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-rw-r--r--src/transport/plugin_transport_http_server.c3603
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diff --git a/src/transport/plugin_transport_http_server.c b/src/transport/plugin_transport_http_server.c
deleted file mode 100644
index 78b030e9a..000000000
--- a/src/transport/plugin_transport_http_server.c
+++ /dev/null
@@ -1,3603 +0,0 @@
1/*
2 This file is part of GNUnet
3 Copyright (C) 2002-2014, 2017 GNUnet e.V.
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your 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 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20
21/**
22 * @file transport/plugin_transport_http_server.c
23 * @brief HTTP/S server transport plugin
24 * @author Matthias Wachs
25 * @author David Barksdale
26 * @author Christian Grothoff
27 */
28#include "platform.h"
29#include "gnunet_util_lib.h"
30#include "gnunet_statistics_service.h"
31#include "gnunet_transport_plugin.h"
32#include "gnunet_nat_service.h"
33#include "plugin_transport_http_common.h"
34#include <microhttpd.h>
35#include <regex.h>
36#include "gnunet_mhd_compat.h"
37
38#if BUILD_HTTPS
39#define PLUGIN_NAME "https_server"
40#define LIBGNUNET_PLUGIN_TRANSPORT_INIT \
41 libgnunet_plugin_transport_https_server_init
42#define LIBGNUNET_PLUGIN_TRANSPORT_DONE \
43 libgnunet_plugin_transport_https_server_done
44#else
45#define PLUGIN_NAME "http_server"
46#define LIBGNUNET_PLUGIN_TRANSPORT_INIT \
47 libgnunet_plugin_transport_http_server_init
48#define LIBGNUNET_PLUGIN_TRANSPORT_DONE \
49 libgnunet_plugin_transport_http_server_done
50#endif
51
52#define HTTP_ERROR_RESPONSE \
53 "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\"><HTML><HEAD><TITLE>404 Not Found</TITLE></HEAD><BODY><H1>Not Found</H1>The requested URL was not found on this server.<P><HR><ADDRESS></ADDRESS></BODY></HTML>"
54#define _RECEIVE 0
55#define _SEND 1
56
57
58#define LOG(kind, ...) GNUNET_log_from (kind, "transport-" PLUGIN_NAME, \
59 __VA_ARGS__)
60
61
62/**
63 * Information we keep with MHD for an HTTP request.
64 */
65struct ServerRequest
66{
67 /**
68 * The session this server request belongs to
69 * Can be NULL, when session was disconnected and freed
70 */
71 struct GNUNET_ATS_Session *session;
72
73 /**
74 * The MHD connection
75 */
76 struct MHD_Connection *mhd_conn;
77
78 /**
79 * The MHD daemon
80 */
81 struct MHD_Daemon *mhd_daemon;
82
83 /**
84 * Options requested by peer
85 */
86 uint32_t options;
87#define OPTION_LONG_POLL 1 /* GET request wants long-poll semantics */
88
89 /**
90 * _RECV or _SEND
91 */
92 int direction;
93
94 /**
95 * For PUT requests: Is this the first or last callback with size 0
96 * For GET requests: Have we sent a message
97 */
98 int connected;
99
100 /**
101 * Currently suspended
102 */
103 bool suspended;
104};
105
106
107/**
108 * Wrapper to manage addresses
109 */
110struct HttpAddressWrapper
111{
112 /**
113 * Linked list next
114 */
115 struct HttpAddressWrapper *next;
116
117 /**
118 * Linked list previous
119 */
120 struct HttpAddressWrapper *prev;
121
122 /**
123 * An address we are using.
124 */
125 struct HttpAddress *address;
126
127 /**
128 * Length of the address.
129 */
130 size_t addrlen;
131};
132
133
134/**
135 * Message to send using http
136 */
137struct HTTP_Message
138{
139 /**
140 * next pointer for double linked list
141 */
142 struct HTTP_Message *next;
143
144 /**
145 * previous pointer for double linked list
146 */
147 struct HTTP_Message *prev;
148
149 /**
150 * buffer containing data to send
151 */
152 char *buf;
153
154 /**
155 * amount of data already sent
156 */
157 size_t pos;
158
159 /**
160 * buffer length
161 */
162 size_t size;
163
164 /**
165 * HTTP/S specific overhead
166 */
167 size_t overhead;
168
169 /**
170 * Continuation function to call once the transmission buffer
171 * has again space available. NULL if there is no
172 * continuation to call.
173 */
174 GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
175
176 /**
177 * Closure for transmit_cont.
178 */
179 void *transmit_cont_cls;
180};
181
182
183/**
184 * Session handle for connections.
185 */
186struct GNUNET_ATS_Session
187{
188 /**
189 * To whom are we talking to (set to our identity
190 * if we are still waiting for the welcome message)
191 */
192 struct GNUNET_PeerIdentity target;
193
194 /**
195 * Pointer to the global plugin struct.
196 */
197 struct HTTP_Server_Plugin *plugin;
198
199 /**
200 * next pointer for double linked list
201 */
202 struct HTTP_Message *msg_head;
203
204 /**
205 * previous pointer for double linked list
206 */
207 struct HTTP_Message *msg_tail;
208
209 /**
210 * Message stream tokenizer for incoming data
211 */
212 struct GNUNET_MessageStreamTokenizer *msg_tk;
213
214 /**
215 * Client recv handle
216 */
217 struct ServerRequest *server_recv;
218
219 /**
220 * Client send handle
221 */
222 struct ServerRequest *server_send;
223
224 /**
225 * Address
226 */
227 struct GNUNET_HELLO_Address *address;
228
229 /**
230 * Absolute time when to receive data again
231 * Used for receive throttling
232 */
233 struct GNUNET_TIME_Absolute next_receive;
234
235 /**
236 * Absolute time when this connection will time out.
237 */
238 struct GNUNET_TIME_Absolute timeout;
239
240 /**
241 * Session timeout task
242 */
243 struct GNUNET_SCHEDULER_Task *timeout_task;
244
245 /**
246 * Task to resume MHD handling when receiving is allowed again
247 */
248 struct GNUNET_SCHEDULER_Task *recv_wakeup_task;
249
250 /**
251 * Number of bytes waiting for transmission to this peer.
252 */
253 unsigned long long bytes_in_queue;
254
255 /**
256 * Number of messages waiting for transmission to this peer.
257 */
258 unsigned int msgs_in_queue;
259
260 /**
261 * Unique HTTP/S connection tag for this connection
262 */
263 uint32_t tag;
264
265 /**
266 * ATS network type.
267 */
268 enum GNUNET_NetworkType scope;
269
270 /**
271 * #GNUNET_YES if this session is known to the service.
272 */
273 int known_to_service;
274};
275
276
277/**
278 * Encapsulation of all of the state of the plugin.
279 */
280struct HTTP_Server_Plugin
281{
282 /**
283 * Our environment.
284 */
285 struct GNUNET_TRANSPORT_PluginEnvironment *env;
286
287 /**
288 * Hash map of open sessions.
289 */
290 struct GNUNET_CONTAINER_MultiPeerMap *sessions;
291
292 /**
293 * Function to call about session status changes.
294 */
295 GNUNET_TRANSPORT_SessionInfoCallback sic;
296
297 /**
298 * Closure for @e sic.
299 */
300 void *sic_cls;
301
302 /**
303 * Plugin name
304 */
305 char *name;
306
307 /**
308 * Protocol
309 */
310 char *protocol;
311
312 /**
313 * External address
314 */
315 char *external_hostname;
316
317 /**
318 * External hostname the plugin can be connected to, can be different to
319 * the host's FQDN, used e.g. for reverse proxying
320 */
321 struct GNUNET_HELLO_Address *ext_addr;
322
323 /**
324 * NAT handle & address management
325 */
326 struct GNUNET_NAT_Handle *nat;
327
328 /**
329 * IPv4 addresses DLL head
330 */
331 struct HttpAddressWrapper *addr_head;
332
333 /**
334 * IPv4 addresses DLL tail
335 */
336 struct HttpAddressWrapper *addr_tail;
337
338 /**
339 * IPv4 server socket to bind to
340 */
341 struct sockaddr_in *server_addr_v4;
342
343 /**
344 * IPv6 server socket to bind to
345 */
346 struct sockaddr_in6 *server_addr_v6;
347
348 /**
349 * MHD IPv4 daemon
350 */
351 struct MHD_Daemon *server_v4;
352
353 /**
354 * MHD IPv4 daemon
355 */
356 struct MHD_Daemon *server_v6;
357
358#if BUILD_HTTPS
359 /**
360 * Crypto related
361 *
362 * Example:
363 *
364 * Use RC4-128 instead of AES:
365 * NONE:+VERS-TLS1.0:+ARCFOUR-128:+SHA1:+RSA:+COMP-NULL
366 *
367 */
368 char *crypto_init;
369
370 /**
371 * TLS key
372 */
373 char *key;
374
375 /**
376 * TLS certificate
377 */
378 char *cert;
379#endif
380
381 /**
382 * MHD IPv4 task
383 */
384 struct GNUNET_SCHEDULER_Task *server_v4_task;
385
386 /**
387 * MHD IPv6 task
388 */
389 struct GNUNET_SCHEDULER_Task *server_v6_task;
390
391 /**
392 * Task calling transport service about external address
393 */
394 struct GNUNET_SCHEDULER_Task *notify_ext_task;
395
396 /**
397 * Notify transport only about external address
398 */
399 unsigned int external_only;
400
401 /**
402 * The IPv4 server is scheduled to run asap
403 */
404 int server_v4_immediately;
405
406 /**
407 * The IPv6 server is scheduled to run asap
408 */
409 int server_v6_immediately;
410
411 /**
412 * Verify external address
413 */
414 int verify_external_hostname;
415
416 /**
417 * Maximum number of sockets the plugin can use
418 * Each http request /request connections are two connections
419 */
420 unsigned int max_request;
421
422 /**
423 * Current number of sockets the plugin can use
424 * Each http connection are two requests
425 */
426 unsigned int cur_request;
427
428 /**
429 * Did we immediately end the session in disconnect_cb
430 */
431 int in_shutdown;
432
433 /**
434 * Length of peer id
435 */
436 int peer_id_length;
437
438 /**
439 * My options to be included in the address
440 */
441 uint32_t options;
442
443 /**
444 * use IPv6
445 */
446 uint16_t use_ipv6;
447
448 /**
449 * use IPv4
450 */
451 uint16_t use_ipv4;
452
453 /**
454 * Port used
455 */
456 uint16_t port;
457
458 /**
459 * Regex for parsing URLs. FIXME: this seems overkill.
460 */
461 regex_t url_regex;
462};
463
464
465/**
466 * If a session monitor is attached, notify it about the new
467 * session state.
468 *
469 * @param plugin our plugin
470 * @param session session that changed state
471 * @param state new state of the session
472 */
473static void
474notify_session_monitor (struct HTTP_Server_Plugin *plugin,
475 struct GNUNET_ATS_Session *session,
476 enum GNUNET_TRANSPORT_SessionState state)
477{
478 struct GNUNET_TRANSPORT_SessionInfo info;
479
480 if (NULL == plugin->sic)
481 return;
482 memset (&info, 0, sizeof(info));
483 info.state = state;
484 info.is_inbound = GNUNET_YES;
485 info.num_msg_pending = session->msgs_in_queue;
486 info.num_bytes_pending = session->bytes_in_queue;
487 info.receive_delay = session->next_receive;
488 info.session_timeout = session->timeout;
489 info.address = session->address;
490 plugin->sic (plugin->sic_cls,
491 session,
492 &info);
493}
494
495
496/**
497 * Wake up an MHD connection which was suspended
498 *
499 * @param cls the session
500 */
501static void
502server_wake_up (void *cls)
503{
504 struct GNUNET_ATS_Session *s = cls;
505
506 s->recv_wakeup_task = NULL;
507 LOG (GNUNET_ERROR_TYPE_DEBUG,
508 "Session %p: Waking up PUT handle\n",
509 s);
510 GNUNET_assert (s->server_recv->suspended);
511 MHD_resume_connection (s->server_recv->mhd_conn);
512 s->server_recv->suspended = false;
513}
514
515
516/**
517 * Reschedule the execution of both IPv4 and IPv6 server.
518 *
519 * @param plugin the plugin
520 * @param server which server to schedule v4 or v6?
521 * @param now #GNUNET_YES to schedule execution immediately, #GNUNET_NO to wait
522 * until timeout
523 */
524static void
525server_reschedule (struct HTTP_Server_Plugin *plugin,
526 struct MHD_Daemon *server,
527 int now);
528
529
530/**
531 * Deletes the session. Must not be used afterwards.
532 *
533 * @param s the session to delete
534 */
535static void
536server_delete_session (struct GNUNET_ATS_Session *s)
537{
538 struct HTTP_Server_Plugin *plugin = s->plugin;
539 struct HTTP_Message *msg;
540
541 if (NULL != s->timeout_task)
542 {
543 GNUNET_SCHEDULER_cancel (s->timeout_task);
544 s->timeout_task = NULL;
545 s->timeout = GNUNET_TIME_UNIT_ZERO_ABS;
546 }
547 if (NULL != s->recv_wakeup_task)
548 {
549 GNUNET_SCHEDULER_cancel (s->recv_wakeup_task);
550 s->recv_wakeup_task = NULL;
551 if (NULL != s->server_recv)
552 {
553 GNUNET_assert (s->server_recv->suspended);
554 s->server_recv->suspended = false;
555 MHD_resume_connection (s->server_recv->mhd_conn);
556 }
557 }
558 GNUNET_assert (GNUNET_OK ==
559 GNUNET_CONTAINER_multipeermap_remove (plugin->sessions,
560 &s->target,
561 s));
562 while (NULL != (msg = s->msg_head))
563 {
564 GNUNET_CONTAINER_DLL_remove (s->msg_head,
565 s->msg_tail,
566 msg);
567 if (NULL != msg->transmit_cont)
568 msg->transmit_cont (msg->transmit_cont_cls,
569 &s->target,
570 GNUNET_SYSERR,
571 msg->size,
572 msg->pos + msg->overhead);
573 GNUNET_assert (s->msgs_in_queue > 0);
574 s->msgs_in_queue--;
575 GNUNET_assert (s->bytes_in_queue >= msg->size);
576 s->bytes_in_queue -= msg->size;
577 GNUNET_free (msg);
578 }
579
580 GNUNET_assert (0 == s->msgs_in_queue);
581 GNUNET_assert (0 == s->bytes_in_queue);
582
583 if (NULL != s->server_send)
584 {
585 LOG (GNUNET_ERROR_TYPE_DEBUG,
586 "Server: %p / %p Terminating inbound PUT session to peer `%s'\n",
587 s, s->server_send,
588 GNUNET_i2s (&s->target));
589 s->server_send->session = NULL;
590 MHD_set_connection_option (s->server_send->mhd_conn,
591 MHD_CONNECTION_OPTION_TIMEOUT,
592 1 /* 0 = no timeout, so this is MIN */);
593 if (s->server_send->suspended)
594 {
595 s->server_send->suspended = false;
596 MHD_resume_connection (s->server_send->mhd_conn);
597 }
598 server_reschedule (plugin,
599 s->server_send->mhd_daemon,
600 GNUNET_YES);
601 }
602
603 if (NULL != s->server_recv)
604 {
605 LOG (GNUNET_ERROR_TYPE_DEBUG,
606 "Server: %p / %p Terminating inbound GET session to peer `%s'\n",
607 s, s->server_recv, GNUNET_i2s (&s->target));
608 s->server_recv->session = NULL;
609 MHD_set_connection_option (s->server_recv->mhd_conn,
610 MHD_CONNECTION_OPTION_TIMEOUT,
611 1 /* 0 = no timeout, so this is MIN */);
612 server_reschedule (plugin,
613 s->server_recv->mhd_daemon,
614 GNUNET_YES);
615 }
616 notify_session_monitor (plugin,
617 s,
618 GNUNET_TRANSPORT_SS_DONE);
619 if (GNUNET_YES == s->known_to_service)
620 {
621 plugin->env->session_end (plugin->env->cls,
622 s->address,
623 s);
624 s->known_to_service = GNUNET_NO;
625 }
626 if (NULL != s->msg_tk)
627 {
628 GNUNET_MST_destroy (s->msg_tk);
629 s->msg_tk = NULL;
630 }
631 GNUNET_HELLO_address_free (s->address);
632 LOG (GNUNET_ERROR_TYPE_DEBUG,
633 "Session %p destroyed\n",
634 s);
635 GNUNET_free (s);
636}
637
638
639/**
640 * Disconnect session @a s by telling MHD to close the
641 * connections (reducing timeout, etc.).
