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1/*
2 This file is part of GNUnet.
3 (C) 2009 Christian Grothoff (and other contributing authors)
4
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 2, or (at your
8 option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
19*/
20
21/**
22 * @file util/service.c
23 * @brief functions related to starting services
24 * @author Christian Grothoff
25 */
26#include "platform.h"
27#include "gnunet_common.h"
28#include "gnunet_configuration_lib.h"
29#include "gnunet_crypto_lib.h"
30#include "gnunet_directories.h"
31#include "gnunet_disk_lib.h"
32#include "gnunet_getopt_lib.h"
33#include "gnunet_os_lib.h"
34#include "gnunet_protocols.h"
35#include "gnunet_server_lib.h"
36#include "gnunet_service_lib.h"
37
38/* ******************* access control ******************** */
39
40/**
41 * @brief IPV4 network in CIDR notation.
42 */
43struct IPv4NetworkSet
44{
45 struct in_addr network;
46 struct in_addr netmask;
47};
48
49/**
50 * @brief network in CIDR notation for IPV6.
51 */
52struct IPv6NetworkSet
53{
54 struct in6_addr network;
55 struct in6_addr netmask;
56};
57
58
59/**
60 * Parse a network specification. The argument specifies
61 * a list of networks. The format is
62 * <tt>[network/netmask;]*</tt> (no whitespace, must be terminated
63 * with a semicolon). The network must be given in dotted-decimal
64 * notation. The netmask can be given in CIDR notation (/16) or
65 * in dotted-decimal (/255.255.0.0).
66 * <p>
67 * @param routeList a string specifying the forbidden networks
68 * @return the converted list, NULL if the synatx is flawed
69 */
70static struct IPv4NetworkSet *
71parse_ipv4_specification (const char *routeList)
72{
73 unsigned int count;
74 unsigned int i;
75 unsigned int j;
76 unsigned int len;
77 int cnt;
78 unsigned int pos;
79 unsigned int temps[8];
80 int slash;
81 struct IPv4NetworkSet *result;
82
83 if (routeList == NULL)
84 return NULL;
85 len = strlen (routeList);
86 if (len == 0)
87 return NULL;
88 count = 0;
89 for (i = 0; i < len; i++)
90 if (routeList[i] == ';')
91 count++;
92 result = GNUNET_malloc (sizeof (struct IPv4NetworkSet) * (count + 1));
93 /* add termination */
94 memset (result, 0, sizeof (struct IPv4NetworkSet) * (count + 1));
95 i = 0;
96 pos = 0;
97 while (i < count)
98 {
99 cnt = sscanf (&routeList[pos],
100 "%u.%u.%u.%u/%u.%u.%u.%u;",
101 &temps[0],
102 &temps[1],
103 &temps[2],
104 &temps[3], &temps[4], &temps[5], &temps[6], &temps[7]);
105 if (cnt == 8)
106 {
107 for (j = 0; j < 8; j++)
108 if (temps[j] > 0xFF)
109 {
110 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
111 _("Invalid format for IP: `%s'\n"),
112 &routeList[pos]);
113 GNUNET_free (result);
114 return NULL;
115 }
116 result[i].network.s_addr
117 =
118 htonl ((temps[0] << 24) + (temps[1] << 16) + (temps[2] << 8) +
119 temps[3]);
120 result[i].netmask.s_addr =
121 htonl ((temps[4] << 24) + (temps[5] << 16) + (temps[6] << 8) +
122 temps[7]);
123 while (routeList[pos] != ';')
124 pos++;
125 pos++;
126 i++;
127 continue;
128 }
129 /* try second notation */
130 cnt = sscanf (&routeList[pos],
131 "%u.%u.%u.%u/%u;",
132 &temps[0], &temps[1], &temps[2], &temps[3], &slash);
133 if (cnt == 5)
134 {
135 for (j = 0; j < 4; j++)
136 if (temps[j] > 0xFF)
137 {
138 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
139 _("Invalid format for IP: `%s'\n"),
140 &routeList[pos]);
141 GNUNET_free (result);
142 return NULL;
143 }
144 result[i].network.s_addr
145 =
146 htonl ((temps[0] << 24) + (temps[1] << 16) + (temps[2] << 8) +
147 temps[3]);
148 if ((slash <= 32) && (slash >= 0))
149 {
150 result[i].netmask.s_addr = 0;
151 while (slash > 0)
152 {
153 result[i].netmask.s_addr
154 = (result[i].netmask.s_addr >> 1) + 0x80000000;
155 slash--;
156 }
157 result[i].netmask.s_addr = htonl (result[i].netmask.s_addr);
158 while (routeList[pos] != ';')
159 pos++;
160 pos++;
161 i++;
162 continue;
163 }
164 else
165 {
166 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
167 _
168 ("Invalid network notation ('/%d' is not legal in IPv4 CIDR)."),
169 slash);
170 GNUNET_free (result);
171 return NULL; /* error */
172 }
173 }
174 /* try third notation */
175 slash = 32;
176 cnt = sscanf (&routeList[pos],
177 "%u.%u.%u.%u;",
178 &temps[0], &temps[1], &temps[2], &temps[3]);
179 if (cnt == 4)
180 {
