 /**
1128 * Function to call with the result.
1129 */
1130 GNUNET_TRANSPORT_AddressStringCallback asc;
1131
1132 /**
1133 * Clsoure for 'asc'.
1134 */
1135 void *asc_cls;
1136
1137 /**
1138 * Port to add after the IP address.
1139 */
1140 uint16_t port;
1141};
1142
1143
1144/**
1145 * Append our port and forward the result.
1146 *
1147 * @param cls a 'struct PrettyPrinterContext'
1148 * @param hostname result from DNS resolver
1149 */
1150static void
1151append_port (void *cls, const char *hostname)
1152{
1153 struct PrettyPrinterContext *ppc = cls;
1154 char *ret;
1155
1156 if (hostname == NULL)
1157 {
1158 ppc->asc (NULL, ret);
1159 GNUNET_free (ppc);
1160 return;
1161 }
1162 GNUNET_asprintf (&ret,
1163 "%s:%d",
1164 hostname,
1165 ppc->port);
1166 ppc->asc (ppc->asc_cls, ret);
1167 GNUNET_free (ret);
1168}
1169
1170
1171/**
1172 * Convert the transports address to a nice, human-readable
1173 * format.
1174 *
1175 * @param cls closure
1176 * @param type name of the transport that generated the address
1177 * @param addr one of the addresses of the host, NULL for the last address
1178 * the specific address format depends on the transport
1179 * @param addrlen length of the address
1180 * @param numeric should (IP) addresses be displayed in numeric form?
1181 * @param timeout after how long should we give up?
1182 * @param asc function to call on each string
1183 * @param asc_cls closure for asc
1184 */
1185static void
1186udp_plugin_address_pretty_printer (void *cls,
1187 const char *type,
1188 const void *addr,
1189 size_t addrlen,
1190 int numeric,
1191 struct GNUNET_TIME_Relative timeout,
1192 GNUNET_TRANSPORT_AddressStringCallback asc,
1193 void *asc_cls)
1194{
1195 struct PrettyPrinterContext *ppc;
1196 const void *sb;
1197 size_t sbs;
1198 struct sockaddr_in a4;
1199 struct sockaddr_in6 a6;
1200 const struct IPv4UdpAddress *u4;
1201 const struct IPv6UdpAddress *u6;
1202 uint16_t port;
1203
1204 if (addrlen == sizeof (struct IPv6UdpAddress))
1205 {
1206 u6 = addr;
1207 memset (&a6, 0, sizeof (a6));
1208 a6.sin6_family = AF_INET6;
1209#if HAVE_SOCKADDR_IN_SIN_LEN
1210 a6.sin6_len = sizeof (a6);
1211#endif
1212 a6.sin6_port = u6->u6_port;
1213 memcpy (&a6.sin6_addr,
1214 &u6->ipv6_addr,
1215 sizeof (struct in6_addr));
1216 port = ntohs (u6->u6_port);
1217 sb = &a6;
1218 sbs = sizeof (a6);
1219 }
1220 else if (addrlen == sizeof (struct IPv4UdpAddress))
1221 {
1222 u4 = addr;
1223 memset (&a4, 0, sizeof (a4));
1224 a4.sin_family = AF_INET;
1225#if HAVE_SOCKADDR_IN_SIN_LEN
1226 a4.sin_len = sizeof (a4);
1227#endif
1228 a4.sin_port = u4->u4_port;
1229 a4.sin_addr.s_addr = u4->ipv4_addr;
1230 port = ntohs (u4->u4_port);
1231 sb = &a4;
1232 sbs = sizeof (a4);
1233 }
1234 else
1235 {
1236 /* invalid address */
1237 GNUNET_break_op (0);
1238 asc (asc_cls, NULL);
1239 return;
1240 }
1241 ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
1242 ppc->asc = asc;
1243 ppc->asc_cls = asc_cls;
1244 ppc->port = port;
1245 GNUNET_RESOLVER_hostname_get (sb,
1246 sbs,
1247 !numeric, timeout,
1248 &append_port, ppc);
1249}
1250
1251
1252/**
1253 * Our external IP address/port mapping has changed.