642 *
643 * @param cls closure with the `struct HTTP_Server_Plugin`
644 * @param s the session
645 * @return #GNUNET_OK on success
646 */
647static int
648http_server_plugin_disconnect_session (void *cls,
649 struct GNUNET_ATS_Session *s)
650{
651 server_delete_session (s);
652 return GNUNET_OK;
653}
654
655
656/**
657 * Session was idle, so disconnect it
658 *
659 * @param cls the session
660 */
661static void
662server_session_timeout (void *cls)
663{
664 struct GNUNET_ATS_Session *s = cls;
665 struct GNUNET_TIME_Relative left;
666
667 s->timeout_task = NULL;
668 left = GNUNET_TIME_absolute_get_remaining (s->timeout);
669 if (0 != left.rel_value_us)
670 {
671 /* not actually our turn yet, but let's at least update
672 the monitor, it may think we're about to die ... */
673 notify_session_monitor (s->plugin,
674 s,
675 GNUNET_TRANSPORT_SS_UP);
676 s->timeout_task = GNUNET_SCHEDULER_add_delayed (left,
677 &server_session_timeout,
678 s);
679 return;
680 }
681 GNUNET_log (TIMEOUT_LOG,
682 "Session %p was idle for %s, disconnecting\n",
683 s,
684 GNUNET_STRINGS_relative_time_to_string (
685 HTTP_SERVER_SESSION_TIMEOUT,
686 GNUNET_YES));
687 server_delete_session (s);
688}
689
690
691/**
692 * Increment session timeout due to activity session @a s
693 *
694 * @param s the session
695 */
696static void
697server_reschedule_session_timeout (struct GNUNET_ATS_Session *s)
698{
699 GNUNET_assert (NULL != s->timeout_task);
700 s->timeout = GNUNET_TIME_relative_to_absolute (
701 GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
702}
703
704
705/**
706 * Function that can be used by the transport service to transmit
707 * a message using the plugin. Note that in the case of a
708 * peer disconnecting, the continuation MUST be called
709 * prior to the disconnect notification itself. This function
710 * will be called with this peer's HELLO message to initiate
711 * a fresh connection to another peer.
712 *
713 * @param cls closure
714 * @param session which session must be used
715 * @param msgbuf the message to transmit
716 * @param msgbuf_size number of bytes in @a msgbuf
717 * @param priority how important is the message (most plugins will
718 * ignore message priority and just FIFO)
719 * @param to how long to wait at most for the transmission (does not
720 * require plugins to discard the message after the timeout,
721 * just advisory for the desired delay; most plugins will ignore
722 * this as well)
723 * @param cont continuation to call once the message has
724 * been transmitted (or if the transport is ready
725 * for the next transmission call; or if the
726 * peer disconnected...); can be NULL
727 * @param cont_cls closure for @a cont
728 * @return number of bytes used (on the physical network, with overheads);
729 * -1 on hard errors (i.e. address invalid); 0 is a legal value
730 * and does NOT mean that the message was not transmitted (DV)
731 */
732static ssize_t
733http_server_plugin_send (void *cls,
734 struct GNUNET_ATS_Session *session,
735 const char *msgbuf,
736 size_t msgbuf_size,
737 unsigned int priority,
738 struct GNUNET_TIME_Relative to,
739 GNUNET_TRANSPORT_TransmitContinuation cont,
740 void *cont_cls)
741{
742 struct HTTP_Server_Plugin *plugin = cls;
743 struct HTTP_Message *msg;
744 ssize_t bytes_sent = 0;
745 char *stat_txt;
746
747 LOG (GNUNET_ERROR_TYPE_DEBUG,
748 "Session %p/request %p: Sending message with %lu to peer `%s'\n",
749 session,
750 session->server_send,
751 (unsigned long) msgbuf_size,
752 GNUNET_i2s (&session->target));
753
754 /* create new message and schedule */
755 bytes_sent = sizeof(struct HTTP_Message) + msgbuf_size;
756 msg = GNUNET_malloc (bytes_sent);
757 msg->next = NULL;
758 msg->size = msgbuf_size;
759 msg->pos = 0;
760 msg->buf = (char *) &msg[1];
761 msg->transmit_cont = cont;
762 msg->transmit_cont_cls = cont_cls;
763 GNUNET_memcpy (msg->buf,
764 msgbuf,
765 msgbuf_size);
766 GNUNET_CONTAINER_DLL_insert_tail (session->msg_head,
767 session->msg_tail,
768 msg);
769 session->msgs_in_queue++;
770 session->bytes_in_queue += msg->size;
771 notify_session_monitor (plugin,
772 session,
773 GNUNET_TRANSPORT_SS_UP);
774 GNUNET_asprintf (&stat_txt,
775 "# bytes currently in %s_server buffers",
776 plugin->protocol);
777 GNUNET_STATISTICS_update (plugin->env->stats,
778 stat_txt, msgbuf_size, GNUNET_NO);
779 GNUNET_free (stat_txt);
780
781 if (NULL != session->server_send)
782 {
783 if (session->server_send->suspended)
784 {
785 MHD_resume_connection (session->server_send->mhd_conn);
786 session->server_send->suspended = false;
787 }
788 server_reschedule (session->plugin,
789 session->server_send->mhd_daemon,
790 GNUNET_YES);
791 }
792 return bytes_sent;
793}
794
795
796/**
797 * Terminate session during shutdown.
798 *
799 * @param cls the `struct HTTP_Server_Plugin *`
800 * @param peer for which this is a session
801 * @param value the `struct GNUNET_ATS_Session` to clean up
802 * @return #GNUNET_OK (continue to iterate)
803 */
804static int
805destroy_session_shutdown_cb (void *cls,
806 const struct GNUNET_PeerIdentity *peer,
807 void *value)
808{
809 struct GNUNET_ATS_Session *s = value;
810 struct ServerRequest *sc_send;
811 struct ServerRequest *sc_recv;
812
813 sc_send = s->server_send;
814 sc_recv = s->server_recv;
815 server_delete_session (s);
816 if (NULL != sc_send)
817 sc_send->session = NULL;
818 if (NULL != sc_recv)
819 sc_recv->session = NULL;
820
821 return GNUNET_OK;
822}
823
824
825/**
826 * Terminate session.
827 *
828 * @param cls the `struct HTTP_Server_Plugin *`
829 * @param peer for which this is a session
830 * @param value the `struct GNUNET_ATS_Session` to clean up
831 * @return #GNUNET_OK (continue to iterate)
832 */
833static int
834destroy_session_cb (void *cls,
835 const struct GNUNET_PeerIdentity *peer,
836 void *value)
837{
838 struct GNUNET_ATS_Session *s = value;
839
840 server_delete_session (s);
841 return GNUNET_OK;
842}
843
844
845/**
846 * Function that can be used to force the plugin to disconnect
847 * from the given peer and cancel all previous transmissions
848 * (and their continuationc).
849 *
850 * @param cls closure
851 * @param target peer from which to disconnect
852 */
853static void
854http_server_plugin_disconnect_peer (void *cls,
855 const struct GNUNET_PeerIdentity *target)
856{
857 struct HTTP_Server_Plugin *plugin = cls;
858
859 LOG (GNUNET_ERROR_TYPE_DEBUG,
860 "Transport tells me to disconnect `%s'\n",
861 GNUNET_i2s (target));
862 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessions,
863 target,
864 &destroy_session_cb,
865 plugin);
866}
867
868
869/**
870 * Another peer has suggested an address for this
871 * peer and transport plugin. Check that this could be a valid
872 * address. If so, consider adding it to the list
873 * of addresses.
874 *
875 * @param cls closure
876 * @param addr pointer to the address
877 * @param addrlen length of @a addr
878 * @return #GNUNET_OK if this is a plausible address for this peer
879 * and transport
880 */
881static int
882http_server_plugin_address_suggested (void *cls,
883 const void *addr,
884 size_t addrlen)
885{
886 struct HTTP_Server_Plugin *plugin = cls;
887 struct HttpAddressWrapper *next;
888 struct HttpAddressWrapper *pos;
889 const struct HttpAddress *haddr = addr;
890
891 if ((NULL != plugin->ext_addr) &&
892 (GNUNET_YES == (http_common_cmp_addresses (addr, addrlen,
893 plugin->ext_addr->address,
894 plugin->ext_addr->
895 address_length))) )
896 {
897 /* Checking HTTP_OPTIONS_VERIFY_CERTIFICATE option for external hostname */
898 if ((ntohl (haddr->options) & HTTP_OPTIONS_VERIFY_CERTIFICATE) !=
899 (plugin->options & HTTP_OPTIONS_VERIFY_CERTIFICATE))
900 return GNUNET_NO; /* VERIFY option not set as required! */
901 return GNUNET_OK;
902 }
903 next = plugin->addr_head;
904 while (NULL != (pos = next))
905 {
906 next = pos->next;
907 if (GNUNET_YES == (http_common_cmp_addresses (addr,
908 addrlen,
909 pos->address,
910 pos->addrlen)))
911 return GNUNET_OK;
912 }
913 return GNUNET_NO;
914}
915
916
917/**
918 * Creates a new outbound session the transport
919 * service will use to send data to the peer.
920 *
921 * Since HTTP/S server cannot create sessions, always returns NULL.
922 *
923 * @param cls the plugin
924 * @param address the address
925 * @return always NULL
926 */
927static struct GNUNET_ATS_Session *
928http_server_plugin_get_session (void *cls,
929 const struct GNUNET_HELLO_Address *address)
930{
931 return NULL;
932}
933
934
935/**
936 * Call MHD IPv4 to process pending requests and then go back
937 * and schedule the next run.
938 *
939 * @param cls plugin as closure
940 */
941static void
942server_v4_run (void *cls)
943{
944 struct HTTP_Server_Plugin *plugin = cls;
945
946 plugin->server_v4_task = NULL;
947 plugin->server_v4_immediately = GNUNET_NO;
948 GNUNET_assert (MHD_YES == MHD_run (plugin->server_v4));
949 server_reschedule (plugin, plugin->server_v4, GNUNET_NO);
950}
951
952
953/**
954 * Call MHD IPv6 to process pending requests and then go back
955 * and schedule the next run.
956 *
957 * @param cls plugin as closure
958 */
959static void
960server_v6_run (void *cls)
961{
962 struct HTTP_Server_Plugin *plugin = cls;
963
964 plugin->server_v6_task = NULL;
965 plugin->server_v6_immediately = GNUNET_NO;
966 GNUNET_assert (MHD_YES == MHD_run (plugin->server_v6));
967 server_reschedule (plugin, plugin->server_v6, GNUNET_NO);
968}
969
970
971/**
972 * Function that queries MHD's select sets and
973 * starts the task waiting for them.
974 *
975 * @param plugin plugin
976 * @param daemon_handle the MHD daemon handle
977 * @param now schedule now
978 * @return gnunet task identifier
979 */
980static struct GNUNET_SCHEDULER_Task *
981server_schedule (struct HTTP_Server_Plugin *plugin,
982 struct MHD_Daemon *daemon_handle,
983 int now)
984{
985 struct GNUNET_SCHEDULER_Task *ret;
986 fd_set rs;
987 fd_set ws;
988 fd_set es;
989 struct GNUNET_NETWORK_FDSet *wrs;
990 struct GNUNET_NETWORK_FDSet *wws;
991 int max;
992 MHD_UNSIGNED_LONG_LONG timeout;
993 static unsigned long long last_timeout = 0;
994 int haveto;
995 struct GNUNET_TIME_Relative tv;
996
997 if (GNUNET_YES == plugin->in_shutdown)
998 return NULL;
999
1000 ret = NULL;
1001 FD_ZERO (&rs);
1002 FD_ZERO (&ws);
1003 FD_ZERO (&es);
1004 wrs = GNUNET_NETWORK_fdset_create ();
1005 wws = GNUNET_NETWORK_fdset_create ();
1006 max = -1;
1007 GNUNET_assert (MHD_YES ==
1008 MHD_get_fdset (daemon_handle,
1009 &rs,
1010 &ws,
1011 &es,
1012 &max));
1013 haveto = MHD_get_timeout (daemon_handle, &timeout);
1014 if (haveto == MHD_YES)
1015 {
1016 if (timeout != last_timeout)
1017 {
1018 LOG (GNUNET_ERROR_TYPE_DEBUG,
1019 "SELECT Timeout changed from %llu to %llu (ms)\n",
1020 last_timeout, timeout);
1021 last_timeout = timeout;
1022 }
1023 if (timeout <= GNUNET_TIME_UNIT_SECONDS.rel_value_us / 1000LL)
1024 tv.rel_value_us = (uint64_t) timeout * 1000LL;
1025 else
1026 tv = GNUNET_TIME_UNIT_SECONDS;
1027 }
1028 else
1029 tv = GNUNET_TIME_UNIT_SECONDS;
1030 /* Force immediate run, since we have outbound data to send */
1031 if (now == GNUNET_YES)
1032 tv = GNUNET_TIME_UNIT_MILLISECONDS;
1033 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max + 1);
1034 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max + 1);
1035
1036 if (daemon_handle == plugin->server_v4)
1037 {
1038 if (plugin->server_v4_task != NULL)
1039 {
1040 GNUNET_SCHEDULER_cancel (plugin->server_v4_task);
1041 plugin->server_v4_task = NULL;
1042 }
1043#if 0
1044 LOG (GNUNET_ERROR_TYPE_DEBUG,
1045 "Scheduling IPv4 server task in %llu ms\n",
1046 tv);
1047#endif
1048 ret =
1049 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1050 tv, wrs, wws,
1051 &server_v4_run, plugin);
1052 }
1053 if (daemon_handle == plugin->server_v6)
1054 {
1055 if (plugin->server_v6_task != NULL)
1056 {
1057 GNUNET_SCHEDULER_cancel (plugin->server_v6_task);
1058 plugin->server_v6_task = NULL;
1059 }
1060#if 0
1061 LOG (GNUNET_ERROR_TYPE_DEBUG,
1062 "Scheduling IPv6 server task in %llu ms\n", tv);
1063#endif
1064 ret =
1065 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1066 tv, wrs, wws,
1067 &server_v6_run, plugin);
1068 }
1069 GNUNET_NETWORK_fdset_destroy (wrs);
1070 GNUNET_NETWORK_fdset_destroy (wws);
1071 return ret;
1072}
1073
1074
1075/**
1076 * Reschedule the execution of both IPv4 and IPv6 server
1077 *
1078 * @param plugin the plugin
1079 * @param server which server to schedule v4 or v6?