181 for (j = 0; j < 4; j++)
182 if (temps[j] > 0xFF)
183 {
184 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
185 _("Invalid format for IP: `%s'\n"),
186 &routeList[pos]);
187 GNUNET_free (result);
188 return NULL;
189 }
190 result[i].network.s_addr
191 =
192 htonl ((temps[0] << 24) + (temps[1] << 16) + (temps[2] << 8) +
193 temps[3]);
194 result[i].netmask.s_addr = 0;
195 while (slash > 0)
196 {
197 result[i].netmask.s_addr
198 = (result[i].netmask.s_addr >> 1) + 0x80000000;
199 slash--;
200 }
201 result[i].netmask.s_addr = htonl (result[i].netmask.s_addr);
202 while (routeList[pos] != ';')
203 pos++;
204 pos++;
205 i++;
206 continue;
207 }
208 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
209 _("Invalid format for IP: `%s'\n"), &routeList[pos]);
210 GNUNET_free (result);
211 return NULL; /* error */
212 }
213 if (pos < strlen (routeList))
214 {
215 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
216 _("Invalid format for IP: `%s'\n"), &routeList[pos]);
217 GNUNET_free (result);
218 return NULL; /* oops */
219 }
220 return result; /* ok */
221}
222
223
224/**
225 * Parse a network specification. The argument specifies
226 * a list of networks. The format is
227 * <tt>[network/netmask;]*</tt> (no whitespace, must be terminated
228 * with a semicolon). The network must be given in colon-hex
229 * notation. The netmask must be given in CIDR notation (/16) or
230 * can be omitted to specify a single host.
231 * <p>
232 * @param routeList a string specifying the forbidden networks
233 * @return the converted list, NULL if the synatx is flawed
234 */
235static struct IPv6NetworkSet *
236parse_ipv6_specification (const char *routeListX)
237{
238 unsigned int count;
239 unsigned int i;
240 unsigned int len;
241 unsigned int pos;
242 int start;
243 int slash;
244 int ret;
245 char *routeList;
246 struct IPv6NetworkSet *result;
247 unsigned int bits;
248 unsigned int off;
249 int save;
250
251 if (routeListX == NULL)
252 return NULL;
253 len = strlen (routeListX);
254 if (len == 0)
255 return NULL;
256 routeList = GNUNET_strdup (routeListX);
257 count = 0;
258 for (i = 0; i < len; i++)
259 if (routeList[i] == ';')
260 count++;
261 if (routeList[len - 1] != ';')
262 {
263 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
264 _
265 ("Invalid network notation (does not end with ';': `%s')\n"),
266 routeList);
267 GNUNET_free (routeList);
268 return NULL;
269 }
270
271 result = GNUNET_malloc (sizeof (struct IPv6NetworkSet) * (count + 1));
272 memset (result, 0, sizeof (struct IPv6NetworkSet) * (count + 1));
273 i = 0;
274 pos = 0;
275 while (i < count)
276 {
277 start = pos;
278 while (routeList[pos] != ';')
279 pos++;
280 slash = pos;
281 while ((slash >= start) && (routeList[slash] != '/'))
282 slash--;
283 if (slash < start)
284 {
285 memset (&result[i].netmask, 0xFF, sizeof (struct in6_addr));
286 slash = pos;
287 }
288 else
289 {
290 routeList[pos] = '\0';
291 ret = inet_pton (AF_INET6,
292 &routeList[slash + 1], &result[i].netmask);
293 if (ret <= 0)
294 {
295 save = errno;
296 if ((1 != SSCANF (&routeList[slash + 1],
297 "%u", &bits)) || (bits >= 128))
298 {
299 if (ret == 0)
300 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
301 _("Wrong format `%s' for netmask\n"),
302 &routeList[slash + 1]);
303 else
304 {
305 errno = save;
306 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
307 "inet_pton");
308 }
309 GNUNET_free (result);
310 GNUNET_free (routeList);
311 return NULL;
312 }
313 off = 0;
314 while (bits > 8)
315 {
316 result[i].netmask.s6_addr[off++] = 0xFF;
317 bits -= 8;
318 }
319 while (bits > 0)
320 {
321 result[i].netmask.s6_addr[off]
322 = (result[i].netmask.s6_addr[off] >> 1) + 0x80;
323 bits--;
324 }
325 }
326 }
327 routeList[slash] = '\0';
328 ret = inet_pton (AF_INET6, &routeList[start], &result[i].network);
329 if (ret <= 0)
330 {
331 if (ret == 0)
332 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
333 _("Wrong format `%s' for network\n"),
334 &routeList[slash + 1]);
335 else
336 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "inet_pton");
337 GNUNET_free (result);
338 GNUNET_free (routeList);
339 return NULL;
340 }
341 pos++;
342 i++;
343 }
344 GNUNET_free (routeList);
345 return result;
346}
347
348
349/**
350 * Check if the given IP address is in the list of IP addresses.
