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diff --git a/src/hostlist/gnunet-daemon-hostlist_server.c b/src/hostlist/gnunet-daemon-hostlist_server.c
deleted file mode 100644
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1/*
2 This file is part of GNUnet.
3 Copyright (C) 2008, 2009, 2010, 2014, 2016 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 hostlist/gnunet-daemon-hostlist_server.c
23 * @author Christian Grothoff
24 * @author Matthias Wachs
25 * @author David Barksdale
26 * @brief application to provide an integrated hostlist HTTP server
27 */
28#include "platform.h"
29#include <microhttpd.h>
30#include "gnunet-daemon-hostlist_server.h"
31#include "gnunet_hello_lib.h"
32#include "gnunet_peerinfo_service.h"
33#include "gnunet-daemon-hostlist.h"
34#include "gnunet_resolver_service.h"
35#include "gnunet_mhd_compat.h"
36
37
38/**
39 * How long until our hostlist advertisement transmission via CORE should
40 * time out?
41 */
42#define GNUNET_ADV_TIMEOUT \
43 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5)
44
45
46/**
47 * Handle to the HTTP server as provided by libmicrohttpd for IPv6.
48 */
49static struct MHD_Daemon *daemon_handle_v6;
50
51/**
52 * Handle to the HTTP server as provided by libmicrohttpd for IPv4.
53 */
54static struct MHD_Daemon *daemon_handle_v4;
55
56/**
57 * Our configuration.
58 */
59static const struct GNUNET_CONFIGURATION_Handle *cfg;
60
61/**
62 * For keeping statistics.
63 */
64static struct GNUNET_STATISTICS_Handle *stats;
65
66/**
67 * Handle to the core service (NULL until we've connected to it).
68 */
69static struct GNUNET_CORE_Handle *core;
70
71/**
72 * Handle to the peerinfo notify service (NULL until we've connected to it).
73 */
74static struct GNUNET_PEERINFO_NotifyContext *notify;
75
76/**
77 * Our primary task for IPv4.
78 */
79static struct GNUNET_SCHEDULER_Task *hostlist_task_v4;
80
81/**
82 * Our primary task for IPv6.
83 */
84static struct GNUNET_SCHEDULER_Task *hostlist_task_v6;
85
86/**
87 * Our canonical response.
88 */
89static struct MHD_Response *response;
90
91/**
92 * Handle for accessing peerinfo service.
93 */
94static struct GNUNET_PEERINFO_Handle *peerinfo;
95
96/**
97 * Set if we are allowed to advertise our hostlist to others.
98 */
99static int advertising;
100
101/**
102 * Buffer for the hostlist address
103 */
104static char *hostlist_uri;
105
106
107/**
108 * Context for #host_processor().
109 */
110struct HostSet
111{
112 /**
113 * Iterator used to build @e data (NULL when done).
114 */
115 struct GNUNET_PEERINFO_IteratorContext *pitr;
116
117 /**
118 * Place where we accumulate all of the HELLO messages.
119 */
120 char *data;
121
122 /**
123 * Number of bytes in @e data.
124 */
125 unsigned int size;
126};
127
128
129/**
130 * NULL if we are not currently iterating over peer information.
131 */
132static struct HostSet *builder;
133
134
135/**
136 * Add headers to a request indicating that we allow Cross-Origin Resource
137 * Sharing.
138 *
139 * @param response response to add headers to
140 */
141static void
142add_cors_headers (struct MHD_Response *response)
143{
144 MHD_add_response_header (response, "Access-Control-Allow-Origin", "*");
145 MHD_add_response_header (response,
146 "Access-Control-Allow-Methods",
147 "GET, OPTIONS");
148 MHD_add_response_header (response, "Access-Control-Max-Age", "86400");
149}
150
151
152/**
153 * Function that assembles our response.