1080 * @param now #GNUNET_YES to schedule execution immediately, #GNUNET_NO to wait
1081 * until timeout
1082 */
1083static void
1084server_reschedule (struct HTTP_Server_Plugin *plugin,
1085 struct MHD_Daemon *server,
1086 int now)
1087{
1088 if ((server == plugin->server_v4) && (plugin->server_v4 != NULL))
1089 {
1090 if (GNUNET_YES == plugin->server_v4_immediately)
1091 return; /* No rescheduling, server will run asap */
1092
1093 if (GNUNET_YES == now)
1094 plugin->server_v4_immediately = GNUNET_YES;
1095
1096 if (plugin->server_v4_task != NULL)
1097 {
1098 GNUNET_SCHEDULER_cancel (plugin->server_v4_task);
1099 plugin->server_v4_task = NULL;
1100 }
1101 plugin->server_v4_task = server_schedule (plugin, plugin->server_v4, now);
1102 }
1103
1104 if ((server == plugin->server_v6) && (plugin->server_v6 != NULL))
1105 {
1106 if (GNUNET_YES == plugin->server_v6_immediately)
1107 return; /* No rescheduling, server will run asap */
1108
1109 if (GNUNET_YES == now)
1110 plugin->server_v6_immediately = GNUNET_YES;
1111
1112 if (plugin->server_v6_task != NULL)
1113 {
1114 GNUNET_SCHEDULER_cancel (plugin->server_v6_task);
1115 plugin->server_v6_task = NULL;
1116 }
1117 plugin->server_v6_task = server_schedule (plugin, plugin->server_v6, now);
1118 }
1119}
1120
1121
1122/**
1123 * Function that is called to get the keepalive factor.
1124 * GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to
1125 * calculate the interval between keepalive packets.
1126 *
1127 * @param cls closure with the `struct HTTP_Server_Plugin`
1128 * @return keepalive factor
1129 */
1130static unsigned int
1131http_server_query_keepalive_factor (void *cls)
1132{
1133 return 3;
1134}
1135
1136
1137/**
1138 * Function that will be called whenever the transport service wants to
1139 * notify the plugin that a session is still active and in use and
1140 * therefore the session timeout for this session has to be updated
1141 *
1142 * @param cls closure
1143 * @param peer which peer was the session for
1144 * @param session which session is being updated
1145 */
1146static void
1147http_server_plugin_update_session_timeout (void *cls,
1148 const struct
1149 GNUNET_PeerIdentity *peer,
1150 struct GNUNET_ATS_Session *session)
1151{
1152 server_reschedule_session_timeout (session);
1153}
1154
1155
1156/**
1157 * Tell MHD that the connection should timeout after @a to seconds.
1158 *
1159 * @param plugin our plugin
1160 * @param s session for which the timeout changes
1161 * @param to timeout in seconds
1162 */
1163static void
1164server_mhd_connection_timeout (struct HTTP_Server_Plugin *plugin,
1165 struct GNUNET_ATS_Session *s,
1166 unsigned int to)
1167{
1168 /* Setting timeouts for other connections */
1169 if (NULL != s->server_recv)
1170 {
1171 LOG (GNUNET_ERROR_TYPE_DEBUG,
1172 "Setting timeout for %p to %u sec.\n",
1173 s->server_recv, to);
1174 MHD_set_connection_option (s->server_recv->mhd_conn,
1175 MHD_CONNECTION_OPTION_TIMEOUT,
1176 to);
1177 server_reschedule (plugin, s->server_recv->mhd_daemon, GNUNET_NO);
1178 }
1179 if (NULL != s->server_send)
1180 {
1181 LOG (GNUNET_ERROR_TYPE_DEBUG,
1182 "Setting timeout for %p to %u sec.\n",
1183 s->server_send, to);
1184 MHD_set_connection_option (s->server_send->mhd_conn,
1185 MHD_CONNECTION_OPTION_TIMEOUT,
1186 to);
1187 server_reschedule (plugin, s->server_send->mhd_daemon, GNUNET_NO);
1188 }
1189}
1190
1191
1192/**
1193 * Parse incoming URL for tag and target
1194 *
1195 * @param plugin plugin
1196 * @param url incoming url
1197 * @param target where to store the target
1198 * @param tag where to store the tag
1199 * @param options where to store the options
1200 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
1201 */
1202static int
1203server_parse_url (struct HTTP_Server_Plugin *plugin,
1204 const char *url,
1205 struct GNUNET_PeerIdentity *target,
1206 uint32_t *tag,
1207 uint32_t *options)
1208{
1209 regmatch_t matches[4];
1210 const char *tag_start;
1211 const char *target_start;
1212 char *tag_end;
1213 char *options_end;
1214 size_t hash_length;
1215 unsigned long int rc;
1216
1217 /* URL parsing */
1218#define URL_REGEX \
1219 ("^.*/([0-9A-Z]+);([0-9]+)(,[0-9]+)?$")
1220
1221 if (NULL == url)
1222 {
1223 GNUNET_break (0);
1224 return GNUNET_SYSERR;
1225 }
1226
1227 if (regexec (&plugin->url_regex, url, 4, matches, 0))
1228 {
1229 LOG (GNUNET_ERROR_TYPE_DEBUG,
1230 "URL `%s' did not match regex\n", url);
1231 return GNUNET_SYSERR;
1232 }
1233
1234 target_start = &url[matches[1].rm_so];
1235 tag_start = &url[matches[2].rm_so];
1236
1237 /* convert tag */
1238 rc = strtoul (tag_start, &tag_end, 10);
1239 if (&url[matches[2].rm_eo] != tag_end)
1240 {
1241 LOG (GNUNET_ERROR_TYPE_DEBUG,
1242 "URL tag did not line up with submatch\n");
1243 return GNUNET_SYSERR;
1244 }
1245 if (rc == 0)
1246 {
1247 LOG (GNUNET_ERROR_TYPE_DEBUG,
1248 "URL tag is zero\n");
1249 return GNUNET_SYSERR;
1250 }
1251 if ((rc == ULONG_MAX) && (ERANGE == errno))
1252 {
1253 LOG (GNUNET_ERROR_TYPE_DEBUG,
1254 "URL tag > ULONG_MAX\n");
1255 return GNUNET_SYSERR;
1256 }
1257 if (rc > UINT32_MAX)
1258 {
1259 LOG (GNUNET_ERROR_TYPE_DEBUG,
1260 "URL tag > UINT32_MAX\n");
1261 return GNUNET_SYSERR;
1262 }
1263 (*tag) = (uint32_t) rc;
1264 LOG (GNUNET_ERROR_TYPE_DEBUG,
1265 "Found tag `%u' in url\n",
1266 *tag);
1267
1268 /* convert peer id */
1269 hash_length = matches[1].rm_eo - matches[1].rm_so;
1270 if (hash_length != plugin->peer_id_length)
1271 {
1272 LOG (GNUNET_ERROR_TYPE_DEBUG,
1273 "URL target is %lu bytes, expecting %u\n",
1274 (unsigned long) hash_length, plugin->peer_id_length);
1275 return GNUNET_SYSERR;
1276 }
1277 if (GNUNET_OK !=
1278 GNUNET_CRYPTO_eddsa_public_key_from_string (target_start,
1279 hash_length,
1280 &target->public_key))
1281 {
1282 LOG (GNUNET_ERROR_TYPE_DEBUG,
1283 "URL target conversion failed\n");
1284 return GNUNET_SYSERR;
1285 }
1286 LOG (GNUNET_ERROR_TYPE_DEBUG,
1287 "Found target `%s' in URL\n",
1288 GNUNET_i2s_full (target));
1289
1290 /* convert options */
1291 if (-1 == matches[3].rm_so)
1292 {
1293 *options = 0;
1294 }
1295 else
1296 {
1297 rc = strtoul (&url[matches[3].rm_so + 1], &options_end, 10);
1298 if (&url[matches[3].rm_eo] != options_end)
1299 {
1300 LOG (GNUNET_ERROR_TYPE_DEBUG,
1301 "URL options did not line up with submatch\n");
1302 return GNUNET_SYSERR;
1303 }
1304 if ((rc == ULONG_MAX) && (ERANGE == errno))
1305 {
1306 LOG (GNUNET_ERROR_TYPE_DEBUG,
1307 "URL options > ULONG_MAX\n");
1308 return GNUNET_SYSERR;
1309 }
1310 if (rc > UINT32_MAX)
1311 {
1312 LOG (GNUNET_ERROR_TYPE_DEBUG,
1313 "URL options > UINT32_MAX\n");
1314 return GNUNET_SYSERR;
1315 }
1316 (*options) = (uint32_t) rc;
1317 LOG (GNUNET_ERROR_TYPE_DEBUG,
1318 "Found options `%u' in url\n",
1319 *options);
1320 }
1321 return GNUNET_OK;
1322}
1323
1324
1325/**
1326 * Closure for #session_tag_it().
1327 */
1328struct GNUNET_ATS_SessionTagContext
1329{
1330 /**
1331 * Set to session matching the tag.
1332 */
1333 struct GNUNET_ATS_Session *res;
1334
1335 /**
1336 * Tag we are looking for.
1337 */
1338 uint32_t tag;
1339};
1340
1341
1342/**
1343 * Find a session with a matching tag.
1344 *
1345 * @param cls the `struct GNUNET_ATS_SessionTagContext *`
1346 * @param key peer identity (unused)
1347 * @param value the `struct GNUNET_ATS_Session *`
1348 * @return #GNUNET_NO if we found the session, #GNUNET_OK if not
1349 */
1350static int
1351session_tag_it (void *cls,
1352 const struct GNUNET_PeerIdentity *key,
1353 void *value)
1354{
1355 struct GNUNET_ATS_SessionTagContext *stc = cls;
1356 struct GNUNET_ATS_Session *s = value;
1357
1358 if (s->tag == stc->tag)
1359 {
1360 stc->res = s;
1361 return GNUNET_NO;
1362 }
1363 return GNUNET_YES;
1364}
1365
1366
1367/**
1368 * Lookup a mhd connection and create one if none is found
1369 *
1370 * @param plugin the plugin handle
1371 * @param mhd_connection the incoming mhd_connection
1372 * @param url incoming requested URL
1373 * @param method PUT or GET
1374 * @return the server connecetion
1375 */
1376static struct ServerRequest *
1377server_lookup_connection (struct HTTP_Server_Plugin *plugin,
1378 struct MHD_Connection *mhd_connection,
1379 const char *url,
1380 const char *method)
1381{
1382 struct GNUNET_ATS_Session *s = NULL;
1383 struct ServerRequest *sc = NULL;
1384 const union MHD_ConnectionInfo *conn_info;
1385 struct HttpAddress *addr;
1386 struct GNUNET_PeerIdentity target;
1387 size_t addr_len;
1388 struct GNUNET_ATS_SessionTagContext stc;
1389 uint32_t options;
1390 int direction = GNUNET_SYSERR;
1391 unsigned int to;
1392 enum GNUNET_NetworkType scope;
1393
1394 conn_info = MHD_get_connection_info (mhd_connection,
1395 MHD_CONNECTION_INFO_CLIENT_ADDRESS);
1396 if ((conn_info->client_addr->sa_family != AF_INET) &&
1397 (conn_info->client_addr->sa_family != AF_INET6))
1398 return NULL;
1399 LOG (GNUNET_ERROR_TYPE_DEBUG,
1400 "New %s request from %s\n",
1401 method,
1402 url);
1403 stc.tag = 0;
1404 options = 0; /* make gcc happy */
1405 if (GNUNET_SYSERR ==
1406 server_parse_url (plugin, url, &target, &stc.tag, &options))
1407 {
1408 LOG (GNUNET_ERROR_TYPE_DEBUG,
1409 "Invalid url %s\n", url);
1410 return NULL;
1411 }
1412 if (0 == strcmp (MHD_HTTP_METHOD_PUT, method))
1413 direction = _RECEIVE;
1414 else if (0 == strcmp (MHD_HTTP_METHOD_GET, method))
1415 direction = _SEND;
1416 else
1417 {
1418 LOG (GNUNET_ERROR_TYPE_DEBUG,
1419 "Invalid method %s for request from %s\n",
1420 method, url);
1421 return NULL;
1422 }
1423
1424 plugin->cur_request++;
1425 LOG (GNUNET_ERROR_TYPE_DEBUG,
1426 "New %s request from %s with tag %u (%u of %u)\n",
1427 method,
1428 GNUNET_i2s (&target),
1429 stc.tag,
1430 plugin->cur_request, plugin->max_request);
1431 /* find existing session */
1432 stc.res = NULL;
1433 GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessions,
1434 &target,
1435 &session_tag_it,
1436 &stc);
1437 if (NULL == (s = stc.res))
1438 {
1439 /* create new session */
1440 addr = NULL;
1441 switch (conn_info->client_addr->sa_family)
1442 {
1443 case (AF_INET):
1444 addr = http_common_address_from_socket (plugin->protocol,
1445 conn_info->client_addr,
1446 sizeof(struct sockaddr_in));
1447 addr_len = http_common_address_get_size (addr);
1448 scope = plugin->env->get_address_type (plugin->env->cls,
1449 conn_info->client_addr,
1450 sizeof(struct sockaddr_in));
1451 break;
1452
1453 case (AF_INET6):
1454 addr = http_common_address_from_socket (plugin->protocol,
1455 conn_info->client_addr,
1456 sizeof(struct sockaddr_in6));
1457 addr_len = http_common_address_get_size (addr);
1458 scope = plugin->env->get_address_type (plugin->env->cls,
1459 conn_info->client_addr,
1460 sizeof(struct sockaddr_in6));
1461 break;
1462
1463 default:
1464 /* external host name */
1465 return NULL;
1466 }
1467 s = GNUNET_new (struct GNUNET_ATS_Session);
1468 s->target = target;
1469 s->plugin = plugin;
1470 s->scope = scope;
1471 s->address = GNUNET_HELLO_address_allocate (&s->target,
1472 PLUGIN_NAME,
1473 addr,
1474 addr_len,
1475 GNUNET_HELLO_ADDRESS_INFO_INBOUND);
1476 s->next_receive = GNUNET_TIME_UNIT_ZERO_ABS;
1477 s->tag = stc.tag;
1478 s->timeout = GNUNET_TIME_relative_to_absolute (HTTP_SERVER_SESSION_TIMEOUT);
1479 s->timeout_task = GNUNET_SCHEDULER_add_delayed (HTTP_SERVER_SESSION_TIMEOUT,
1480 &server_session_timeout,
1481 s);
1482 (void) GNUNET_CONTAINER_multipeermap_put (plugin->sessions,
1483 &s->target,
1484 s,
1485 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
1486 notify_session_monitor (plugin,
1487 s,
1488 GNUNET_TRANSPORT_SS_INIT);
1489 notify_session_monitor (plugin,
1490 s,
1491 GNUNET_TRANSPORT_SS_HANDSHAKE);
1492 LOG (GNUNET_ERROR_TYPE_DEBUG,
1493 "Creating new session %p for peer `%s' connecting from `%s'\n",
1494 s, GNUNET_i2s (&target),