351 *
352 * @param list a list of networks
353 * @param ip the IP to check (in network byte order)
354 * @return GNUNET_NO if the IP is not in the list, GNUNET_YES if it it is
355 */
356static int
357check_ipv4_listed (const struct IPv4NetworkSet *list,
358 const struct in_addr *add)
359{
360 int i;
361
362 i = 0;
363 if (list == NULL)
364 return GNUNET_NO;
365
366 while ((list[i].network.s_addr != 0) || (list[i].netmask.s_addr != 0))
367 {
368 if ((add->s_addr & list[i].netmask.s_addr) ==
369 (list[i].network.s_addr & list[i].netmask.s_addr))
370 return GNUNET_YES;
371 i++;
372 }
373 return GNUNET_NO;
374}
375
376/**
377 * Check if the given IP address is in the list of IP addresses.
378 *
379 * @param list a list of networks
380 * @param ip the IP to check (in network byte order)
381 * @return GNUNET_NO if the IP is not in the list, GNUNET_YES if it it is
382 */
383static int
384check_ipv6_listed (const struct IPv6NetworkSet *list,
385 const struct in6_addr *ip)
386{
387 unsigned int i;
388 unsigned int j;
389 struct in6_addr zero;
390
391 if (list == NULL)
392 return GNUNET_NO;
393
394 memset (&zero, 0, sizeof (struct in6_addr));
395 i = 0;
396NEXT:
397 while (memcmp (&zero, &list[i].network, sizeof (struct in6_addr)) != 0)
398 {
399 for (j = 0; j < sizeof (struct in6_addr) / sizeof (int); j++)
400 if (((((int *) ip)[j] & ((int *) &list[i].netmask)[j])) !=
401 (((int *) &list[i].network)[j] & ((int *) &list[i].netmask)[j]))
402 {
403 i++;
404 goto NEXT;
405 }
406 return GNUNET_YES;
407 }
408 return GNUNET_NO;
409}
410
411
412/* ****************** service struct ****************** */
413
414
415/**
416 * Context for "service_task".
417 */
418struct GNUNET_SERVICE_Context
419{
420 /**
421 * Our configuration.
422 */
423 struct GNUNET_CONFIGURATION_Handle *cfg;
424
425 /**
426 * Handle for the server.
427 */
428 struct GNUNET_SERVER_Handle *server;
429
430 /**
431 * Scheduler for the server.
432 */
433 struct GNUNET_SCHEDULER_Handle *sched;
434
435 /**
436 * Address to bind to.
437 */
438 struct sockaddr *addr;
439
440 /**
441 * Name of our service.
442 */
443 const char *serviceName;
444
445 /**
446 * Main service-specific task to run.
447 */
448 GNUNET_SERVICE_Main task;
449
450 /**
451 * Closure for task.
452 */
453 void *task_cls;
454
455 /**
456 * IPv4 addresses that are not allowed to connect.
457 */
458 struct IPv4NetworkSet *v4_denied;
459
460 /**
461 * IPv6 addresses that are not allowed to connect.
462 */
463 struct IPv6NetworkSet *v6_denied;
464
465 /**
466 * IPv4 addresses that are allowed to connect (if not
467 * set, all are allowed).
468 */
469 struct IPv4NetworkSet *v4_allowed;
470
471 /**
472 * IPv6 addresses that are allowed to connect (if not
473 * set, all are allowed).
474 */
475 struct IPv6NetworkSet *v6_allowed;
476
477 /**
478 * My (default) message handlers. Adjusted copy
479 * of "defhandlers".
480 */
481 struct GNUNET_SERVER_MessageHandler *my_handlers;
482
483 /**
484 * Idle timeout for server.