154 */
155static void
156finish_response ()
157{
158 if (NULL != response)
159 MHD_destroy_response (response);
160 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
161 "Creating hostlist response with %u bytes\n",
162 (unsigned int) builder->size);
163 response = MHD_create_response_from_buffer (builder->size,
164 builder->data,
165 MHD_RESPMEM_MUST_FREE);
166 add_cors_headers (response);
167 if ((NULL == daemon_handle_v4) && (NULL == daemon_handle_v6))
168 {
169 MHD_destroy_response (response);
170 response = NULL;
171 }
172 GNUNET_STATISTICS_set (stats,
173 gettext_noop ("bytes in hostlist"),
174 builder->size,
175 GNUNET_YES);
176 GNUNET_free (builder);
177 builder = NULL;
178}
179
180
181/**
182 * Set @a cls to #GNUNET_YES (we have an address!).
183 *
184 * @param cls closure, an `int *`
185 * @param address the address (ignored)
186 * @param expiration expiration time (call is ignored if this is in the past)
187 * @return #GNUNET_SYSERR to stop iterating (unless expiration has occurred)
188 */
189static int
190check_has_addr (void *cls,
191 const struct GNUNET_HELLO_Address *address,
192 struct GNUNET_TIME_Absolute expiration)
193{
194 int *arg = cls;
195
196 if (0 == GNUNET_TIME_absolute_get_remaining (expiration).rel_value_us)
197 {
198 GNUNET_STATISTICS_update (stats,
199 gettext_noop ("expired addresses encountered"),
200 1,
201 GNUNET_YES);
202 return GNUNET_YES; /* ignore this address */
203 }
204 *arg = GNUNET_YES;
205 return GNUNET_SYSERR;
206}
207
208
209/**
210 * Callback that processes each of the known HELLOs for the
211 * hostlist response construction.
212 *
213 * @param cls closure, NULL
214 * @param peer id of the peer, NULL for last call
215 * @param hello hello message for the peer (can be NULL)
216 * @param err_msg message
217 */
218static void
219host_processor (void *cls,
220 const struct GNUNET_PeerIdentity *peer,
221 const struct GNUNET_HELLO_Message *hello,
222 const char *err_msg)
223{
224 size_t old;
225 size_t s;
226 int has_addr;
227
228 if (NULL != err_msg)
229 {
230 GNUNET_assert (NULL == peer);
231 builder->pitr = NULL;
232 GNUNET_free (builder->data);
233 GNUNET_free (builder);
234 builder = NULL;
235 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
236 _ ("Error in communication with PEERINFO service: %s\n"),
237 err_msg);
238 return;
239 }
240 if (NULL == peer)
241 {
242 builder->pitr = NULL;
243 finish_response ();
244 return;
245 }
246 if (NULL == hello)
247 return;
248 has_addr = GNUNET_NO;
249 GNUNET_HELLO_iterate_addresses (hello, GNUNET_NO, &check_has_addr, &has_addr);
250 if (GNUNET_NO == has_addr)
251 {
252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
253 "HELLO for peer `%4s' has no address, not suitable for hostlist!\n",
254 GNUNET_i2s (peer));
255 GNUNET_STATISTICS_update (stats,
256 gettext_noop (
257 "HELLOs without addresses encountered (ignored)"),
258 1,
259 GNUNET_NO);
260 return;
261 }
262 old = builder->size;
263 s = GNUNET_HELLO_size (hello);
264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
265 "Received %u bytes of `%s' from peer `%s' for hostlist.\n",
266 (unsigned int) s,
267 "HELLO",
268 GNUNET_i2s (peer));
269 if ((old + s >= GNUNET_MAX_MALLOC_CHECKED) ||
270 (old + s >= MAX_BYTES_PER_HOSTLISTS))
271 {
272 /* too large, skip! */
273 GNUNET_STATISTICS_update (stats,
274 gettext_noop (
275 "bytes not included in hostlist (size limit)"),
276 s,
277 GNUNET_NO);
278 return;
279 }
280 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
281 "Adding peer `%s' to hostlist (%u bytes)\n",
282 GNUNET_i2s (peer),
283 (unsigned int) s);
284 GNUNET_array_grow (builder->data, builder->size, old + s);
285 GNUNET_memcpy (&builder->data[old], hello, s);
286}
287
288
289/**
290 * Hostlist access policy (very permissive, allows everything).
291 * Returns #MHD_NO only if we are not yet ready to serve.