1495 http_common_plugin_address_to_string (plugin->protocol,
1496 addr,
1497 addr_len));
1498 GNUNET_free (addr);
1499 }
1500
1501 if ((_RECEIVE == direction) &&
1502 (NULL != s->server_recv))
1503 {
1504 LOG (GNUNET_ERROR_TYPE_DEBUG,
1505 "Duplicate PUT request from `%s' tag %u, dismissing new request\n",
1506 GNUNET_i2s (&target),
1507 stc.tag);
1508 return NULL;
1509 }
1510 if ((_SEND == direction) && (NULL != s->server_send))
1511 {
1512 LOG (GNUNET_ERROR_TYPE_DEBUG,
1513 "Duplicate GET request from `%s' tag %u, dismissing new request\n",
1514 GNUNET_i2s (&target),
1515 stc.tag);
1516 return NULL;
1517 }
1518 sc = GNUNET_new (struct ServerRequest);
1519 if (conn_info->client_addr->sa_family == AF_INET)
1520 sc->mhd_daemon = plugin->server_v4;
1521 if (conn_info->client_addr->sa_family == AF_INET6)
1522 sc->mhd_daemon = plugin->server_v6;
1523 sc->mhd_conn = mhd_connection;
1524 sc->direction = direction;
1525 sc->connected = GNUNET_NO;
1526 sc->session = s;
1527 sc->options = options;
1528 if (direction == _SEND)
1529 {
1530 s->server_send = sc;
1531 }
1532 if (direction == _RECEIVE)
1533 {
1534 s->server_recv = sc;
1535 }
1536
1537 if ((GNUNET_NO == s->known_to_service) &&
1538 (NULL != s->server_send) &&
1539 (NULL != s->server_recv))
1540 {
1541 s->known_to_service = GNUNET_YES;
1542 notify_session_monitor (plugin,
1543 s,
1544 GNUNET_TRANSPORT_SS_UP);
1545 plugin->env->session_start (plugin->env->cls,
1546 s->address,
1547 s,
1548 s->scope);
1549 }
1550
1551 to = (HTTP_SERVER_SESSION_TIMEOUT.rel_value_us / 1000LL / 1000LL);
1552 server_mhd_connection_timeout (plugin, s, to);
1553 return sc;
1554}
1555
1556
1557/**
1558 * Callback called by MHD when it needs data to send
1559 *
1560 * @param cls current session
1561 * @param pos position in buffer
1562 * @param buf the buffer to write data to
1563 * @param max max number of bytes available in @a buf
1564 * @return bytes written to @a buf
1565 */
1566static ssize_t
1567server_send_callback (void *cls,
1568 uint64_t pos,
1569 char *buf,
1570 size_t max)
1571{
1572 struct ServerRequest *sc = cls;
1573 struct GNUNET_ATS_Session *s = sc->session;
1574 ssize_t bytes_read = 0;
1575 struct HTTP_Message *msg;
1576 char *stat_txt;
1577
1578 if (NULL == s)
1579 {
1580 /* session is disconnecting */
1581 return 0;
1582 }
1583
1584 sc = s->server_send;
1585 if (NULL == sc)
1586 return 0;
1587 msg = s->msg_head;
1588 if (NULL != msg)
1589 {
1590 /* sending */
1591 bytes_read = GNUNET_MIN (msg->size - msg->pos,
1592 max);
1593 GNUNET_memcpy (buf, &msg->buf[msg->pos], bytes_read);
1594 msg->pos += bytes_read;
1595
1596 /* removing message */
1597 if (msg->pos == msg->size)
1598 {
1599 GNUNET_CONTAINER_DLL_remove (s->msg_head,
1600 s->msg_tail,
1601 msg);
1602 if (NULL != msg->transmit_cont)
1603 msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_OK,
1604 msg->size, msg->size + msg->overhead);
1605 GNUNET_assert (s->msgs_in_queue > 0);
1606 s->msgs_in_queue--;
1607 GNUNET_assert (s->bytes_in_queue >= msg->size);
1608 s->bytes_in_queue -= msg->size;
1609 GNUNET_free (msg);
1610 notify_session_monitor (s->plugin,
1611 s,
1612 GNUNET_TRANSPORT_SS_UPDATE);
1613 }
1614 }
1615 if (0 < bytes_read)
1616 {
1617 sc->connected = GNUNET_YES;
1618 LOG (GNUNET_ERROR_TYPE_DEBUG,
1619 "Sent %lu bytes to peer `%s' with session %p \n",
1620 (unsigned long) bytes_read,
1621 GNUNET_i2s (&s->target),
1622 s);
1623 GNUNET_asprintf (&stat_txt,
1624 "# bytes currently in %s_server buffers",
1625 s->plugin->protocol);
1626 GNUNET_STATISTICS_update (s->plugin->env->stats,
1627 stat_txt,
1628 -bytes_read,
1629 GNUNET_NO);
1630 GNUNET_free (stat_txt);
1631 GNUNET_asprintf (&stat_txt,
1632 "# bytes transmitted via %s_server",
1633 s->plugin->protocol);
1634 GNUNET_STATISTICS_update (s->plugin->env->stats,
1635 stat_txt, bytes_read, GNUNET_NO);
1636 GNUNET_free (stat_txt);
1637 }
1638 else if ((sc->options & OPTION_LONG_POLL) && sc->connected)
1639 {
1640 LOG (GNUNET_ERROR_TYPE_DEBUG,
1641 "Completing GET response to peer `%s' with session %p\n",
1642 GNUNET_i2s (&s->target),
1643 s);
1644 return MHD_CONTENT_READER_END_OF_STREAM;
1645 }
1646 else
1647 {
1648 MHD_suspend_connection (s->server_send->mhd_conn);
1649 s->server_send->suspended = true;
1650 return 0;
1651 }
1652 return bytes_read;
1653}
1654
1655
1656/**
1657 * Callback called by MessageStreamTokenizer when a message has arrived
1658 *
1659 * @param cls current session as closure
1660 * @param message the message to be forwarded to transport service
1661 * @return #GNUNET_OK (all OK)
1662 */
1663static int
1664server_receive_mst_cb (void *cls,
1665 const struct GNUNET_MessageHeader *message)
1666{
1667 struct GNUNET_ATS_Session *s = cls;
1668 struct HTTP_Server_Plugin *plugin = s->plugin;
1669 struct GNUNET_TIME_Relative delay;
1670 char *stat_txt;
1671
1672 if (GNUNET_NO == s->known_to_service)
1673 {
1674 s->known_to_service = GNUNET_YES;
1675 plugin->env->session_start (plugin->env->cls,
1676 s->address,
1677 s,
1678 s->scope);
1679 notify_session_monitor (plugin,
1680 s,
1681 GNUNET_TRANSPORT_SS_UP);
1682 }
1683 delay = plugin->env->receive (plugin->env->cls,
1684 s->address,
1685 s,
1686 message);
1687 GNUNET_asprintf (&stat_txt,
1688 "# bytes received via %s_server",
1689 plugin->protocol);
1690 GNUNET_STATISTICS_update (plugin->env->stats,
1691 stat_txt,
1692 ntohs (message->size),
1693 GNUNET_NO);
1694 GNUNET_free (stat_txt);
1695 s->next_receive = GNUNET_TIME_relative_to_absolute (delay);
1696 if (delay.rel_value_us > 0)
1697 {
1698 LOG (GNUNET_ERROR_TYPE_DEBUG,
1699 "Peer `%s' address `%s' next read delayed for %s\n",
1700 GNUNET_i2s (&s->target),
1701 http_common_plugin_address_to_string (plugin->protocol,
1702 s->address->address,
1703 s->address->address_length),
1704 GNUNET_STRINGS_relative_time_to_string (delay,
1705 GNUNET_YES));
1706 }
1707 server_reschedule_session_timeout (s);
1708 return GNUNET_OK;
1709}
1710
1711
1712/**
1713 * Add headers to a request indicating that we allow Cross-Origin Resource
1714 * Sharing.
1715 *
1716 * @param response response object to modify
1717 */
1718static void
1719add_cors_headers (struct MHD_Response *response)
1720{
1721 MHD_add_response_header (response,
1722 "Access-Control-Allow-Origin",
1723 "*");
1724 MHD_add_response_header (response,
1725 "Access-Control-Allow-Methods",
1726 "GET, PUT, OPTIONS");
1727 MHD_add_response_header (response,
1728 "Access-Control-Max-Age",
1729 "86400");
1730}
1731
1732
1733/**
1734 * MHD callback for a new incoming connection
1735 *
1736 * @param cls the plugin handle
1737 * @param mhd_connection the mhd connection
1738 * @param url the requested URL
1739 * @param method GET or PUT
1740 * @param version HTTP version
1741 * @param upload_data upload data
1742 * @param upload_data_size size of @a upload_data
1743 * @param httpSessionCache the session cache to remember the connection
1744 * @return #MHD_YES if connection is accepted, #MHD_NO on reject
1745 */
1746static MHD_RESULT
1747server_access_cb (void *cls,
1748 struct MHD_Connection *mhd_connection,
1749 const char *url,
1750 const char *method,
1751 const char *version,
1752 const char *upload_data,
1753 size_t *upload_data_size,
1754 void **httpSessionCache)
1755{
1756 struct HTTP_Server_Plugin *plugin = cls;
1757 struct ServerRequest *sc = *httpSessionCache;
1758 struct GNUNET_ATS_Session *s;
1759 struct MHD_Response *response;
1760 MHD_RESULT res = MHD_YES;
1761
1762 LOG (GNUNET_ERROR_TYPE_DEBUG,
1763 _ (
1764 "Access from connection %p (%u of %u) for `%s' `%s' url `%s' with upload data size %lu\n"),
1765 sc,
1766 plugin->cur_request,
1767 plugin->max_request,
1768 method,
1769 version,
1770 url,
1771 (unsigned long) (*upload_data_size));
1772 if (NULL == sc)
1773 {
1774 /* CORS pre-flight request */
1775 if (0 == strcmp (MHD_HTTP_METHOD_OPTIONS, method))
1776 {
1777 response = MHD_create_response_from_buffer (0, NULL,
1778 MHD_RESPMEM_PERSISTENT);
1779 add_cors_headers (response);
1780 res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
1781 MHD_destroy_response (response);
1782 return res;
1783 }
1784 /* new connection */
1785 sc = server_lookup_connection (plugin, mhd_connection, url, method);
1786 if (NULL != sc)
1787 {
1788 /* attach to new / existing session */
1789 (*httpSessionCache) = sc;
1790 }
1791 else
1792 {
1793 /* existing session already has matching connection, refuse */
1794 response = MHD_create_response_from_buffer (strlen (HTTP_ERROR_RESPONSE),
1795 HTTP_ERROR_RESPONSE,
1796 MHD_RESPMEM_PERSISTENT);
1797 MHD_add_response_header (response,
1798 MHD_HTTP_HEADER_CONTENT_TYPE,
1799 "text/html");
1800 add_cors_headers (response);
1801 res = MHD_queue_response (mhd_connection, MHD_HTTP_NOT_FOUND, response);
1802 MHD_destroy_response (response);
1803 return res;
1804 }
1805 }
1806 /* 'old' connection */
1807 if (NULL == (s = sc->session))
1808 {
1809 /* Session was already disconnected;
1810 sent HTTP/1.1: 200 OK as response */
1811 response = MHD_create_response_from_buffer (strlen ("Thank you!"),
1812 "Thank you!",
1813 MHD_RESPMEM_PERSISTENT);
1814 add_cors_headers (response);
1815 MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
1816 MHD_destroy_response (response);
1817 return MHD_YES;
1818 }
1819
1820 if (sc->direction == _SEND)
1821 {
1822 response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN, 32 * 1024,
1823 &server_send_callback, sc,
1824 NULL);
1825 add_cors_headers (response);
1826 MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
1827 MHD_destroy_response (response);
1828 return MHD_YES;
1829 }
1830 if (sc->direction == _RECEIVE)
1831 {
1832 if ((*upload_data_size == 0) && (sc->connected == GNUNET_NO))
1833 {
1834 /* (*upload_data_size == 0) first callback when header are passed */
1835 LOG (GNUNET_ERROR_TYPE_DEBUG,
1836 "Session %p / Connection %p: Peer `%s' PUT on address `%s' connected\n",
1837 s, sc,
1838 GNUNET_i2s (&s->target),
1839 http_common_plugin_address_to_string (plugin->protocol,
1840 s->address->address,
1841 s->address->address_length));
1842 sc->connected = GNUNET_YES;
1843 return MHD_YES;
1844 }
1845 else if ((*upload_data_size == 0) && (sc->connected == GNUNET_YES))
1846 {
1847 /* (*upload_data_size == 0) when upload is complete */
1848 LOG (GNUNET_ERROR_TYPE_DEBUG,
1849 "Session %p / Connection %p: Peer `%s' PUT on address `%s' finished upload\n",
1850 s, sc,
1851 GNUNET_i2s (&s->target),
1852 http_common_plugin_address_to_string (plugin->protocol,
1853 s->address->address,
1854 s->address->address_length));
1855 sc->connected = GNUNET_NO;
1856 /* Sent HTTP/1.1: 200 OK as PUT Response\ */
1857 response = MHD_create_response_from_buffer (strlen ("Thank you!"),
1858 "Thank you!",
1859 MHD_RESPMEM_PERSISTENT);
1860 add_cors_headers (response);
1861 MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
1862 MHD_destroy_response (response);
1863 return MHD_YES;
1864 }
1865 else if ((*upload_data_size > 0) && (sc->connected == GNUNET_YES))
1866 {
1867 struct GNUNET_TIME_Relative delay;
1868
1869 /* (*upload_data_size > 0) for every segment received */
1870 LOG (GNUNET_ERROR_TYPE_DEBUG,
1871 "Session %p / Connection %p: Peer `%s' PUT on address `%s' received %lu bytes\n",
1872 s, sc,
1873 GNUNET_i2s (&s->target),
1874 http_common_plugin_address_to_string (plugin->protocol,
1875 s->address->address,
1876 s->address->address_length),
1877 (unsigned long) *upload_data_size);
1878 delay = GNUNET_TIME_absolute_get_remaining (s->next_receive);
1879 if (0 == delay.rel_value_us)
1880 {
1881 LOG (GNUNET_ERROR_TYPE_DEBUG,
1882 "PUT with %lu bytes forwarded to MST\n",
1883 (unsigned long) *upload_data_size);
1884 if (s->msg_tk == NULL)
1885 {
1886 s->msg_tk = GNUNET_MST_create (&server_receive_mst_cb,
1887 s);