1254 *
1255 * @param cls closure, the 'struct LocalAddrList'
1256 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1257 * the previous (now invalid) one
1258 * @param addr either the previous or the new public IP address
1259 * @param addrlen actual lenght of the address
1260 */
1261static void
1262udp_nat_port_map_callback (void *cls,
1263 int add_remove,
1264 const struct sockaddr *addr,
1265 socklen_t addrlen)
1266{
1267 struct Plugin *plugin = cls;
1268 struct IPv4UdpAddress u4;
1269 struct IPv6UdpAddress u6;
1270 void *arg;
1271 size_t args;
1272
1273 /* convert 'addr' to our internal format */
1274 switch (addr->sa_family)
1275 {
1276 case AF_INET:
1277 GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
1278 u4.ipv4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1279 u4.u4_port = ((struct sockaddr_in *) addr)->sin_port;
1280 arg = &u4;
1281 args = sizeof (u4);
1282 break;
1283 case AF_INET6:
1284 GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
1285 memcpy (&u6.ipv6_addr,
1286 &((struct sockaddr_in6 *) addr)->sin6_addr,
1287 sizeof (struct in6_addr));
1288 u6.u6_port = ((struct sockaddr_in6 *) addr)->sin6_port;
1289 arg = &u6;
1290 args = sizeof (u6);
1291 break;
1292 default:
1293 GNUNET_break (0);
1294 return;
1295 }
1296 /* modify our published address list */
1297 plugin->env->notify_address (plugin->env->cls,
1298 add_remove,
1299 arg, args);
1300}
1301
1302
1303/**
1304 * The exported method. Makes the core api available via a global and
1305 * returns the udp transport API.
1306 *
1307 * @param cls our 'struct GNUNET_TRANSPORT_PluginEnvironment'
1308 * @return our 'struct GNUNET_TRANSPORT_PluginFunctions'
1309 */
1310void *
1311libgnunet_plugin_transport_udp_init (void *cls)
1312{
1313 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1314 unsigned long long port;
1315 unsigned long long aport;
1316 struct GNUNET_TRANSPORT_PluginFunctions *api;
1317 struct Plugin *plugin;
1318 int sockets_created;
1319 struct sockaddr_in serverAddrv4;
1320 struct sockaddr_in6 serverAddrv6;
1321 struct sockaddr *serverAddr;
1322 struct sockaddr *addrs[2];
1323 socklen_t addrlens[2];
1324 socklen_t addrlen;
1325 unsigned int tries;
1326 unsigned long long udp_max_bps;
1327
1328 if (GNUNET_OK !=
1329 GNUNET_CONFIGURATION_get_value_number (env->cfg,
1330 "transport-udp",
1331 "PORT",
1332 &port))
1333 port = 2086;
1334 if (GNUNET_OK !=
1335 GNUNET_CONFIGURATION_get_value_number (env->cfg,
1336 "transport-udp",
1337 "MAX_BPS",
1338 &udp_max_bps))
1339 udp_max_bps = 1024 * 1024 * 100; /* 100 MB/s == infinity for practical purposes */
1340 if (GNUNET_OK !=
1341 GNUNET_CONFIGURATION_get_value_number (env->cfg,
1342 "transport-udp",
1343 "ADVERTISED_PORT",
1344 &aport))
1345 aport = port;
1346 if (port > 65535)
1347 {
1348 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1349 _("Given `%s' option is out of range: %llu > %u\n"),
1350 "PORT",
1351 port,
1352 65535);
1353 return NULL;
1354 }
1355 memset (&serverAddrv6, 0, sizeof (serverAddrv6));
1356 memset (&serverAddrv4, 0, sizeof (serverAddrv4));
1357
1358 plugin = GNUNET_malloc (sizeof (struct Plugin));
1359 GNUNET_BANDWIDTH_tracker_init (&plugin->tracker,
1360 GNUNET_BANDWIDTH_value_init ((uint32_t) udp_max_bps),
1361 30);
1362 plugin->last_expected_delay = GNUNET_TIME_UNIT_SECONDS;
1363 plugin->port = port;
1364 plugin->aport = aport;
1365 plugin->env = env;
1366 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1367 api->cls = plugin;
1368
1369 api->send = &udp_plugin_send;
1370 api->disconnect = &udp_disconnect;
1371 api->address_pretty_printer = &udp_plugin_address_pretty_printer;
1372 api->address_to_string = &udp_address_to_string;
1373 api->check_address = &udp_plugin_check_address;
1374
1375 if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string(env->cfg,