292 *
293 * @param cls closure
294 * @param addr address information from the client
295 * @param addrlen length of @a addr
296 * @return #MHD_YES if connection is allowed, #MHD_NO if not (we are not ready)
297 */
298static MHD_RESULT
299accept_policy_callback (void *cls,
300 const struct sockaddr *addr,
301 socklen_t addrlen)
302{
303 if (NULL == response)
304 {
305 GNUNET_log (
306 GNUNET_ERROR_TYPE_DEBUG,
307 "Received request for hostlist, but I am not yet ready; rejecting!\n");
308 return MHD_NO;
309 }
310 return MHD_YES; /* accept all */
311}
312
313
314/**
315 * Main request handler.
316 *
317 * @param cls argument given together with the function
318 * pointer when the handler was registered with MHD
319 * @param connection
320 * @param url the requested url
321 * @param method the HTTP method used (#MHD_HTTP_METHOD_GET,
322 * #MHD_HTTP_METHOD_PUT, etc.)
323 * @param version the HTTP version string (e.g.
324 * #MHD_HTTP_VERSION_1_1)
325 * @param upload_data the data being uploaded (excluding HEADERS,
326 * for a POST that fits into memory and that is encoded
327 * with a supported encoding, the POST data will NOT be
328 * given in upload_data and is instead available as
329 * part of #MHD_get_connection_values; very large POST
330 * data *will* be made available incrementally in
331 * @a upload_data)
332 * @param upload_data_size set initially to the size of the
333 * @a upload_data provided; the method must update this
334 * value to the number of bytes NOT processed;
335 * @param con_cls pointer that the callback can set to some
336 * address and that will be preserved by MHD for future
337 * calls for this request; since the access handler may
338 * be called many times (e.g. for a PUT/POST operation
339 * with plenty of upload data) this allows the application
340 * to easily associate some request-specific state.
341 * If necessary, this state can be cleaned up in the
342 * global #MHD_RequestCompletedCallback (which
343 * can be set with the #MHD_OPTION_NOTIFY_COMPLETED).
344 * Initially, `*con_cls` will be NULL.
345 * @return #MHD_YES if the connection was handled successfully,
346 * #MHD_NO if the socket must be closed due to a serious
347 * error while handling the request
348 */
349static MHD_RESULT
350access_handler_callback (void *cls,
351 struct MHD_Connection *connection,
352 const char *url,
353 const char *method,
354 const char *version,
355 const char *upload_data,
356 size_t *upload_data_size,
357 void **con_cls)
358{
359 static int dummy;
360
361 /* CORS pre-flight request */
362 if (0 == strcmp (MHD_HTTP_METHOD_OPTIONS, method))
363 {
364 struct MHD_Response *options_response;
365 int rc;
366
367 options_response =
368 MHD_create_response_from_buffer (0, NULL, MHD_RESPMEM_PERSISTENT);
369 add_cors_headers (options_response);
370 rc = MHD_queue_response (connection, MHD_HTTP_OK, options_response);
371 MHD_destroy_response (options_response);
372 return rc;
373 }
374 if (0 != strcmp (method, MHD_HTTP_METHOD_GET))
375 {
376 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
377 _ ("Refusing `%s' request to hostlist server\n"),
378 method);
379 GNUNET_STATISTICS_update (stats,
380 gettext_noop (
381 "hostlist requests refused (not HTTP GET)"),
382 1,
383 GNUNET_YES);
384 return MHD_NO;
385 }
386 if (NULL == *con_cls)
387 {
388 (*con_cls) = &dummy;
389 return MHD_YES;
390 }
391 if (0 != *upload_data_size)
392 {
393 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
394 _ ("Refusing `%s' request with %llu bytes of upload data\n"),
395 method,
396 (unsigned long long) *upload_data_size);
397 GNUNET_STATISTICS_update (stats,
398 gettext_noop (
399 "hostlist requests refused (upload data)"),
400 1,
401 GNUNET_YES);
402 return MHD_NO; /* do not support upload data */
403 }
404 if (NULL == response)
405 {
406 GNUNET_log (
407 GNUNET_ERROR_TYPE_WARNING,
408 _ (
409 "Could not handle hostlist request since I do not have a response yet\n"));
410 GNUNET_STATISTICS_update (stats,
411 gettext_noop (
412 "hostlist requests refused (not ready)"),
413 1,
414 GNUNET_YES);