485 */
486 struct GNUNET_TIME_Relative timeout;
487
488 /**
489 * Maximum buffer size for the server.
490 */
491 size_t maxbuf;
492
493 /**
494 * Overall success/failure of the service start.
495 */
496 int ret;
497
498 /**
499 * If we are daemonizing, this FD is set to the
500 * pipe to the parent. Send '.' if we started
501 * ok, '!' if not. -1 if we are not daemonizing.
502 */
503 int ready_confirm_fd;
504
505 /**
506 * Do we close connections if we receive messages
507 * for which we have no handler?
508 */
509 int require_found;
510
511 /**
512 * Can clients ask us to initiate a shutdown?
513 */
514 int allow_shutdown;
515
516 /**
517 * Length of addr.
518 */
519 socklen_t addrlen;
520
521};
522
523
524/* ****************** message handlers ****************** */
525
526static size_t
527write_test (void *cls, size_t size, void *buf)
528{
529 struct GNUNET_SERVER_Client *client = cls;
530 struct GNUNET_MessageHeader *msg;
531
532 if (size < sizeof (struct GNUNET_MessageHeader))
533 {
534 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
535 return 0; /* client disconnected */
536 }
537 msg = (struct GNUNET_MessageHeader *) buf;
538 msg->type = htons (GNUNET_MESSAGE_TYPE_TEST);
539 msg->size = htons (sizeof (struct GNUNET_MessageHeader));
540 GNUNET_SERVER_receive_done (client, GNUNET_OK);
541 return sizeof (struct GNUNET_MessageHeader);
542}
543
544/**
545 * Handler for TEST message.
546 *
547 * @param cls closure (refers to service)
548 * @param server the server handling the message
549 * @param client identification of the client
550 * @param message the actual message
551 */
552static void
553handle_test (void *cls,
554 struct GNUNET_SERVER_Handle *server,
555 struct GNUNET_SERVER_Client *client,
556 const struct GNUNET_MessageHeader *message)
557{
558 /* simply bounce message back to acknowledge */
559 if (NULL == GNUNET_SERVER_notify_transmit_ready (client,
560 sizeof (struct
561 GNUNET_MessageHeader),
562 GNUNET_TIME_UNIT_FOREVER_REL,
563 &write_test, client))
564 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
565}
566
567
568/**
569 * Handler for SHUTDOWN message.
570 *
571 * @param cls closure (refers to service)
572 * @param server the server handling the message
573 * @param client identification of the client
574 * @param message the actual message
575 */
576static void
577handle_shutdown (void *cls,
578 struct GNUNET_SERVER_Handle *server,
579 struct GNUNET_SERVER_Client *client,
580 const struct GNUNET_MessageHeader *message)
581{
582 struct GNUNET_SERVICE_Context *service = cls;
583 if (!service->allow_shutdown)
584 {
585 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
586 _
587 ("Received shutdown request, but configured to ignore!\n"));
588 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
589 return;
590 }
591 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
592 _("Initiating shutdown as requested by client.\n"));
593 GNUNET_assert (service->sched != NULL);
594 GNUNET_SCHEDULER_shutdown (service->sched);
595 GNUNET_SERVER_receive_done (client, GNUNET_OK);
596}
597
598
599/**
600 * Default handlers for all services. Will be copied and the
601 * "callback_cls" fields will be replaced with the specific service
602 * struct.
603 */
604static const struct GNUNET_SERVER_MessageHandler defhandlers[] = {
605 {&handle_test, NULL, GNUNET_MESSAGE_TYPE_TEST,
606 sizeof (struct GNUNET_MessageHeader)},
607 {&handle_shutdown, NULL, GNUNET_MESSAGE_TYPE_SHUTDOWN,
608 sizeof (struct GNUNET_MessageHeader)},
609 {NULL, NULL, 0, 0}
610};
611
612
613
614/* ****************** service core routines ************** */
615
616
617/**
618 * Check if access to the service is allowed from the given address.