1888 }
1889 GNUNET_MST_from_buffer (s->msg_tk,
1890 upload_data,
1891 *upload_data_size,
1892 GNUNET_NO, GNUNET_NO);
1893 server_mhd_connection_timeout (plugin, s,
1894 GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.
1895 rel_value_us / 1000LL
1896 / 1000LL);
1897 (*upload_data_size) = 0;
1898 }
1899 else
1900 {
1901 /* delay processing */
1902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1903 "Session %p / Connection %p: no inbound bandwidth available! Next read was delayed by %s\n",
1904 s,
1905 sc,
1906 GNUNET_STRINGS_relative_time_to_string (delay,
1907 GNUNET_YES));
1908 GNUNET_assert (s->server_recv->mhd_conn == mhd_connection);
1909 MHD_suspend_connection (s->server_recv->mhd_conn);
1910 s->server_recv->suspended = true;
1911 if (NULL == s->recv_wakeup_task)
1912 s->recv_wakeup_task
1913 = GNUNET_SCHEDULER_add_delayed (delay,
1914 &server_wake_up,
1915 s);
1916 }
1917 return MHD_YES;
1918 }
1919 else
1920 {
1921 GNUNET_break (0);
1922 return MHD_NO;
1923 }
1924 }
1925 return res;
1926}
1927
1928
1929/**
1930 * Callback from MHD when a connection disconnects
1931 *
1932 * @param cls closure with the `struct HTTP_Server_Plugin *`
1933 * @param connection the disconnected MHD connection
1934 * @param httpSessionCache the pointer to distinguish
1935 */
1936static void
1937server_disconnect_cb (void *cls,
1938 struct MHD_Connection *connection,
1939 void **httpSessionCache)
1940{
1941 struct HTTP_Server_Plugin *plugin = cls;
1942 struct ServerRequest *sc = *httpSessionCache;
1943
1944 LOG (GNUNET_ERROR_TYPE_DEBUG,
1945 "Disconnect for connection %p\n",
1946 sc);
1947 if (NULL == sc)
1948 {
1949 /* CORS pre-flight request finished */
1950 return;
1951 }
1952
1953 if (NULL != sc->session)
1954 {
1955 if (sc->direction == _SEND)
1956 {
1957 LOG (GNUNET_ERROR_TYPE_DEBUG,
1958 "Peer `%s' connection %p, GET on address `%s' disconnected\n",
1959 GNUNET_i2s (&sc->session->target),
1960 sc->session->server_send,
1961 http_common_plugin_address_to_string (plugin->protocol,
1962 sc->session->address->address,
1963 sc->session->address->
1964 address_length));
1965
1966 sc->session->server_send = NULL;
1967 }
1968 else if (sc->direction == _RECEIVE)
1969 {
1970 LOG (GNUNET_ERROR_TYPE_DEBUG,
1971 "Peer `%s' connection %p PUT on address `%s' disconnected\n",
1972 GNUNET_i2s (&sc->session->target),
1973 sc->session->server_recv,
1974 http_common_plugin_address_to_string (plugin->protocol,
1975 sc->session->address->address,
1976 sc->session->address->
1977 address_length));
1978 sc->session->server_recv = NULL;
1979 if (NULL != sc->session->msg_tk)
1980 {
1981 GNUNET_MST_destroy (sc->session->msg_tk);
1982 sc->session->msg_tk = NULL;
1983 }
1984 }
1985 }
1986 GNUNET_free (sc);
1987 plugin->cur_request--;
1988}
1989
1990
1991/**
1992 * Callback from MHD when a connection starts/stops
1993 *
1994 * @param cls closure with the `struct HTTP_Server_Plugin *`
1995 * @param connection connection handle
1996 * @param socket_context socket-specific pointer
1997 * @param toe reason for connection notification
1998 * @see #MHD_OPTION_NOTIFY_CONNECTION
1999 */
2000static void
2001server_connection_cb (void *cls,
2002 struct MHD_Connection *connection,
2003 void **socket_context,
2004 enum MHD_ConnectionNotificationCode toe)
2005{
2006 struct HTTP_Server_Plugin *plugin = cls;
2007 const union MHD_ConnectionInfo *info;
2008
2009 if (MHD_CONNECTION_NOTIFY_STARTED == toe)
2010 return;
2011
2012 /* Reschedule to remove closed socket from our select set */
2013 info = MHD_get_connection_info (connection,
2014 MHD_CONNECTION_INFO_DAEMON);
2015 GNUNET_assert (NULL != info);
2016 server_reschedule (plugin,
2017 info->daemon,
2018 GNUNET_YES);
2019}
2020
2021
2022/**
2023 * Check if incoming connection is accepted.
2024 *
2025 * @param cls plugin as closure
2026 * @param addr address of incoming connection
2027 * @param addr_len number of bytes in @a addr
2028 * @return #MHD_YES if connection is accepted, #MHD_NO if connection is rejected
2029 */
2030static MHD_RESULT
2031server_accept_cb (void *cls,
2032 const struct sockaddr *addr,
2033 socklen_t addr_len)
2034{
2035 struct HTTP_Server_Plugin *plugin = cls;
2036
2037 if (plugin->cur_request <= plugin->max_request)
2038 {
2039 LOG (GNUNET_ERROR_TYPE_DEBUG,
2040 _ ("Accepting connection (%u of %u) from `%s'\n"),
2041 plugin->cur_request, plugin->max_request,
2042 GNUNET_a2s (addr, addr_len));
2043 return MHD_YES;
2044 }
2045 else
2046 {
2047 LOG (GNUNET_ERROR_TYPE_WARNING,
2048 _ (
2049 "Server reached maximum number connections (%u), rejecting new connection\n"),
2050 plugin->max_request);
2051 return MHD_NO;
2052 }
2053}
2054
2055
2056/**
2057 * Log function called by MHD.
2058 *
2059 * @param arg NULL
2060 * @param fmt format string
2061 * @param ap arguments for the format string (va_start() and va_end()
2062 * will be called by MHD)
2063 */
2064static void
2065server_log (void *arg,
2066 const char *fmt,
2067 va_list ap)
2068{
2069 char text[1024];
2070
2071 vsnprintf (text,
2072 sizeof(text),
2073 fmt,
2074 ap);
2075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2076 "Server: %s\n",
2077 text);
2078}
2079
2080
2081#if BUILD_HTTPS
2082/**
2083 * Load ssl certificate from file
2084 *
2085 * @param file filename
2086 * @return content of the file
2087 */
2088static char *
2089server_load_file (const char *file)
2090{
2091 struct GNUNET_DISK_FileHandle *gn_file;
2092 uint64_t fsize;
2093 char *text = NULL;
2094
2095 if (GNUNET_OK != GNUNET_DISK_file_size (file,
2096 &fsize, GNUNET_NO, GNUNET_YES))
2097 return NULL;
2098 text = GNUNET_malloc (fsize + 1);
2099 gn_file =
2100 GNUNET_DISK_file_open (file, GNUNET_DISK_OPEN_READ,
2101 GNUNET_DISK_PERM_USER_READ);
2102 if (NULL == gn_file)
2103 {
2104 GNUNET_free (text);
2105 return NULL;
2106 }
2107 if (GNUNET_SYSERR == GNUNET_DISK_file_read (gn_file, text, fsize))
2108 {
2109 GNUNET_free (text);
2110 GNUNET_DISK_file_close (gn_file);
2111 return NULL;
2112 }
2113 text[fsize] = '\0';
2114 GNUNET_DISK_file_close (gn_file);
2115 return text;
2116}
2117
2118
2119#endif
2120
2121
2122#if BUILD_HTTPS
2123/**
2124 * Load ssl certificate
2125 *
2126 * @param plugin the plugin
2127 * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
2128 */
2129static int
2130server_load_certificate (struct HTTP_Server_Plugin *plugin)
2131{
2132 int res = GNUNET_OK;
2133 char *key_file;
2134 char *cert_file;
2135
2136
2137 if (GNUNET_OK !=
2138 GNUNET_CONFIGURATION_get_value_filename (plugin->env->cfg,
2139 plugin->name,
2140 "KEY_FILE", &key_file))
2141 {
2142 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2143 plugin->name, "CERT_FILE");
2144 return GNUNET_SYSERR;
2145 }
2146 if (GNUNET_OK !=
2147 GNUNET_CONFIGURATION_get_value_filename (plugin->env->cfg,
2148 plugin->name,
2149 "CERT_FILE", &cert_file))
2150 {
2151 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2152 plugin->name, "CERT_FILE");
2153 GNUNET_free (key_file);
2154 return GNUNET_SYSERR;
2155 }
2156 /* Get crypto init string from config. If not present, use
2157 * default values */
2158 if (GNUNET_OK ==
2159 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg,
2160 plugin->name,
2161 "CRYPTO_INIT",
2162 &plugin->crypto_init))
2163 LOG (GNUNET_ERROR_TYPE_DEBUG,
2164 "Using crypto init string `%s'\n",
2165 plugin->crypto_init);
2166 else
2167 LOG (GNUNET_ERROR_TYPE_DEBUG,
2168 "Using default crypto init string \n");
2169
2170 /* read key & certificates from file */
2171 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2172 "Trying to loading TLS certificate from key-file `%s' cert-file`%s'\n",
2173 key_file, cert_file);
2174
2175 plugin->key = server_load_file (key_file);
2176 plugin->cert = server_load_file (cert_file);
2177
2178 if ((plugin->key == NULL) || (plugin->cert == NULL))
2179 {
2180 struct GNUNET_OS_Process *cert_creation;
2181
2182 GNUNET_free (plugin->key);
2183 plugin->key = NULL;
2184 GNUNET_free (plugin->cert);
2185 plugin->cert = NULL;
2186
2187 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2188 "No usable TLS certificate found, creating certificate\n");
2189 errno = 0;
2190 cert_creation =
2191 GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_OUT_AND_ERR,
2192 NULL, NULL, NULL,
2193 "gnunet-transport-certificate-creation",
2194 "gnunet-transport-certificate-creation",
2195 key_file,
2196 cert_file,
2197 NULL);
2198 if (NULL == cert_creation)
2199 {
2200 LOG (GNUNET_ERROR_TYPE_ERROR,
2201 _ (
2202 "Could not create a new TLS certificate, program `gnunet-transport-certificate-creation' could not be started!\n"));
2203 GNUNET_free (key_file);
2204 GNUNET_free (cert_file);
2205
2206 GNUNET_free (plugin->key);
2207 plugin->key = NULL;
2208 GNUNET_free (plugin->cert);
2209 plugin->cert = NULL;
2210 GNUNET_free (plugin->crypto_init);
2211 plugin->crypto_init = NULL;
2212
2213 return GNUNET_SYSERR;
2214 }
2215 GNUNET_assert (GNUNET_OK == GNUNET_OS_process_wait (cert_creation));
2216 GNUNET_OS_process_destroy (cert_creation);
2217
2218 plugin->key = server_load_file (key_file);
2219 plugin->cert = server_load_file (cert_file);
2220 }
2221
2222 if ((plugin->key == NULL) || (plugin->cert == NULL))
2223 {
2224 LOG (GNUNET_ERROR_TYPE_ERROR,
2225 _ (
2226 "No usable TLS certificate found and creating one at `%s/%s' failed!\n"),
2227 key_file, cert_file);
2228 GNUNET_free (key_file);
2229 GNUNET_free (cert_file);
2230
2231 GNUNET_free (plugin->key);
2232 plugin->key = NULL;
2233 GNUNET_free (plugin->cert);
2234 plugin->cert = NULL;
2235 GNUNET_free (plugin->crypto_init);
2236 plugin->crypto_init = NULL;
2237
2238 return GNUNET_SYSERR;
2239 }
2240 GNUNET_free (key_file);
2241 GNUNET_free (cert_file);
2242 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2243 "TLS certificate loaded\n");
2244 return res;
2245}
2246
2247
2248#endif
2249
2250
2251/**
2252 * Invoke `MHD_start_daemon` with the various options we need to
2253 * setup the HTTP server with the given listen address.