415 return MHD_NO; /* internal error, no response yet */
416 }
417 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
418 _ ("Received request for our hostlist\n"));
419 GNUNET_STATISTICS_update (stats,
420 gettext_noop ("hostlist requests processed"),
421 1,
422 GNUNET_YES);
423 return MHD_queue_response (connection, MHD_HTTP_OK, response);
424}
425
426
427/**
428 * Handler called by CORE when CORE is ready to transmit message
429 *
430 * @param cls closure with the `const struct GNUNET_PeerIdentity *` of
431 * the peer we are sending to
432 * @param size size of buffer to copy message to
433 * @param buf buffer to copy message to
434 * @return number of bytes copied to @a buf
435 */
436static void
437adv_transmit (struct GNUNET_MQ_Handle *mq)
438{
439 static uint64_t hostlist_adv_count;
440 size_t uri_size; /* Including \0 termination! */
441 struct GNUNET_MessageHeader *header;
442 struct GNUNET_MQ_Envelope *env;
443
444 uri_size = strlen (hostlist_uri) + 1;
445 env = GNUNET_MQ_msg_extra (header,
446 uri_size,
447 GNUNET_MESSAGE_TYPE_HOSTLIST_ADVERTISEMENT);
448 GNUNET_memcpy (&header[1], hostlist_uri, uri_size);
449 GNUNET_MQ_env_set_options (env,
450 GNUNET_MQ_PREF_CORK_ALLOWED
451 | GNUNET_MQ_PREF_UNRELIABLE);
452 GNUNET_MQ_send (mq, env);
453 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
454 "Sent advertisement message: Copied %u bytes into buffer!\n",
455 (unsigned int) uri_size);
456 hostlist_adv_count++;
457 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
458 " # Sent advertisement message: %llu\n",
459 (unsigned long long) hostlist_adv_count);
460 GNUNET_STATISTICS_update (stats,
461 gettext_noop ("# hostlist advertisements send"),
462 1,
463 GNUNET_NO);
464}
465
466
467/**
468 * Method called whenever a given peer connects.
469 *
470 * @param cls closure
471 * @param peer peer identity this notification is about
472 * @param mq queue for transmission to @a peer
473 * @return NULL (must!)
474 */
475static void *
476connect_handler (void *cls,
477 const struct GNUNET_PeerIdentity *peer,
478 struct GNUNET_MQ_Handle *mq)
479{
480 size_t size;
481
482 if (! advertising)
483 return NULL;
484 if (NULL == hostlist_uri)
485 return NULL;
486 size = strlen (hostlist_uri) + 1;
487 if (size + sizeof(struct GNUNET_MessageHeader) >= GNUNET_MAX_MESSAGE_SIZE)
488 {
489 GNUNET_break (0);
490 return NULL;
491 }
492 size += sizeof(struct GNUNET_MessageHeader);
493 if (NULL == core)
494 {
495 GNUNET_break (0);
496 return NULL;
497 }
498 GNUNET_log (
499 GNUNET_ERROR_TYPE_DEBUG,
500 "Asked CORE to transmit advertisement message with a size of %u bytes to peer `%s'\n",
501 (unsigned int) size,
502 GNUNET_i2s (peer));
503 adv_transmit (mq);
504 return NULL;
505}
506
507
508/**
509 * PEERINFO calls this function to let us know about a possible peer
510 * that we might want to connect to.
511 *
512 * @param cls closure (not used)
513 * @param peer potential peer to connect to
514 * @param hello HELLO for this peer (or NULL)
515 * @param err_msg NULL if successful, otherwise contains error message
516 */
517static void
518process_notify (void *cls,
519 const struct GNUNET_PeerIdentity *peer,
520 const struct GNUNET_HELLO_Message *hello,
521 const char *err_msg)
522{
523 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
524 "Peerinfo is notifying us to rebuild our hostlist\n");
525 if (NULL != err_msg)
526 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
527 _ ("Error in communication with PEERINFO service: %s\n"),
528 err_msg);
529 if (NULL != builder)
530 {
531 /* restart re-build already in progress ... */
532 if (NULL != builder->pitr)
533 {
534 GNUNET_PEERINFO_iterate_cancel (builder->pitr);
535 builder->pitr = NULL;
536 }
537 GNUNET_free (builder->data);
538 builder->size = 0;
539 builder->data = NULL;
540 }
541 else
542 {
543 builder = GNUNET_new (struct HostSet);
544 }
545 GNUNET_assert (NULL != peerinfo);
546 builder->pitr =
547 GNUNET_PEERINFO_iterate (peerinfo, GNUNET_NO, NULL, &host_processor, NULL);
548}
549
550
551/**
552 * Function that queries MHD's select sets and
553 * starts the task waiting for them.