619 */
620static int
621check_access (void *cls, const struct sockaddr *addr, socklen_t addrlen)
622{
623 struct GNUNET_SERVICE_Context *sctx = cls;
624 const struct sockaddr_in *i4;
625 const struct sockaddr_in6 *i6;
626 int ret;
627 char buf[INET6_ADDRSTRLEN];
628 uint16_t port;
629
630 switch (addr->sa_family)
631 {
632 case AF_INET:
633 GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
634 i4 = (const struct sockaddr_in *) addr;
635 port = ntohs (i4->sin_port);
636 ret = ((sctx->v4_allowed == NULL) ||
637 (check_ipv4_listed (sctx->v4_allowed,
638 &i4->sin_addr)))
639 && ((sctx->v4_denied == NULL) ||
640 (!check_ipv4_listed (sctx->v4_denied, &i4->sin_addr)));
641 if (ret != GNUNET_OK)
642 inet_ntop (AF_INET, &i4->sin_addr, buf, sizeof (buf));
643 break;
644 case AF_INET6:
645 GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
646 i6 = (const struct sockaddr_in6 *) addr;
647 port = ntohs (i6->sin6_port);
648 ret = ((sctx->v6_allowed == NULL) ||
649 (check_ipv6_listed (sctx->v6_allowed,
650 &i6->sin6_addr)))
651 && ((sctx->v6_denied == NULL) ||
652 (!check_ipv6_listed (sctx->v6_denied, &i6->sin6_addr)));
653 if (ret != GNUNET_OK)
654 inet_ntop (AF_INET6, &i6->sin6_addr, buf, sizeof (buf));
655 break;
656 default:
657 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
658 _("Unknown address family %d\n"), addr->sa_family);
659 return GNUNET_SYSERR;
660 }
661 if (ret != GNUNET_OK)
662 {
663 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
664 _("Access from `%s:%u' denied to service `%s'\n"),
665 buf, port, sctx->serviceName);
666 }
667 return ret;
668}
669
670
671/**
672 * Get the name of the file where we will
673 * write the PID of the service.
674 */
675static char *
676get_pid_file_name (struct GNUNET_SERVICE_Context *sctx)
677{
678
679 char *pif;
680
681 if (GNUNET_OK !=
682 GNUNET_CONFIGURATION_get_value_filename (sctx->cfg,
683 sctx->serviceName,
684 "PIDFILE", &pif))
685 return NULL;
686 return pif;
687}
688
689
690/**
691 * Parse an IPv4 access control list.
692 */
693static int
694process_acl4 (struct IPv4NetworkSet **ret,
695 struct GNUNET_SERVICE_Context *sctx, const char *option)
696{
697 char *opt;
698
699 if (!GNUNET_CONFIGURATION_have_value (sctx->cfg, sctx->serviceName, option))
700 return GNUNET_OK;
701 GNUNET_break (GNUNET_OK ==
702 GNUNET_CONFIGURATION_get_value_string (sctx->cfg,
703 sctx->serviceName,
704 option, &opt));
705 if (NULL == (*ret = parse_ipv4_specification (opt)))
706 {
707 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
708 _
709 ("Could not parse IPv4 network specification `%s' for `%s:%s'\n"),
710 opt, sctx->serviceName, option);
711 GNUNET_free (opt);
712 return GNUNET_SYSERR;
713 }
714 GNUNET_free (opt);
715 return GNUNET_OK;
716}
717
718
719/**
720 * Parse an IPv4 access control list.
721 */
722static int
723process_acl6 (struct IPv6NetworkSet **ret,
724 struct GNUNET_SERVICE_Context *sctx, const char *option)
725{
726 char *opt;
727 if (!GNUNET_CONFIGURATION_have_value (sctx->cfg, sctx->serviceName, option))
728 return GNUNET_OK;
729 GNUNET_break (GNUNET_OK ==
730 GNUNET_CONFIGURATION_get_value_string (sctx->cfg,
731 sctx->serviceName,
732 option, &opt));
733 if (NULL == (*ret = parse_ipv6_specification (opt)))
734 {
735 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
736 _
737 ("Could not parse IPv6 network specification `%s' for `%s:%s'\n"),
738 opt, sctx->serviceName, option);
739 GNUNET_free (opt);
740 return GNUNET_SYSERR;
741 }
742 GNUNET_free (opt);
743 return GNUNET_OK;
744}
745
746
747/**
748 * Setup addr, addrlen, maxbuf, idle_timeout
749 * based on configuration!