1376 "transport-udp",
1377 "BINDTO",
1378 &plugin->bind4_address))
1379 {
1380 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1381 "Binding udp plugin to specific address: `%s'\n",
1382 plugin->bind4_address);
1383 if (1 != inet_pton(AF_INET,
1384 plugin->bind4_address,
1385 &serverAddrv4.sin_addr))
1386 {
1387 GNUNET_free (plugin->bind4_address);
1388 GNUNET_free (plugin);
1389 return NULL;
1390 }
1391 }
1392
1393 if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string(env->cfg,
1394 "transport-udp",
1395 "BINDTO6",
1396 &plugin->bind6_address))
1397 {
1398 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1399 "Binding udp plugin to specific address: `%s'\n",
1400 plugin->bind6_address);
1401 if (1 != inet_pton(AF_INET6,
1402 plugin->bind6_address,
1403 &serverAddrv6.sin6_addr))
1404 {
1405 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1406 _("Invalid IPv6 address: `%s'\n"),
1407 plugin->bind6_address);
1408 GNUNET_free_non_null (plugin->bind4_address);
1409 GNUNET_free (plugin->bind6_address);
1410 GNUNET_free (plugin);
1411 return NULL;
1412 }
1413 }
1414
1415 plugin->defrags = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
1416 plugin->sessions = GNUNET_CONTAINER_multihashmap_create (UDP_MAX_SENDER_ADDRESSES_WITH_DEFRAG * 2);
1417 sockets_created = 0;
1418 if ( (GNUNET_YES !=
1419 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
1420 "nat",
1421 "DISABLEV6")))
1422 {
1423 plugin->sockv6 = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_DGRAM, 0);
1424 if (NULL == plugin->sockv6)
1425 {
1426 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
1427 }
1428 else
1429 {
1430#if HAVE_SOCKADDR_IN_SIN_LEN
1431 serverAddrv6.sin6_len = sizeof (serverAddrv6);
1432#endif
1433 serverAddrv6.sin6_family = AF_INET6;
1434 serverAddrv6.sin6_addr = in6addr_any;
1435 serverAddrv6.sin6_port = htons (plugin->port);
1436 addrlen = sizeof (serverAddrv6);
1437 serverAddr = (struct sockaddr *) &serverAddrv6;
1438#if DEBUG_UDP
1439 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1440 "Binding to IPv6 port %d\n",
1441 ntohs(serverAddrv6.sin6_port));
1442#endif
1443 tries = 0;
1444 while (GNUNET_NETWORK_socket_bind (plugin->sockv6,
1445 serverAddr, addrlen) !=
1446 GNUNET_OK)
1447 {
1448 serverAddrv6.sin6_port
1449 = htons (GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000); /* Find a good, non-root port */
1450#if DEBUG_UDP
1451 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1452 "IPv6 Binding failed, trying new port %d\n",
1453 ntohs(serverAddrv6.sin6_port));
1454#endif
1455 tries++;
1456 if (tries > 10)
1457 {
1458 GNUNET_NETWORK_socket_close (plugin->sockv6);
1459 plugin->sockv6 = NULL;
1460 break;
1461 }
1462 }
1463 if (plugin->sockv6 != NULL)
1464 {
1465 addrs[sockets_created] = (struct sockaddr*) &serverAddrv6;
1466 addrlens[sockets_created] = sizeof (serverAddrv6);
1467 sockets_created++;
1468 }
1469 }
1470 }
1471
1472 plugin->mst = GNUNET_SERVER_mst_create (&process_inbound_tokenized_messages,
1473 plugin);
1474 plugin->sockv4 = GNUNET_NETWORK_socket_create (PF_INET, SOCK_DGRAM, 0);
1475 if (NULL == plugin->sockv4)
1476 {
1477 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "socket");
1478 }
1479 else
1480 {
1481#if HAVE_SOCKADDR_IN_SIN_LEN
1482 serverAddrv4.sin_len = sizeof (serverAddrv4);
1483#endif
1484 serverAddrv4.sin_family = AF_INET;
1485 serverAddrv4.sin_addr.s_addr = INADDR_ANY;
1486 serverAddrv4.sin_port = htons (plugin->port);
1487 addrlen = sizeof (serverAddrv4);
1488 serverAddr = (struct sockaddr *) &serverAddrv4;
1489#if DEBUG_UDP
1490 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1491 "Binding to IPv4 port %d\n",
1492 ntohs(serverAddrv4.sin_port));
1493#endif
1494 tries = 0;