554 */
555static struct GNUNET_SCHEDULER_Task *
556prepare_daemon (struct MHD_Daemon *daemon_handle);
557
558
559/**
560 * Call MHD to process pending requests and then go back
561 * and schedule the next run.
562 *
563 * @param cls the `struct MHD_Daemon` of the HTTP server to run
564 */
565static void
566run_daemon (void *cls)
567{
568 struct MHD_Daemon *daemon_handle = cls;
569
570 if (daemon_handle == daemon_handle_v4)
571 hostlist_task_v4 = NULL;
572 else
573 hostlist_task_v6 = NULL;
574 GNUNET_assert (MHD_YES == MHD_run (daemon_handle));
575 if (daemon_handle == daemon_handle_v4)
576 hostlist_task_v4 = prepare_daemon (daemon_handle);
577 else
578 hostlist_task_v6 = prepare_daemon (daemon_handle);
579}
580
581
582/**
583 * Function that queries MHD's select sets and
584 * starts the task waiting for them.
585 *
586 * @param daemon_handle HTTP server to prepare to run
587 */
588static struct GNUNET_SCHEDULER_Task *
589prepare_daemon (struct MHD_Daemon *daemon_handle)
590{
591 struct GNUNET_SCHEDULER_Task *ret;
592 fd_set rs;
593 fd_set ws;
594 fd_set es;
595 struct GNUNET_NETWORK_FDSet *wrs;
596 struct GNUNET_NETWORK_FDSet *wws;
597 int max;
598 MHD_UNSIGNED_LONG_LONG timeout;
599 int haveto;
600 struct GNUNET_TIME_Relative tv;
601
602 FD_ZERO (&rs);
603 FD_ZERO (&ws);
604 FD_ZERO (&es);
605 wrs = GNUNET_NETWORK_fdset_create ();
606 wws = GNUNET_NETWORK_fdset_create ();
607 max = -1;
608 GNUNET_assert (MHD_YES == MHD_get_fdset (daemon_handle, &rs, &ws, &es, &max));
609 haveto = MHD_get_timeout (daemon_handle, &timeout);
610 if (haveto == MHD_YES)
611 tv.rel_value_us = (uint64_t) timeout * 1000LL;
612 else
613 tv = GNUNET_TIME_UNIT_FOREVER_REL;
614 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max + 1);
615 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max + 1);
616 ret = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH,
617 tv,
618 wrs,
619 wws,
620 &run_daemon,
621 daemon_handle);
622 GNUNET_NETWORK_fdset_destroy (wrs);
623 GNUNET_NETWORK_fdset_destroy (wws);
624 return ret;
625}
626
627
628/**
629 * Start server offering our hostlist.