750 *
751 * Configuration must specify a "PORT". It may
752 * specify:
753 * - TIMEOUT (after how many ms does an inactive service timeout);
754 * - MAXBUF (maximum incoming message size supported)
755 * - DISABLEV6 (disable support for IPv6, otherwise we use dual-stack)
756 * - ALLOW_SHUTDOWN (allow clients to shutdown this service)
757 * - BINDTO (hostname or IP address to bind to, otherwise we take everything)
758 * - ACCEPT_FROM (only allow connections from specified IPv4 subnets)
759 * - ACCEPT_FROM6 (only allow connections from specified IPv6 subnets)
760 * - REJECT_FROM (disallow allow connections from specified IPv4 subnets)
761 * - REJECT_FROM6 (disallow allow connections from specified IPv6 subnets)
762 *
763 * @return GNUNET_OK if configuration succeeded
764 */
765static int
766setup_service (struct GNUNET_SERVICE_Context *sctx)
767{
768 unsigned long long maxbuf;
769 unsigned long long idleout;
770 char *hostname;
771 unsigned long long port;
772 int disablev6;
773 struct addrinfo hints;
774 struct addrinfo *res;
775 struct addrinfo *pos;
776 int ret;
777 int tolerant;
778
779 if (GNUNET_CONFIGURATION_have_value (sctx->cfg,
780 sctx->serviceName, "TIMEOUT"))
781 {
782 if (GNUNET_OK !=
783 GNUNET_CONFIGURATION_get_value_number (sctx->cfg,
784 sctx->serviceName,
785 "TIMEOUT", &idleout))
786 return GNUNET_SYSERR;
787
788 sctx->timeout.value = idleout;
789 }
790 else
791 sctx->timeout = GNUNET_TIME_UNIT_FOREVER_REL;
792 if (GNUNET_CONFIGURATION_have_value (sctx->cfg,
793 sctx->serviceName, "MAXBUF"))
794 {
795 if (GNUNET_OK !=
796 GNUNET_CONFIGURATION_get_value_number (sctx->cfg,
797 sctx->serviceName,
798 "MAXBUF", &maxbuf))
799 return GNUNET_SYSERR;
800 }
801 else
802 maxbuf = GNUNET_SERVER_MAX_MESSAGE_SIZE;
803 if (GNUNET_CONFIGURATION_have_value (sctx->cfg,
804 sctx->serviceName, "DISABLEV6"))
805 {
806 if (GNUNET_SYSERR ==
807 (disablev6 = GNUNET_CONFIGURATION_get_value_yesno (sctx->cfg,
808 sctx->
809 serviceName,
810 "DISABLEV6")))
811 return GNUNET_SYSERR;
812 }
813 else
814 disablev6 = GNUNET_NO;
815 if (GNUNET_CONFIGURATION_have_value (sctx->cfg,
816 sctx->serviceName, "ALLOW_SHUTDOWN"))
817 {
818 if (GNUNET_SYSERR ==
819 (sctx->allow_shutdown =
820 GNUNET_CONFIGURATION_get_value_yesno (sctx->cfg, sctx->serviceName,
821 "ALLOW_SHUTDOWN")))
822 return GNUNET_SYSERR;
823 }
824 else
825 sctx->allow_shutdown = GNUNET_NO;
826
827 if (!disablev6)
828 {
829 /* probe IPv6 support */
830 ret = SOCKET (PF_INET6, SOCK_STREAM, 0);
831 if (ret == -1)
832 {
833 if ((errno == ENOBUFS) ||
834 (errno == ENOMEM) || (errno == ENFILE) || (errno == EACCES))
835 {
836 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
837 return GNUNET_SYSERR;
838 }
839 ret = SOCKET (PF_INET, SOCK_STREAM, 0);
840 if (ret != -1)
841 {
842 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
843 _
844 ("Disabling IPv6 support for service `%s', failed to create IPv6 socket: %s\n"),
845 sctx->serviceName, strerror (errno));
846 disablev6 = GNUNET_YES;
847 }
848 }
849 if (ret != -1)
850 GNUNET_break (0 == CLOSE (ret));
851 }
852
853
854
855 if (GNUNET_CONFIGURATION_have_value (sctx->cfg,
856 sctx->serviceName, "TOLERANT"))
857 {
858 if (GNUNET_SYSERR ==
859 (tolerant = GNUNET_CONFIGURATION_get_value_yesno (sctx->cfg,
860 sctx->serviceName,
861 "TOLERANT")))
862 return GNUNET_SYSERR;
863 }
864 else
865 tolerant = GNUNET_NO;
866 sctx->require_found = tolerant ? GNUNET_NO : GNUNET_YES;
867
868
869 if ((GNUNET_OK !=
870 GNUNET_CONFIGURATION_get_value_number (sctx->cfg,
871 sctx->serviceName,
872 "PORT",
873 &port)) || (port > 65535))
874 {
875 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
876 _
877 ("Require valid port number for service `%s' in configuration!\n"),
878 sctx->serviceName);
879 return GNUNET_SYSERR;
880 }
881 if (GNUNET_CONFIGURATION_have_value (sctx->cfg,
882 sctx->serviceName, "BINDTO"))
883 {
884 GNUNET_break (GNUNET_OK ==