2254 *
2255 * @param plugin our plugin
2256 * @param addr listen address to use
2257 * @param v6 MHD_NO_FLAG or MHD_USE_IPv6, depending on context
2258 * @return NULL on error
2259 */
2260static struct MHD_Daemon *
2261run_mhd_start_daemon (struct HTTP_Server_Plugin *plugin,
2262 const struct sockaddr_in *addr,
2263 int v6)
2264{
2265 struct MHD_Daemon *server;
2266 unsigned int timeout;
2267
2268#if MHD_VERSION >= 0x00090E00
2269 timeout = HTTP_SERVER_NOT_VALIDATED_TIMEOUT.rel_value_us / 1000LL / 1000LL;
2270 LOG (GNUNET_ERROR_TYPE_DEBUG,
2271 "MHD can set timeout per connection! Default time out %u sec.\n",
2272 timeout);
2273#else
2274 timeout = HTTP_SERVER_SESSION_TIMEOUT.rel_value_us / 1000LL / 1000LL;
2275 LOG (GNUNET_ERROR_TYPE_WARNING,
2276 "MHD cannot set timeout per connection! Default time out %u sec.\n",
2277 timeout);
2278#endif
2279 server = MHD_start_daemon (
2280#if VERBOSE_SERVER
2281 MHD_USE_DEBUG |
2282#endif
2283#if BUILD_HTTPS
2284 MHD_USE_SSL |
2285#endif
2286 MHD_USE_SUSPEND_RESUME
2287 | v6,
2288 plugin->port,
2289 &server_accept_cb, plugin,
2290 &server_access_cb, plugin,
2291 MHD_OPTION_SOCK_ADDR,
2292 addr,
2293 MHD_OPTION_CONNECTION_LIMIT,
2294 (unsigned int) plugin->max_request,
2295#if BUILD_HTTPS
2296 MHD_OPTION_HTTPS_PRIORITIES,
2297 plugin->crypto_init,
2298 MHD_OPTION_HTTPS_MEM_KEY,
2299 plugin->key,
2300 MHD_OPTION_HTTPS_MEM_CERT,
2301 plugin->cert,
2302#endif
2303 MHD_OPTION_CONNECTION_TIMEOUT,
2304 timeout,
2305 MHD_OPTION_CONNECTION_MEMORY_LIMIT,
2306 (size_t) (2
2307 * GNUNET_MAX_MESSAGE_SIZE),
2308 MHD_OPTION_NOTIFY_COMPLETED,
2309 &server_disconnect_cb, plugin,
2310 MHD_OPTION_NOTIFY_CONNECTION,
2311 &server_connection_cb, plugin,
2312 MHD_OPTION_EXTERNAL_LOGGER,
2313 &server_log, NULL,
2314 MHD_OPTION_END);
2315#ifdef TCP_STEALTH
2316 if ((NULL != server) &&
2317 (0 != (plugin->options & HTTP_OPTIONS_TCP_STEALTH)))
2318 {
2319 const union MHD_DaemonInfo *di;
2320
2321 di = MHD_get_daemon_info (server,
2322 MHD_DAEMON_INFO_LISTEN_FD,
2323 NULL);
2324 if ((0 != setsockopt ((int) di->listen_fd,
2325 IPPROTO_TCP,
2326 TCP_STEALTH,
2327 plugin->env->my_identity,
2328 sizeof(struct GNUNET_PeerIdentity))))
2329 {
2330 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2331 _ ("TCP_STEALTH not supported on this platform.\n"));
2332 MHD_stop_daemon (server);
2333 server = NULL;
2334 }
2335 }
2336#endif
2337 return server;
2338}
2339
2340
2341/**
2342 * Start the HTTP server
2343 *
2344 * @param plugin the plugin handle
2345 * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
2346 */
2347static int
2348server_start (struct HTTP_Server_Plugin *plugin)
2349{
2350 const char *msg;
2351
2352 GNUNET_assert (NULL != plugin);
2353#if BUILD_HTTPS
2354 if (GNUNET_SYSERR == server_load_certificate (plugin))
2355 {
2356 LOG (GNUNET_ERROR_TYPE_ERROR,
2357 _ (
2358 "Could not load or create server certificate! Loading plugin failed!\n"));
2359 return GNUNET_SYSERR;
2360 }
2361#endif
2362
2363
2364 plugin->server_v4 = NULL;
2365 if (GNUNET_YES == plugin->use_ipv4)
2366 {
2367 plugin->server_v4
2368 = run_mhd_start_daemon (plugin,
2369 (const struct
2370 sockaddr_in *) plugin->server_addr_v4,
2371 MHD_NO_FLAG);
2372
2373 if (NULL == plugin->server_v4)
2374 {
2375 LOG (GNUNET_ERROR_TYPE_ERROR,
2376 "Failed to start %s IPv4 server component on port %u\n",
2377 plugin->name,
2378 plugin->port);
2379 }
2380 else
2381 server_reschedule (plugin,
2382 plugin->server_v4,
2383 GNUNET_NO);
2384 }
2385
2386
2387 plugin->server_v6 = NULL;
2388 if (GNUNET_YES == plugin->use_ipv6)
2389 {
2390 plugin->server_v6
2391 = run_mhd_start_daemon (plugin,
2392 (const struct
2393 sockaddr_in *) plugin->server_addr_v6,
2394 MHD_USE_IPv6);
2395 if (NULL == plugin->server_v6)
2396 {
2397 LOG (GNUNET_ERROR_TYPE_ERROR,
2398 "Failed to start %s IPv6 server component on port %u\n",
2399 plugin->name,
2400 plugin->port);
2401 }
2402 else
2403 {
2404 server_reschedule (plugin,
2405 plugin->server_v6,
2406 GNUNET_NO);
2407 }
2408 }
2409 msg = "No";
2410 if ((NULL == plugin->server_v6) &&
2411 (NULL == plugin->server_v4))
2412 {
2413 LOG (GNUNET_ERROR_TYPE_ERROR,
2414 "%s %s server component started on port %u\n",
2415 msg,
2416 plugin->name,
2417 plugin->port);
2418 return GNUNET_SYSERR;
2419 }
2420 if ((NULL != plugin->server_v6) &&
2421 (NULL != plugin->server_v4))
2422 msg = "IPv4 and IPv6";
2423 else if (NULL != plugin->server_v6)
2424 msg = "IPv6";
2425 else if (NULL != plugin->server_v4)
2426 msg = "IPv4";
2427 LOG (GNUNET_ERROR_TYPE_DEBUG,
2428 "%s %s server component started on port %u\n",
2429 msg,
2430 plugin->name,
2431 plugin->port);
2432 return GNUNET_OK;
2433}
2434
2435
2436/**
2437 * Add an address to the server's set of addresses and notify transport
2438 *
2439 * @param cls the plugin handle
2440 * @param add_remove #GNUNET_YES on add, #GNUNET_NO on remove
2441 * @param addr the address
2442 * @param addrlen address length
2443 */
2444static void
2445server_add_address (void *cls,
2446 int add_remove,
2447 const struct sockaddr *addr,
2448 socklen_t addrlen)
2449{
2450 struct HTTP_Server_Plugin *plugin = cls;
2451 struct GNUNET_HELLO_Address *address;
2452 struct HttpAddressWrapper *w = NULL;
2453
2454 w = GNUNET_new (struct HttpAddressWrapper);
2455 w->address = http_common_address_from_socket (plugin->protocol,
2456 addr,
2457 addrlen);
2458 if (NULL == w->address)
2459 {
2460 GNUNET_free (w);
2461 return;
2462 }
2463 w->addrlen = http_common_address_get_size (w->address);
2464
2465 GNUNET_CONTAINER_DLL_insert (plugin->addr_head,
2466 plugin->addr_tail,
2467 w);
2468 LOG (GNUNET_ERROR_TYPE_DEBUG,
2469 "Notifying transport to add address `%s'\n",
2470 http_common_plugin_address_to_string (plugin->protocol,
2471 w->address,
2472 w->addrlen));
2473 /* modify our published address list */
2474#if BUILD_HTTPS
2475 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
2476 "https_client", w->address,
2477 w->addrlen,
2478 GNUNET_HELLO_ADDRESS_INFO_NONE);
2479#else
2480 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
2481 "http_client", w->address,
2482 w->addrlen,
2483 GNUNET_HELLO_ADDRESS_INFO_NONE);
2484#endif
2485
2486 plugin->env->notify_address (plugin->env->cls,
2487 add_remove,
2488 address);
2489 GNUNET_HELLO_address_free (address);
2490}
2491
2492
2493/**
2494 * Remove an address from the server's set of addresses and notify transport
2495 *
2496 * @param cls the plugin handle
2497 * @param add_remove #GNUNET_YES on add, #GNUNET_NO on remove
2498 * @param addr the address
2499 * @param addrlen address length
2500 */
2501static void
2502server_remove_address (void *cls,
2503 int add_remove,
2504 const struct sockaddr *addr,
2505 socklen_t addrlen)
2506{
2507 struct HTTP_Server_Plugin *plugin = cls;
2508 struct GNUNET_HELLO_Address *address;
2509 struct HttpAddressWrapper *w = plugin->addr_head;
2510 size_t saddr_len;
2511 void *saddr;
2512
2513 saddr = http_common_address_from_socket (plugin->protocol,
2514 addr,
2515 addrlen);
2516 if (NULL == saddr)
2517 return;
2518 saddr_len = http_common_address_get_size (saddr);
2519
2520 while (NULL != w)
2521 {
2522 if (GNUNET_YES ==
2523 http_common_cmp_addresses (w->address,
2524 w->addrlen,
2525 saddr,
2526 saddr_len))
2527 break;
2528 w = w->next;
2529 }
2530 GNUNET_free (saddr);
2531
2532 if (NULL == w)
2533 return;
2534
2535 LOG (GNUNET_ERROR_TYPE_DEBUG,
2536 "Notifying transport to remove address `%s'\n",
2537 http_common_plugin_address_to_string (plugin->protocol,
2538 w->address,
2539 w->addrlen));
2540 GNUNET_CONTAINER_DLL_remove (plugin->addr_head,
2541 plugin->addr_tail,
2542 w);
2543 /* modify our published address list */
2544#if BUILD_HTTPS
2545 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
2546 "https_client", w->address,
2547 w->addrlen,
2548 GNUNET_HELLO_ADDRESS_INFO_NONE);
2549#else
2550 address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
2551 "http_client", w->address,
2552 w->addrlen,
2553 GNUNET_HELLO_ADDRESS_INFO_NONE);
2554#endif
2555 plugin->env->notify_address (plugin->env->cls, add_remove, address);
2556 GNUNET_HELLO_address_free (address);
2557 GNUNET_free (w->address);
2558 GNUNET_free (w);
2559}
2560
2561
2562/**
2563 * Our external IP address/port mapping has changed.
2564 *
2565 * @param cls closure, the 'struct LocalAddrList'
2566 * @param app_ctx[in,out] location where the app can store stuff
2567 * on add and retrieve it on remove
2568 * @param add_remove #GNUNET_YES to mean the new public IP address, #GNUNET_NO to mean
2569 * the previous (now invalid) one
2570 * @param ac address class the address belongs to
2571 * @param addr either the previous or the new public IP address
2572 * @param addrlen actual length of the address
2573 */
2574static void
2575server_nat_port_map_callback (void *cls,
2576 void **app_ctx,
2577 int add_remove,
2578 enum GNUNET_NAT_AddressClass ac,
2579 const struct sockaddr *addr,
2580 socklen_t addrlen)
2581{
2582 struct HTTP_Server_Plugin *plugin = cls;
2583
2584 (void) app_ctx;
2585 LOG (GNUNET_ERROR_TYPE_DEBUG,
2586 "NAT called to %s address `%s'\n",
2587 (add_remove == GNUNET_NO) ? "remove" : "add",
2588 GNUNET_a2s (addr, addrlen));
2589
2590 if (AF_INET == addr->sa_family)
2591 {
2592 struct sockaddr_in *s4 = (struct sockaddr_in *) addr;
2593
2594 if (GNUNET_NO == plugin->use_ipv4)
2595 return;
2596
2597 if ((NULL != plugin->server_addr_v4) &&
2598 (0 != memcmp (&plugin->server_addr_v4->sin_addr,
2599 &s4->sin_addr,
2600 sizeof(struct in_addr))))
2601 {
2602 LOG (GNUNET_ERROR_TYPE_DEBUG,
2603 "Skipping address `%s' (not bindto address)\n",
2604 GNUNET_a2s (addr, addrlen));
2605 return;
2606 }
2607 }
2608
2609 if (AF_INET6 == addr->sa_family)
2610 {
2611 struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) addr;
2612 if (GNUNET_NO == plugin->use_ipv6)
2613 return;
2614
2615 if ((NULL != plugin->server_addr_v6) &&
2616 (0 != memcmp (&plugin->server_addr_v6->sin6_addr,
2617 &s6->sin6_addr, sizeof(struct in6_addr))))
2618 {
2619 LOG (GNUNET_ERROR_TYPE_DEBUG,
2620 "Skipping address `%s' (not bindto address)\n",
2621 GNUNET_a2s (addr, addrlen));
2622 return;
2623 }
2624 }
2625
2626 switch (add_remove)
2627 {
2628 case GNUNET_YES:
2629 server_add_address (cls, add_remove, addr, addrlen);
2630 break;
2631
2632 case GNUNET_NO:
2633 server_remove_address (cls, add_remove, addr, addrlen);
2634 break;
2635 }
2636}
2637
2638
2639/**
2640 * Get valid server addresses
2641 *
2642 * @param plugin the plugin handle
2643 * @param service_name the servicename
2644 * @param cfg configuration handle
2645 * @param addrs addresses
2646 * @param addr_lens address length
2647 * @return number of addresses
2648 */
2649static int
2650server_get_addresses (struct HTTP_Server_Plugin *plugin,
2651 const char *service_name,
2652 const struct GNUNET_CONFIGURATION_Handle *cfg,
2653 struct sockaddr ***addrs,
2654 socklen_t **addr_lens)
2655{
2656 int disablev6;
2657 unsigned long long port;
2658 struct addrinfo hints;
2659 struct addrinfo *res;
2660 struct addrinfo *pos;
2661 struct addrinfo *next;
2662 unsigned int i;
2663 int resi;
2664 int ret;
2665 struct sockaddr **saddrs;
2666 socklen_t *saddrlens;
2667 char *hostname;
2668
2669 *addrs = NULL;
2670 *addr_lens = NULL;
2671
2672 disablev6 = ! plugin->use_ipv6;
2673
2674 port = 0;
2675 if (GNUNET_CONFIGURATION_have_value (cfg, service_name, "PORT"))
2676 {
2677 GNUNET_break (GNUNET_OK ==
2678 GNUNET_CONFIGURATION_get_value_number (cfg, service_name,
2679 "PORT", &port));
2680 if (port > 65535)
2681 {
2682 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2683 _ (
2684 "Require valid port number for service in configuration!\n"));
2685 return GNUNET_SYSERR;
2686 }
2687 }
2688 if (0 == port)
2689 {
2690 LOG (GNUNET_ERROR_TYPE_INFO,
2691 "Starting in listen only mode\n");
2692 return -1; /* listen only */
2693 }
2694
2695
2696 if (GNUNET_CONFIGURATION_have_value (cfg, service_name,
2697 "BINDTO"))
2698 {
2699 GNUNET_break (GNUNET_OK ==
2700 GNUNET_CONFIGURATION_get_value_string (cfg, service_name,
2701 "BINDTO", &hostname));
2702 }
2703 else
2704 hostname = NULL;
2705
2706 if (NULL != hostname)
2707 {
2708 LOG (GNUNET_ERROR_TYPE_DEBUG,
2709 "Resolving `%s' since that is where `%s' will bind to.\n",
2710 hostname, service_name);
2711 memset (&hints, 0, sizeof(struct addrinfo));
2712 if (disablev6)
2713 hints.ai_family = AF_INET;
2714 if ((0 != (ret = getaddrinfo (hostname, NULL, &hints, &res))) ||
2715 (NULL == res))
2716 {
2717 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2718 _ ("Failed to resolve `%s': %s\n"),
2719 hostname,
2720 gai_strerror (ret));
2721 GNUNET_free (hostname);
2722 return GNUNET_SYSERR;
2723 }
2724 next = res;
2725 i = 0;
2726 while (NULL != (pos = next))
2727 {
2728 next = pos->ai_next;
2729 if ((disablev6) && (pos->ai_family == AF_INET6))
2730 continue;
2731 i++;
2732 }
2733 if (0 == i)
2734 {
2735 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2736 _ ("Failed to find %saddress for `%s'.\n"),
2737 disablev6 ? "IPv4 " : "", hostname);
2738 freeaddrinfo (res);
2739 GNUNET_free (hostname);
2740 return GNUNET_SYSERR;
2741 }
2742 resi = i;
2743 saddrs = GNUNET_malloc ((resi + 1) * sizeof(struct sockaddr *));
2744 saddrlens = GNUNET_malloc ((resi + 1) * sizeof(socklen_t));
2745 i = 0;
2746 next = res;
2747 while (NULL != (pos = next))
2748 {
2749 next = pos->ai_next;
2750 if ((disablev6) && (pos->ai_family == AF_INET6))
2751 continue;
2752 if ((pos->ai_protocol != IPPROTO_TCP) && (0 != pos->ai_protocol))
2753 continue; /* not TCP */
2754 if ((pos->ai_socktype != SOCK_STREAM) && (0 != pos->ai_socktype))
2755 continue; /* huh? */
2756 LOG (GNUNET_ERROR_TYPE_DEBUG,
2757 "Service will bind to `%s'\n",
2758 GNUNET_a2s (pos->ai_addr,
2759 pos->ai_addrlen));
2760 if (pos->ai_family == AF_INET)
2761 {
2762 GNUNET_assert (pos->ai_addrlen == sizeof(struct sockaddr_in));