630 *
631 * @param c configuration to use
632 * @param st statistics handle to use
633 * @param co core handle to use
634 * @param[out] server_ch set to handler for CORE connect events
635 * @param advertise #GNUNET_YES if we should advertise our hostlist
636 * @return #GNUNET_OK on success
637 */
638int
639GNUNET_HOSTLIST_server_start (const struct GNUNET_CONFIGURATION_Handle *c,
640 struct GNUNET_STATISTICS_Handle *st,
641 struct GNUNET_CORE_Handle *co,
642 GNUNET_CORE_ConnectEventHandler *server_ch,
643 int advertise)
644{
645 unsigned long long port;
646 char *hostname;
647 char *ipv4;
648 char *ipv6;
649 size_t size;
650 struct in_addr i4;
651 struct in6_addr i6;
652 struct sockaddr_in v4;
653 struct sockaddr_in6 v6;
654 const struct sockaddr *sa4;
655 const struct sockaddr *sa6;
656
657 advertising = advertise;
658 if (! advertising)
659 {
660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
661 "Advertising not enabled on this hostlist server\n");
662 }
663 else
664 {
665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
666 "Advertising enabled on this hostlist server\n");
667 }
668 cfg = c;
669 stats = st;
670 peerinfo = GNUNET_PEERINFO_connect (cfg);
671 if (NULL == peerinfo)
672 {
673 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
674 _ ("Could not access PEERINFO service. Exiting.\n"));
675 return GNUNET_SYSERR;
676 }
677 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg,
678 "HOSTLIST",
679 "HTTPPORT",
680 &port))
681 return GNUNET_SYSERR;
682 if ((0 == port) || (port > UINT16_MAX))
683 {
684 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
685 _ ("Invalid port number %llu. Exiting.\n"),
686 port);
687 return GNUNET_SYSERR;
688 }
689
690 if (GNUNET_SYSERR ==
691 GNUNET_CONFIGURATION_get_value_string (cfg,
692 "HOSTLIST",
693 "EXTERNAL_DNS_NAME",
694 &hostname))
695 hostname = GNUNET_RESOLVER_local_fqdn_get ();
696 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
697 _ ("Hostlist service starts on %s:%llu\n"),
698 hostname,
699 port);
700 if (NULL != hostname)
701 {
702 size = strlen (hostname);
703 if (size + 15 > MAX_URL_LEN)
704 {
705 GNUNET_break (0);
706 }
707 else
708 {
709 GNUNET_asprintf (&hostlist_uri,
710 "http://%s:%u/",
711 hostname,
712 (unsigned int) port);
713 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
714 _ ("Address to obtain hostlist: `%s'\n"),
715 hostlist_uri);
716 }
717 GNUNET_free (hostname);
718 }
719
720 if (GNUNET_CONFIGURATION_have_value (cfg, "HOSTLIST", "BINDTOIPV4"))
721 {
722 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (cfg,
723 "HOSTLIST",
724 "BINDTOIP",
725 &ipv4))
726 {
727 GNUNET_log (
728 GNUNET_ERROR_TYPE_WARNING,
729 _ ("BINDTOIP does not a valid IPv4 address! Ignoring BINDTOIPV4.\n"));
730 }
731 }
732 else
733 ipv4 = NULL;
734 if (GNUNET_CONFIGURATION_have_value (cfg, "HOSTLIST", "BINDTOIPV6"))
735 {
736 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (cfg,
737 "HOSTLIST",
738 "BINDTOIP",
739 &ipv6))
740 {
741 GNUNET_log (
742 GNUNET_ERROR_TYPE_WARNING,
743 _ ("BINDTOIP does not a valid IPv4 address! Ignoring BINDTOIPV6.\n"));
744 }
745 }
746 else
747 ipv6 = NULL;
748 sa4 = NULL;
749 if (NULL != ipv4)
750 {
751 if (1 == inet_pton (AF_INET, ipv4, &i4))
752 {
753 memset (&v4, 0, sizeof(v4));
754 v4.sin_family = AF_INET;
755 v4.sin_addr = i4;
756 v4.sin_port = htons (port);
757#if HAVE_SOCKADDR_IN_SIN_LEN
758 v4.sin_len = sizeof(v4);
759#endif
760 sa4 = (const struct sockaddr *) &v4;
761 }
762 else
763 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
764 _ (