885 GNUNET_CONFIGURATION_get_value_string (sctx->cfg,
886 sctx->serviceName,
887 "BINDTO",
888 &hostname));
889 }
890 else
891 hostname = NULL;
892
893 if (hostname != NULL)
894 {
895 memset (&hints, 0, sizeof (struct addrinfo));
896 if (disablev6)
897 hints.ai_family = AF_INET;
898 if ((0 != (ret = getaddrinfo (hostname,
899 NULL, &hints, &res))) || (res == NULL))
900 {
901 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
902 _("Failed to resolve `%s': %s\n"),
903 hostname, gai_strerror (ret));
904 GNUNET_free (hostname);
905 return GNUNET_SYSERR;
906 }
907 pos = res;
908 while ((NULL != pos) &&
909 (((disablev6) &&
910 (pos->ai_family != AF_INET)) ||
911 ((pos->ai_family != AF_INET) && (pos->ai_family != AF_INET6))))
912 pos = pos->ai_next;
913 if (pos == NULL)
914 {
915 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
916 _("Failed to find IPv4 address for `%s'.\n"), hostname);
917 freeaddrinfo (res);
918 GNUNET_free (hostname);
919 return GNUNET_SYSERR;
920 }
921 GNUNET_free (hostname);
922 if (pos->ai_family == AF_INET)
923 {
924 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in));
925 sctx->addrlen = pos->ai_addrlen;
926 sctx->addr = GNUNET_malloc (sctx->addrlen);
927 memcpy (sctx->addr, res->ai_addr, sctx->addrlen);
928 ((struct sockaddr_in *) sctx->addr)->sin_port = htons (port);
929 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
930 _
931 ("Configured to bind to %s address; %s connections to this service will fail!\n"),
932 "IPv4", "IPv6");
933 }
934 else
935 {
936 GNUNET_assert (pos->ai_family == AF_INET6);
937 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in6));
938 sctx->addrlen = pos->ai_addrlen;
939 sctx->addr = GNUNET_malloc (sctx->addrlen);
940 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
941 _
942 ("Configured to bind to %s address; %s connections to this service will fail!\n"),
943 "IPv6", "IPv4");
944 ((struct sockaddr_in6 *) sctx->addr)->sin6_port = htons (port);
945 }
946 freeaddrinfo (res);
947 }
948 else
949 {
950 /* will bind against everything, just set port */
951 if (disablev6)
952 {
953 /* V4-only */
954 sctx->addrlen = sizeof (struct sockaddr_in6);
955 sctx->addr = GNUNET_malloc (sctx->addrlen);
956 ((struct sockaddr_in *) sctx->addr)->sin_family = AF_INET;
957 ((struct sockaddr_in *) sctx->addr)->sin_port = htons (port);
958 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
959 _
960 ("Configured to bind to %s address; %s connections to this service will fail!\n"),
961 "IPv4", "IPv6");
962 }
963 else
964 {
965 /* dual stack */
966 sctx->addrlen = sizeof (struct sockaddr_in6);
967 sctx->addr = GNUNET_malloc (sctx->addrlen);
968 ((struct sockaddr_in6 *) sctx->addr)->sin6_family = AF_INET6;
969 ((struct sockaddr_in6 *) sctx->addr)->sin6_port = htons (port);
970 }
971 }
972 sctx->maxbuf = (size_t) maxbuf;
973 if (sctx->maxbuf != maxbuf)
974 {
975 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
976 _
977 ("Value in configuration for `%s' and service `%s' too large!\n"),
978 "MAXBUF", sctx->serviceName);
979 return GNUNET_SYSERR;
980 }
981
982
983 if ((GNUNET_OK !=
984 process_acl4 (&sctx->v4_denied,
985 sctx,
986 "REJECT_FROM")) ||
987 (GNUNET_OK !=
988 process_acl4 (&sctx->v4_allowed,
989 sctx,
990 "ACCEPT_FROM")) ||
991 (GNUNET_OK !=
992 process_acl6 (&sctx->v6_denied,
993 sctx,
994 "REJECT_FROM6")) ||
995 (GNUNET_OK != process_acl6 (&sctx->v6_allowed, sctx, "ACCEPT_FROM6")))
996 return GNUNET_SYSERR;
997 return GNUNET_OK;
998}
999
1000
1001/**
1002 * Get the name of the user that'll be used
1003 * to provide the service.
1004 */
1005static char *
1006get_user_name (struct GNUNET_SERVICE_Context *sctx)
1007{
1008
1009 char *un;
1010
1011 if (GNUNET_OK !=
1012 GNUNET_CONFIGURATION_get_value_filename (sctx->cfg,
1013 sctx->serviceName,
1014 "USERNAME", &un))
1015 return NULL;
1016 return un;
1017}
1018
1019/**
1020 * Write PID file.