1495 while (GNUNET_NETWORK_socket_bind (plugin->sockv4, serverAddr, addrlen) !=
1496 GNUNET_OK)
1497 {
1498 serverAddrv4.sin_port = htons (GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_STRONG, 33537) + 32000); /* Find a good, non-root port */
1499#if DEBUG_UDP
1500 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1501 "IPv4 Binding failed, trying new port %d\n",
1502 ntohs(serverAddrv4.sin_port));
1503#endif
1504 tries++;
1505 if (tries > 10)
1506 {
1507 GNUNET_NETWORK_socket_close (plugin->sockv4);
1508 plugin->sockv4 = NULL;
1509 break;
1510 }
1511 }
1512 if (plugin->sockv4 != NULL)
1513 {
1514 addrs[sockets_created] = (struct sockaddr*) &serverAddrv4;
1515 addrlens[sockets_created] = sizeof (serverAddrv4);
1516 sockets_created++;
1517 }
1518 }
1519
1520 plugin->rs = GNUNET_NETWORK_fdset_create ();
1521 GNUNET_NETWORK_fdset_zero (plugin->rs);
1522 if (NULL != plugin->sockv4)
1523 GNUNET_NETWORK_fdset_set (plugin->rs,
1524 plugin->sockv4);
1525 if (NULL != plugin->sockv6)
1526 GNUNET_NETWORK_fdset_set (plugin->rs,
1527 plugin->sockv6);
1528
1529 plugin->select_task =
1530 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1531 GNUNET_SCHEDULER_NO_TASK,
1532 GNUNET_TIME_UNIT_FOREVER_REL, plugin->rs,
1533 NULL, &udp_plugin_select, plugin);
1534 if (sockets_created == 0)
1535 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1536 _("Failed to open UDP sockets\n"));
1537 plugin->nat = GNUNET_NAT_register (env->cfg,
1538 GNUNET_NO,
1539 port,
1540 sockets_created,
1541 (const struct sockaddr**) addrs, addrlens,
1542 &udp_nat_port_map_callback,
1543 NULL,
1544 plugin);
1545 return api;
1546}
1547
1548
1549/**
1550 * Destroy a session, plugin is being unloaded.
1551 *
1552 * @param cls unused
1553 * @param key hash of public key of target peer
1554 * @param value a 'struct PeerSession*' to clean up
1555 * @return GNUNET_OK (continue to iterate)
1556 */
1557static int
1558destroy_session (void *cls,
1559 const GNUNET_HashCode *key,
1560 void *value)
1561{
1562 struct PeerSession *peer_session = value;
1563
1564 GNUNET_FRAGMENT_context_destroy (peer_session->frag);
1565 GNUNET_free (peer_session);
1566 return GNUNET_OK;
1567}
1568
1569
1570/**
1571 * Shutdown the plugin.
1572 *
1573 * @param cls our 'struct GNUNET_TRANSPORT_PluginFunctions'
1574 * @return NULL
1575 */
1576void *
1577libgnunet_plugin_transport_udp_done (void *cls)
1578{
1579 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1580 struct Plugin *plugin = api->cls;
1581 struct ReceiveContext *rc;
1582
1583 /* FIXME: clean up heap and hashmap */
1584 GNUNET_CONTAINER_multihashmap_iterate (plugin->sessions,
1585 &destroy_session,
1586 NULL);
1587 GNUNET_CONTAINER_multihashmap_destroy (plugin->sessions);
1588 plugin->sessions = NULL;
1589 while (NULL != (rc = GNUNET_CONTAINER_heap_remove_root (plugin->defrags)))
1590 {
1591 GNUNET_DEFRAGMENT_context_destroy (rc->defrag);
1592 GNUNET_free (rc);
1593 }
1594 GNUNET_CONTAINER_heap_destroy (plugin->defrags);
1595
1596 if (plugin->select_task != GNUNET_SCHEDULER_NO_TASK)
1597 {
1598 GNUNET_SCHEDULER_cancel (plugin->select_task);
1599 plugin->select_task = GNUNET_SCHEDULER_NO_TASK;
1600 }
1601 if (plugin->sockv4 != NULL)
1602 {
1603 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv4));
1604 plugin->sockv4 = NULL;
1605 }
1606 if (plugin->sockv6 != NULL)
1607 {
1608 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (plugin->sockv6));
1609 plugin->sockv6 = NULL;
1610 }
1611 GNUNET_SERVER_mst_destroy (plugin->mst);
1612 GNUNET_NETWORK_fdset_destroy (plugin->rs);
1613 GNUNET_NAT_unregister (plugin->nat);
1614 plugin->nat = NULL;
1615 GNUNET_free (plugin);
1616 GNUNET_free (api);
1617 return NULL;
1618}
1619
1620/* end of plugin_transport_udp.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-27 08:25:06 +0000