765 "`%s' is not a valid IPv4 address! Ignoring BINDTOIPV4.\n"),
766 ipv4);
767 GNUNET_free (ipv4);
768 }
769 sa6 = NULL;
770 if (NULL != ipv6)
771 {
772 if (1 == inet_pton (AF_INET6, ipv6, &i6))
773 {
774 memset (&v6, 0, sizeof(v6));
775 v6.sin6_family = AF_INET6;
776 v6.sin6_addr = i6;
777 v6.sin6_port = htons (port);
778#if HAVE_SOCKADDR_IN_SIN_LEN
779 v6.sin6_len = sizeof(v6);
780#endif
781 sa6 = (const struct sockaddr *) &v6;
782 }
783 else
784 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
785 _ (
786 "`%s' is not a valid IPv6 address! Ignoring BINDTOIPV6.\n"),
787 ipv6);
788 GNUNET_free (ipv6);
789 }
790
791 daemon_handle_v6 = MHD_start_daemon (MHD_USE_IPv6 | MHD_USE_DEBUG,
792 (uint16_t) port,
793 &accept_policy_callback,
794 NULL,
795 &access_handler_callback,
796 NULL,
797 MHD_OPTION_CONNECTION_LIMIT,
798 (unsigned int) 128,
799 MHD_OPTION_PER_IP_CONNECTION_LIMIT,
800 (unsigned int) 32,
801 MHD_OPTION_CONNECTION_TIMEOUT,
802 (unsigned int) 16,
803 MHD_OPTION_CONNECTION_MEMORY_LIMIT,
804 (size_t) (16 * 1024),
805 MHD_OPTION_SOCK_ADDR,
806 sa6,
807 MHD_OPTION_END);
808 daemon_handle_v4 = MHD_start_daemon (MHD_NO_FLAG | MHD_USE_DEBUG,
809 (uint16_t) port,
810 &accept_policy_callback,
811 NULL,
812 &access_handler_callback,
813 NULL,
814 MHD_OPTION_CONNECTION_LIMIT,
815 (unsigned int) 128,
816 MHD_OPTION_PER_IP_CONNECTION_LIMIT,
817 (unsigned int) 32,
818 MHD_OPTION_CONNECTION_TIMEOUT,
819 (unsigned int) 16,
820 MHD_OPTION_CONNECTION_MEMORY_LIMIT,
821 (size_t) (16 * 1024),
822 MHD_OPTION_SOCK_ADDR,
823 sa4,
824 MHD_OPTION_END);
825
826 if ((NULL == daemon_handle_v6) && (NULL == daemon_handle_v4))
827 {
828 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
829 _ ("Could not start hostlist HTTP server on port %u\n"),
830 (unsigned short) port);
831 return GNUNET_SYSERR;
832 }
833
834 core = co;
835 *server_ch = &connect_handler;
836 if (NULL != daemon_handle_v4)
837 hostlist_task_v4 = prepare_daemon (daemon_handle_v4);
838 if (NULL != daemon_handle_v6)
839 hostlist_task_v6 = prepare_daemon (daemon_handle_v6);
840 notify = GNUNET_PEERINFO_notify (cfg, GNUNET_NO, &process_notify, NULL);
841 return GNUNET_OK;
842}
843
844
845/**
846 * Stop server offering our hostlist.
847 */
848void
849GNUNET_HOSTLIST_server_stop ()
850{
851 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Hostlist server shutdown\n");
852 if (NULL != hostlist_task_v6)
853 {
854 GNUNET_SCHEDULER_cancel (hostlist_task_v6);
855 hostlist_task_v6 = NULL;
856 }
857 if (NULL != hostlist_task_v4)
858 {
859 GNUNET_SCHEDULER_cancel (hostlist_task_v4);
860 hostlist_task_v4 = NULL;
861 }
862 if (NULL != daemon_handle_v4)
863 {
864 MHD_stop_daemon (daemon_handle_v4);
865 daemon_handle_v4 = NULL;
866 }
867 if (NULL != daemon_handle_v6)
868 {
869 MHD_stop_daemon (daemon_handle_v6);
870 daemon_handle_v6 = NULL;
871 }
872 if (NULL != response)
873 {
874 MHD_destroy_response (response);
875 response = NULL;
876 }
877 if (NULL != notify)
878 {
879 GNUNET_PEERINFO_notify_cancel (notify);
880 notify = NULL;
881 }
882 if (NULL != builder)
883 {
884 if (NULL != builder->pitr)
885 {
886 GNUNET_PEERINFO_iterate_cancel (builder->pitr);
887 builder->pitr = NULL;
888 }
889 GNUNET_free (builder->data);
890 GNUNET_free (builder);
891 builder = NULL;
892 }
893 if (NULL != peerinfo)
894 {
895 GNUNET_PEERINFO_disconnect (peerinfo);
896 peerinfo = NULL;
897 }
898 cfg = NULL;
899 stats = NULL;
900 core = NULL;
901}
902
903
904/* end of gnunet-daemon-hostlist_server.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-26 02:24:48 +0000