2763 saddrlens[i] = pos->ai_addrlen;
2764 saddrs[i] = GNUNET_malloc (saddrlens[i]);
2765 GNUNET_memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
2766 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
2767 }
2768 else
2769 {
2770 GNUNET_assert (pos->ai_family == AF_INET6);
2771 GNUNET_assert (pos->ai_addrlen == sizeof(struct sockaddr_in6));
2772 saddrlens[i] = pos->ai_addrlen;
2773 saddrs[i] = GNUNET_malloc (saddrlens[i]);
2774 GNUNET_memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
2775 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
2776 }
2777 i++;
2778 }
2779 GNUNET_free (hostname);
2780 freeaddrinfo (res);
2781 resi = i;
2782 }
2783 else
2784 {
2785 /* will bind against everything, just set port */
2786 if (disablev6)
2787 {
2788 /* V4-only */
2789 resi = 1;
2790 i = 0;
2791 saddrs = GNUNET_malloc ((resi + 1) * sizeof(struct sockaddr *));
2792 saddrlens = GNUNET_malloc ((resi + 1) * sizeof(socklen_t));
2793
2794 saddrlens[i] = sizeof(struct sockaddr_in);
2795 saddrs[i] = GNUNET_malloc (saddrlens[i]);
2796#if HAVE_SOCKADDR_IN_SIN_LEN
2797 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[i];
2798#endif
2799 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
2800 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
2801 }
2802 else
2803 {
2804 /* dual stack */
2805 resi = 2;
2806 saddrs = GNUNET_malloc ((resi + 1) * sizeof(struct sockaddr *));
2807 saddrlens = GNUNET_malloc ((resi + 1) * sizeof(socklen_t));
2808 i = 0;
2809 saddrlens[i] = sizeof(struct sockaddr_in6);
2810 saddrs[i] = GNUNET_malloc (saddrlens[i]);
2811#if HAVE_SOCKADDR_IN_SIN_LEN
2812 ((struct sockaddr_in6 *) saddrs[i])->sin6_len = saddrlens[0];
2813#endif
2814 ((struct sockaddr_in6 *) saddrs[i])->sin6_family = AF_INET6;
2815 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
2816 i++;
2817 saddrlens[i] = sizeof(struct sockaddr_in);
2818 saddrs[i] = GNUNET_malloc (saddrlens[i]);
2819#if HAVE_SOCKADDR_IN_SIN_LEN
2820 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[1];
2821#endif
2822 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
2823 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
2824 }
2825 }
2826 *addrs = saddrs;
2827 *addr_lens = saddrlens;
2828 return resi;
2829}
2830
2831
2832/**
2833 * Ask NAT for addresses
2834 *
2835 * @param plugin the plugin handle
2836 */
2837static void
2838server_start_report_addresses (struct HTTP_Server_Plugin *plugin)
2839{
2840 int res = GNUNET_OK;
2841 struct sockaddr **addrs;
2842 socklen_t *addrlens;
2843
2844 res = server_get_addresses (plugin,
2845 plugin->name,
2846 plugin->env->cfg,
2847 &addrs, &addrlens);
2848 LOG (GNUNET_ERROR_TYPE_DEBUG,
2849 _ ("Found %u addresses to report to NAT service\n"),
2850 res);
2851
2852 if (GNUNET_SYSERR == res)
2853 {
2854 plugin->nat = NULL;
2855 return;
2856 }
2857
2858 plugin->nat
2859 = GNUNET_NAT_register (plugin->env->cfg,
2860 plugin->name,
2861 IPPROTO_TCP,
2862 (unsigned int) res,
2863 (const struct sockaddr **) addrs,
2864 addrlens,
2865 &server_nat_port_map_callback,
2866 NULL,
2867 plugin);
2868 while (res > 0)
2869 {
2870 res--;
2871 GNUNET_assert (NULL != addrs[res]);
2872 GNUNET_free (addrs[res]);
2873 }
2874 GNUNET_free (addrs);
2875 GNUNET_free (addrlens);
2876}
2877
2878
2879/**
2880 * Stop NAT for addresses
2881 *
2882 * @param plugin the plugin handle
2883 */
2884static void
2885server_stop_report_addresses (struct HTTP_Server_Plugin *plugin)
2886{
2887 struct HttpAddressWrapper *w;
2888
2889 /* Stop NAT handle */
2890 if (NULL != plugin->nat)
2891 {
2892 GNUNET_NAT_unregister (plugin->nat);
2893 plugin->nat = NULL;
2894 }
2895 /* Clean up addresses */
2896 while (NULL != plugin->addr_head)
2897 {
2898 w = plugin->addr_head;
2899 GNUNET_CONTAINER_DLL_remove (plugin->addr_head,
2900 plugin->addr_tail,
2901 w);
2902 GNUNET_free (w->address);
2903 GNUNET_free (w);
2904 }
2905}
2906
2907
2908/**
2909 * Check if IPv6 supported on this system
2910 *
2911 * @param plugin the plugin handle
2912 * @return #GNUNET_YES on success, else #GNUNET_NO
2913 */
2914static int
2915server_check_ipv6_support (struct HTTP_Server_Plugin *plugin)
2916{
2917 struct GNUNET_NETWORK_Handle *desc = NULL;
2918 int res = GNUNET_NO;
2919
2920 /* Probe IPv6 support */
2921 desc = GNUNET_NETWORK_socket_create (PF_INET6,
2922 SOCK_STREAM,
2923 0);
2924 if (NULL == desc)
2925 {
2926 if ((errno == ENOBUFS) ||
2927 (errno == ENOMEM) ||
2928 (errno == ENFILE) ||
2929 (errno == EACCES))
2930 {
2931 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
2932 "socket");
2933 }
2934 LOG (GNUNET_ERROR_TYPE_WARNING,
2935 _ ("Disabling IPv6 since it is not supported on this system!\n"));
2936 res = GNUNET_NO;
2937 }
2938 else
2939 {
2940 GNUNET_break (GNUNET_OK ==
2941 GNUNET_NETWORK_socket_close (desc));
2942 desc = NULL;
2943 res = GNUNET_YES;
2944 }
2945 LOG (GNUNET_ERROR_TYPE_DEBUG,
2946 "Testing IPv6 on this system: %s\n",
2947 (res == GNUNET_YES) ? "successful" : "failed");
2948 return res;
2949}
2950
2951
2952/**
2953 * Notify server about our external hostname
2954 *
2955 * @param cls plugin
2956 */
2957static void
2958server_notify_external_hostname (void *cls)
2959{
2960 struct HTTP_Server_Plugin *plugin = cls;
2961 struct HttpAddress *ext_addr;
2962 size_t ext_addr_len;
2963 unsigned int urlen;
2964 char *url;
2965
2966 plugin->notify_ext_task = NULL;
2967 GNUNET_asprintf (&url,
2968 "%s://%s",
2969 plugin->protocol,
2970 plugin->external_hostname);
2971 urlen = strlen (url) + 1;
2972 ext_addr = GNUNET_malloc (sizeof(struct HttpAddress) + urlen);
2973 ext_addr->options = htonl (plugin->options);
2974 ext_addr->urlen = htonl (urlen);
2975 ext_addr_len = sizeof(struct HttpAddress) + urlen;
2976 GNUNET_memcpy (&ext_addr[1], url, urlen);
2977 GNUNET_free (url);
2978
2979 LOG (GNUNET_ERROR_TYPE_DEBUG,
2980 "Notifying transport about external hostname address `%s'\n",
2981 plugin->external_hostname);
2982
2983#if BUILD_HTTPS
2984 if (GNUNET_YES == plugin->verify_external_hostname)
2985 LOG (GNUNET_ERROR_TYPE_INFO,
2986 "Enabling SSL verification for external hostname address `%s'\n",
2987 plugin->external_hostname);
2988 plugin->ext_addr
2989 = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
2990 "https_client",
2991 ext_addr,
2992 ext_addr_len,
2993 GNUNET_HELLO_ADDRESS_INFO_NONE);
2994 plugin->env->notify_address (plugin->env->cls,
2995 GNUNET_YES,
2996 plugin->ext_addr);
2997 GNUNET_free (ext_addr);
2998#else
2999 plugin->ext_addr
3000 = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
3001 "http_client",
3002 ext_addr,
3003 ext_addr_len,
3004 GNUNET_HELLO_ADDRESS_INFO_NONE);
3005 plugin->env->notify_address (plugin->env->cls,
3006 GNUNET_YES,
3007 plugin->ext_addr);
3008 GNUNET_free (ext_addr);
3009#endif
3010}
3011
3012
3013/**
3014 * Configure the plugin
3015 *
3016 * @param plugin plugin handle
3017 * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
3018 */
3019static int
3020server_configure_plugin (struct HTTP_Server_Plugin *plugin)
3021{
3022 unsigned long long port;
3023 unsigned long long max_connections;
3024 char *bind4_address = NULL;
3025 char *bind6_address = NULL;
3026 char *eh_tmp = NULL;
3027 int external_hostname_use_port;
3028
3029 /* Use IPv4? */
3030 if (GNUNET_CONFIGURATION_have_value
3031 (plugin->env->cfg, plugin->name, "USE_IPv4"))
3032 {
3033 plugin->use_ipv4 =
3034 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
3035 plugin->name,
3036 "USE_IPv4");
3037 }
3038 else
3039 plugin->use_ipv4 = GNUNET_YES;
3040 LOG (GNUNET_ERROR_TYPE_DEBUG,
3041 _ ("IPv4 support is %s\n"),
3042 (plugin->use_ipv4 == GNUNET_YES) ? "enabled" : "disabled");
3043
3044 /* Use IPv6? */
3045 if (GNUNET_CONFIGURATION_have_value
3046 (plugin->env->cfg, plugin->name, "USE_IPv6"))
3047 {
3048 plugin->use_ipv6 =
3049 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
3050 plugin->name,
3051 "USE_IPv6");
3052 }
3053 else
3054 plugin->use_ipv6 = GNUNET_YES;
3055 LOG (GNUNET_ERROR_TYPE_DEBUG,
3056 _ ("IPv6 support is %s\n"),
3057 (plugin->use_ipv6 == GNUNET_YES) ? "enabled" : "disabled");
3058
3059 if ((plugin->use_ipv4 == GNUNET_NO) && (plugin->use_ipv6 == GNUNET_NO))
3060 {
3061 LOG (GNUNET_ERROR_TYPE_ERROR,
3062 _ ("Neither IPv4 nor IPv6 are enabled! Fix in configuration\n"));
3063 return GNUNET_SYSERR;
3064 }
3065
3066 /* Reading port number from config file */
3067 if ((GNUNET_OK !=
3068 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg,
3069 plugin->name,
3070 "PORT", &port)) || (port > 65535))
3071 {
3072 LOG (GNUNET_ERROR_TYPE_ERROR,
3073 _ ("Port is required! Fix in configuration\n"));
3074 return GNUNET_SYSERR;
3075 }
3076 plugin->port = port;
3077
3078 LOG (GNUNET_ERROR_TYPE_INFO,
3079 _ ("Using port %u\n"), plugin->port);
3080
3081 if ((plugin->use_ipv4 == GNUNET_YES) &&
3082 (GNUNET_YES ==
3083 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg,
3084 plugin->name,
3085 "BINDTO",
3086 &bind4_address)))
3087 {
3088 LOG (GNUNET_ERROR_TYPE_DEBUG,
3089 "Binding %s plugin to specific IPv4 address: `%s'\n",
3090 plugin->protocol,
3091 bind4_address);
3092 plugin->server_addr_v4 = GNUNET_new (struct sockaddr_in);
3093 if (1 != inet_pton (AF_INET,
3094 bind4_address,
3095 &plugin->server_addr_v4->sin_addr))
3096 {
3097 LOG (GNUNET_ERROR_TYPE_ERROR,
3098 _ ("Specific IPv4 address `%s' in configuration file is invalid!\n"),
3099 bind4_address);
3100 GNUNET_free (bind4_address);
3101 GNUNET_free (plugin->server_addr_v4);
3102 plugin->server_addr_v4 = NULL;
3103 return GNUNET_SYSERR;
3104 }
3105 else
3106 {
3107 LOG (GNUNET_ERROR_TYPE_DEBUG,
3108 "Binding to IPv4 address %s\n",
3109 bind4_address);
3110 plugin->server_addr_v4->sin_family = AF_INET;
3111 plugin->server_addr_v4->sin_port = htons (plugin->port);
3112 }
3113 GNUNET_free (bind4_address);
3114 }
3115
3116 if ((plugin->use_ipv6 == GNUNET_YES) &&
3117 (GNUNET_YES ==
3118 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg,
3119 plugin->name,
3120 "BINDTO6",
3121 &bind6_address)))
3122 {
3123 LOG (GNUNET_ERROR_TYPE_DEBUG,
3124 "Binding %s plugin to specific IPv6 address: `%s'\n",
3125 plugin->protocol, bind6_address);
3126 plugin->server_addr_v6 = GNUNET_new (struct sockaddr_in6);
3127 if (1 !=
3128 inet_pton (AF_INET6,
3129 bind6_address,
3130 &plugin->server_addr_v6->sin6_addr))
3131 {
3132 LOG (GNUNET_ERROR_TYPE_ERROR,
3133 _ ("Specific IPv6 address `%s' in configuration file is invalid!\n"),
3134 bind6_address);
3135 GNUNET_free (bind6_address);
3136 GNUNET_free (plugin->server_addr_v6);
3137 plugin->server_addr_v6 = NULL;
3138 return GNUNET_SYSERR;
3139 }
3140 else
3141 {
3142 LOG (GNUNET_ERROR_TYPE_DEBUG,
3143 "Binding to IPv6 address %s\n",
3144 bind6_address);
3145 plugin->server_addr_v6->sin6_family = AF_INET6;
3146 plugin->server_addr_v6->sin6_port = htons (plugin->port);
3147 }
3148 GNUNET_free (bind6_address);
3149 }
3150
3151 plugin->verify_external_hostname = GNUNET_NO;
3152#if BUILD_HTTPS
3153 plugin->verify_external_hostname
3154 = GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
3155 plugin->name,
3156 "VERIFY_EXTERNAL_HOSTNAME");
3157 if (GNUNET_SYSERR == plugin->verify_external_hostname)
3158 plugin->verify_external_hostname = GNUNET_NO;
3159 if (GNUNET_YES == plugin->verify_external_hostname)
3160 plugin->options |= HTTP_OPTIONS_VERIFY_CERTIFICATE;
3161#endif
3162 external_hostname_use_port
3163 = GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
3164 plugin->name,
3165 "EXTERNAL_HOSTNAME_USE_PORT");
3166 if (GNUNET_SYSERR == external_hostname_use_port)
3167 external_hostname_use_port = GNUNET_NO;
3168
3169
3170 if (GNUNET_YES ==
3171 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg,
3172 plugin->name,
3173 "EXTERNAL_HOSTNAME",
3174 &eh_tmp))
3175 {
3176 char *tmp;
3177 char *pos = NULL;
3178 char *pos_url = NULL;
3179
3180 if (NULL != strstr (eh_tmp, "://"))
3181 tmp = &strstr (eh_tmp, "://")[3];
3182 else
3183 tmp = eh_tmp;
3184
3185 if (GNUNET_YES == external_hostname_use_port)
3186 {
3187 if ((strlen (tmp) > 1) && (NULL != (pos = strchr (tmp, '/'))))
3188 {
3189 pos_url = pos + 1;
3190 pos[0] = '\0';
3191 GNUNET_asprintf (&plugin->external_hostname,
3192 "%s:%u/%s",
3193 tmp,
3194 (uint16_t) port,
3195 pos_url);
3196 }
3197 else
3198 GNUNET_asprintf (&plugin->external_hostname,
3199 "%s:%u",
3200 tmp,
3201 (uint16_t) port);
3202 }
3203 else
3204 plugin->external_hostname = GNUNET_strdup (tmp);
3205 GNUNET_free (eh_tmp);
3206
3207 LOG (GNUNET_ERROR_TYPE_INFO,
3208 _ ("Using external hostname `%s'\n"),
3209 plugin->external_hostname);
3210 plugin->notify_ext_task = GNUNET_SCHEDULER_add_now (
3211 &server_notify_external_hostname,
3212 plugin);
3213
3214 /* Use only configured external hostname */
3215 if (GNUNET_CONFIGURATION_have_value
3216 (plugin->env->cfg,
3217 plugin->name,
3218 "EXTERNAL_HOSTNAME_ONLY"))
3219 {
3220 plugin->external_only =
3221 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
3222 plugin->name,
3223 "EXTERNAL_HOSTNAME_ONLY");
3224 }
3225 else
3226 plugin->external_only = GNUNET_NO;
3227
3228 if (GNUNET_YES == plugin->external_only)
3229 LOG (GNUNET_ERROR_TYPE_DEBUG,
3230 _ ("Notifying transport only about hostname `%s'\n"),
3231 plugin->external_hostname);
3232 }
3233 else
3234 LOG (GNUNET_ERROR_TYPE_DEBUG,
3235 "No external hostname configured\n");
3236
3237 /* Optional parameters */
3238 if (GNUNET_OK !=
3239 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg,
3240 plugin->name,
3241 "MAX_CONNECTIONS",
3242 &max_connections))
3243 max_connections = 128;
3244 plugin->max_request = max_connections;
3245
3246 LOG (GNUNET_ERROR_TYPE_DEBUG,
3247 _ ("Maximum number of connections is %u\n"),
3248 plugin->max_request);
3249
3250 plugin->peer_id_length = strlen (GNUNET_i2s_full (plugin->env->my_identity));
3251
3252 return GNUNET_OK;
3253}
3254
3255
3256/**
3257 * Exit point from the plugin.
3258 *
3259 * @param cls api
3260 * @return NULL
3261 */
3262void *
3263LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
3264{
3265 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
3266 struct HTTP_Server_Plugin *plugin = api->cls;
3267
3268 if (NULL == api->cls)
3269 {
3270 /* Free for stub mode */
3271 GNUNET_free (api);
3272 return NULL;
3273 }
3274 plugin->in_shutdown = GNUNET_YES;
3275 LOG (GNUNET_ERROR_TYPE_INFO,
3276 _ ("Shutting down plugin `%s'\n"),
3277 plugin->name);
3278
3279 if (NULL != plugin->notify_ext_task)
3280 {
3281 GNUNET_SCHEDULER_cancel (plugin->notify_ext_task);
3282 plugin->notify_ext_task = NULL;
3283 }
3284
3285 if (NULL != plugin->ext_addr)
3286 {
3287 LOG (GNUNET_ERROR_TYPE_DEBUG,
3288 "Notifying transport to remove address `%s'\n",
3289 http_common_plugin_address_to_string (plugin->protocol,
3290 plugin->ext_addr->address,
3291 plugin->ext_addr->address_length));
3292#if BUILD_HTTPS
3293 plugin->env->notify_address (plugin->env->cls,
3294 GNUNET_NO,
3295 plugin->ext_addr);
3296#else
3297 plugin->env->notify_address (plugin->env->cls,
3298 GNUNET_NO,
3299 plugin->ext_addr);
3300#endif
3301 GNUNET_HELLO_address_free (plugin->ext_addr);
3302 plugin->ext_addr = NULL;
3303 }
3304
3305 /* Stop to report addresses to transport service */
3306 server_stop_report_addresses (plugin);
3307 if (NULL != plugin->server_v4_task)
3308 {
3309 GNUNET_SCHEDULER_cancel (plugin->server_v4_task);
3310 plugin->server_v4_task = NULL;
3311 }
3312
3313 if (NULL != plugin->server_v6_task)
3314 {
3315 GNUNET_SCHEDULER_cancel (plugin->server_v6_task);
3316 plugin->server_v6_task = NULL;
3317 }
3318#if BUILD_HTTPS
3319 GNUNET_free (plugin->crypto_init);
3320 GNUNET_free (plugin->cert);
3321 GNUNET_free (plugin->key);
3322#endif
3323 GNUNET_CONTAINER_multipeermap_iterate (plugin->sessions,
3324 &destroy_session_shutdown_cb,
3325 plugin);
3326 GNUNET_CONTAINER_multipeermap_destroy (plugin->sessions);
3327 plugin->sessions = NULL;
3328 if (NULL != plugin->server_v4)
3329 {
3330 MHD_stop_daemon (plugin->server_v4);
3331 plugin->server_v4 = NULL;
3332 }
3333 if (NULL != plugin->server_v6)
3334 {
3335 MHD_stop_daemon (plugin->server_v6);
3336 plugin->server_v6 = NULL;
3337 }
3338 /* Clean up */
3339 GNUNET_free (plugin->external_hostname);
3340 GNUNET_free (plugin->ext_addr);
3341 GNUNET_free (plugin->server_addr_v4);
3342 GNUNET_free (plugin->server_addr_v6);
3343 regfree (&plugin->url_regex);
3344
3345 LOG (GNUNET_ERROR_TYPE_DEBUG,
3346 _ ("Shutdown for plugin `%s' complete\n"),
3347 plugin->name);
3348
3349 GNUNET_free (plugin);
3350 GNUNET_free (api);
3351 return NULL;
3352}
3353
3354
3355/**
3356 * Function called for a quick conversion of the binary address to
3357 * a numeric address. Note that the caller must not free the
3358 * address and that the next call to this function is allowed
3359 * to override the address again.
3360 *
3361 * @param cls unused
3362 * @param addr binary address
3363 * @param addrlen length of the address
3364 * @return string representing the same address
3365 */
3366static const char *
3367http_server_plugin_address_to_string (void *cls,
3368 const void *addr,
3369 size_t addrlen)
3370{
3371 return http_common_plugin_address_to_string (PLUGIN_NAME,
3372 addr,
3373 addrlen);
3374}
3375
3376
3377/**
3378 * Function obtain the network type for a session
3379 *
3380 * @param cls closure (`struct HTTP_Server_Plugin *`)
3381 * @param session the session
3382 * @return the network type in HBO or #GNUNET_SYSERR
3383 */
3384static enum GNUNET_NetworkType
3385http_server_plugin_get_network (void *cls,
3386 struct GNUNET_ATS_Session *session)
3387{
3388 return session->scope;
3389}
3390
3391
3392/**
3393 * Function obtain the network type for an address.
3394 *
3395 * @param cls closure (`struct Plugin *`)
3396 * @param address the address
3397 * @return the network type
3398 */
3399static enum GNUNET_NetworkType
3400http_server_plugin_get_network_for_address (void *cls,
3401 const struct
3402 GNUNET_HELLO_Address *address)
3403{
3404 struct HTTP_Server_Plugin *plugin = cls;
3405
3406 return http_common_get_network_for_address (plugin->env,
3407 address);
3408}
3409
3410
3411/**
3412 * Function that will be called whenever the transport service wants to
3413 * notify the plugin that the inbound quota changed and that the plugin
3414 * should update it's delay for the next receive value
3415 *
3416 * @param cls closure
3417 * @param peer which peer was the session for
3418 * @param session which session is being updated
3419 * @param delay new delay to use for receiving
3420 */
3421static void
3422http_server_plugin_update_inbound_delay (void *cls,
3423 const struct GNUNET_PeerIdentity *peer,
3424 struct GNUNET_ATS_Session *session,
3425 struct GNUNET_TIME_Relative delay)
3426{
3427 session->next_receive = GNUNET_TIME_relative_to_absolute (delay);
3428 LOG (GNUNET_ERROR_TYPE_DEBUG,
3429 "New inbound delay %s\n",
3430 GNUNET_STRINGS_relative_time_to_string (delay,
3431 GNUNET_NO));
3432 if (NULL != session->recv_wakeup_task)
3433 {
3434 GNUNET_SCHEDULER_cancel (session->recv_wakeup_task);
3435 session->recv_wakeup_task
3436 = GNUNET_SCHEDULER_add_delayed (delay,
3437 &server_wake_up,
3438 session);
3439 }
3440}
3441
3442
3443/**
3444 * Return information about the given session to the
3445 * monitor callback.
3446 *
3447 * @param cls the `struct Plugin` with the monitor callback (`sic`)
3448 * @param peer peer we send information about
3449 * @param value our `struct GNUNET_ATS_Session` to send information about
3450 * @return #GNUNET_OK (continue to iterate)
3451 */
3452static int
3453send_session_info_iter (void *cls,
3454 const struct GNUNET_PeerIdentity *peer,
3455 void *value)
3456{
3457 struct HTTP_Server_Plugin *plugin = cls;
3458 struct GNUNET_ATS_Session *session = value;
3459
3460 notify_session_monitor (plugin,
3461 session,
3462 GNUNET_TRANSPORT_SS_INIT);
3463 return GNUNET_OK;
3464}
3465
3466
3467/**
3468 * Begin monitoring sessions of a plugin. There can only
3469 * be one active monitor per plugin (i.e. if there are
3470 * multiple monitors, the transport service needs to
3471 * multiplex the generated events over all of them).
3472 *
3473 * @param cls closure of the plugin
3474 * @param sic callback to invoke, NULL to disable monitor;
3475 * plugin will being by iterating over all active
3476 * sessions immediately and then enter monitor mode
3477 * @param sic_cls closure for @a sic
3478 */
3479static void
3480http_server_plugin_setup_monitor (void *cls,
3481 GNUNET_TRANSPORT_SessionInfoCallback sic,
3482 void *sic_cls)
3483{
3484 struct HTTP_Server_Plugin *plugin = cls;
3485
3486 plugin->sic = sic;
3487 plugin->sic_cls = sic_cls;
3488 if (NULL != sic)
3489 {
3490 GNUNET_CONTAINER_multipeermap_iterate (plugin->sessions,
3491 &send_session_info_iter,
3492 plugin);
3493 /* signal end of first iteration */
3494 sic (sic_cls, NULL, NULL);
3495 }
3496}
3497
3498
3499/**
3500 * Entry point for the plugin.
3501 *
3502 * @param cls env
3503 * @return api
3504 */
3505void *
3506LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
3507{
3508 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
3509 struct GNUNET_TRANSPORT_PluginFunctions *api;
3510 struct HTTP_Server_Plugin *plugin;
3511
3512 if (NULL == env->receive)
3513 {
3514 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
3515 initialize the plugin or the API */
3516 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
3517 api->cls = NULL;
3518 api->address_to_string = &http_server_plugin_address_to_string;
3519 api->string_to_address = &http_common_plugin_string_to_address;
3520 api->address_pretty_printer = &http_common_plugin_address_pretty_printer;
3521 return api;
3522 }
3523 plugin = GNUNET_new (struct HTTP_Server_Plugin);
3524 plugin->env = env;
3525 plugin->sessions = GNUNET_CONTAINER_multipeermap_create (128,
3526 GNUNET_YES);
3527
3528 api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
3529 api->cls = plugin;
3530 api->send = &http_server_plugin_send;
3531 api->disconnect_peer = &http_server_plugin_disconnect_peer;
3532 api->disconnect_session = &http_server_plugin_disconnect_session;
3533 api->query_keepalive_factor = &http_server_query_keepalive_factor;
3534 api->check_address = &http_server_plugin_address_suggested;
3535 api->get_session = &http_server_plugin_get_session;
3536
3537 api->address_to_string = &http_server_plugin_address_to_string;
3538 api->string_to_address = &http_common_plugin_string_to_address;
3539 api->address_pretty_printer = &http_common_plugin_address_pretty_printer;
3540 api->get_network = &http_server_plugin_get_network;
3541 api->get_network_for_address = &http_server_plugin_get_network_for_address;
3542 api->update_session_timeout = &http_server_plugin_update_session_timeout;
3543 api->update_inbound_delay = &http_server_plugin_update_inbound_delay;
3544 api->setup_monitor = &http_server_plugin_setup_monitor;
3545#if BUILD_HTTPS
3546 plugin->name = "transport-https_server";
3547 plugin->protocol = "https";
3548#else
3549 plugin->name = "transport-http_server";
3550 plugin->protocol = "http";
3551#endif
3552
3553 if (GNUNET_YES ==
3554 GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
3555 plugin->name,
3556 "TCP_STEALTH"))
3557 {
3558#ifdef TCP_STEALTH
3559 plugin->options |= HTTP_OPTIONS_TCP_STEALTH;
3560#else
3561 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3562 _ ("TCP_STEALTH not supported on this platform.\n"));
3563 LIBGNUNET_PLUGIN_TRANSPORT_DONE (api);
3564 return NULL;
3565#endif
3566 }
3567
3568 /* Compile URL regex */
3569 if (regcomp (&plugin->url_regex,
3570 URL_REGEX,
3571 REG_EXTENDED))
3572 {
3573 LOG (GNUNET_ERROR_TYPE_ERROR,
3574 _ ("Unable to compile URL regex\n"));
3575 LIBGNUNET_PLUGIN_TRANSPORT_DONE (api);
3576 return NULL;
3577 }
3578
3579 /* Configure plugin */
3580 if (GNUNET_SYSERR == server_configure_plugin (plugin))
3581 {
3582 LIBGNUNET_PLUGIN_TRANSPORT_DONE (api);
3583 return NULL;
3584 }
3585
3586 /* Check IPv6 support */
3587 if (GNUNET_YES == plugin->use_ipv6)
3588 plugin->use_ipv6 = server_check_ipv6_support (plugin);
3589
3590 /* Report addresses to transport service */
3591 if (GNUNET_NO == plugin->external_only)
3592 server_start_report_addresses (plugin);
3593
3594 if (GNUNET_SYSERR == server_start (plugin))
3595 {
3596 LIBGNUNET_PLUGIN_TRANSPORT_DONE (api);
3597 return NULL;
3598 }
3599 return api;
3600}
3601
3602
3603/* end of plugin_transport_http_server.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-25 01:33:33 +0000