1021 */
1022static int
1023write_pid_file (struct GNUNET_SERVICE_Context *sctx, pid_t pid)
1024{
1025 FILE *pidfd;
1026 char *pif;
1027 char *user;
1028 char *rdir;
1029 int len;
1030
1031 if (NULL == (pif = get_pid_file_name (sctx)))
1032 return GNUNET_OK; /* no file desired */
1033 user = get_user_name (sctx);
1034 rdir = GNUNET_strdup (pif);
1035 len = strlen (rdir);
1036 while ((len > 0) && (rdir[len] != DIR_SEPARATOR))
1037 len--;
1038 rdir[len] = '\0';
1039 if (0 != ACCESS (rdir, F_OK))
1040 {
1041 /* we get to create a directory -- and claim it
1042 as ours! */
1043 GNUNET_DISK_directory_create (rdir);
1044 if ((user != NULL) && (0 < strlen (user)))
1045 GNUNET_DISK_file_change_owner (rdir, user);
1046 }
1047 if (0 != ACCESS (rdir, W_OK | X_OK))
1048 {
1049 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "access", rdir);
1050 GNUNET_free (rdir);
1051 GNUNET_free_non_null (user);
1052 GNUNET_free (pif);
1053 return GNUNET_SYSERR;
1054 }
1055 GNUNET_free (rdir);
1056 pidfd = FOPEN (pif, "w");
1057 if (pidfd == NULL)
1058 {
1059 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "fopen", pif);
1060 GNUNET_free (pif);
1061 GNUNET_free_non_null (user);
1062 return GNUNET_SYSERR;
1063 }
1064 if (0 > FPRINTF (pidfd, "%u", pid))
1065 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "fprintf", pif);
1066 GNUNET_break (0 == fclose (pidfd));
1067 if ((user != NULL) && (0 < strlen (user)))
1068 GNUNET_DISK_file_change_owner (pif, user);
1069 GNUNET_free_non_null (user);
1070 GNUNET_free (pif);
1071 return GNUNET_OK;
1072}
1073
1074
1075/**
1076 * Initial task for the service.
1077 */
1078static void
1079service_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1080{
1081 struct GNUNET_SERVICE_Context *sctx = cls;
1082 unsigned int i;
1083
1084 sctx->sched = tc->sched;
1085 sctx->server = GNUNET_SERVER_create (tc->sched,
1086 &check_access,
1087 sctx,
1088 sctx->addr,
1089 sctx->addrlen,
1090 sctx->maxbuf,
1091 sctx->timeout, sctx->require_found);
1092 if (sctx->server == NULL)
1093 {
1094 sctx->ret = GNUNET_SYSERR;
1095 return;
1096 }
1097 sctx->my_handlers = GNUNET_malloc (sizeof (defhandlers));
1098 memcpy (sctx->my_handlers, defhandlers, sizeof (defhandlers));
1099 i = 0;
1100 while ((sctx->my_handlers[i].callback != NULL))
1101 sctx->my_handlers[i++].callback_cls = sctx;
1102 GNUNET_SERVER_add_handlers (sctx->server, sctx->my_handlers);
1103 if (sctx->ready_confirm_fd != -1)
1104 {
1105 GNUNET_break (1 == WRITE (sctx->ready_confirm_fd, ".", 1));
1106 GNUNET_break (0 == CLOSE (sctx->ready_confirm_fd));
1107 sctx->ready_confirm_fd = -1;
1108 write_pid_file (sctx, getpid ());
1109 }
1110
1111 sctx->task (sctx->task_cls, tc->sched, sctx->server, sctx->cfg);
1112}
1113
1114
1115/**
1116 * Detach from terminal.
1117 */
1118static int
1119detach_terminal (struct GNUNET_SERVICE_Context *sctx)
1120{
1121 pid_t pid;
1122 int nullfd;
1123 int filedes[2];
1124
1125#ifndef MINGW
1126 if (0 != PIPE (filedes))
1127 {
1128 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "pipe");
1129 return GNUNET_SYSERR;
1130 }
1131 pid = fork ();
1132 if (pid < 0)
1133 {
1134 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "fork");
1135 return GNUNET_SYSERR;
1136 }
1137 if (pid != 0)
1138 {
1139 /* Parent */
1140 char c;
1141
1142 GNUNET_break (0 == CLOSE (filedes[1]));
1143 c = 'X';
1144 if (1 != READ (filedes[0], &c, sizeof (char)))
1145 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "read");
1146 fflush (stdout);
1147 switch (c)
1148 {
1149 case '.':
1150 exit (0);
1151 case 'I':
1152 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1153 _("Service process failed to initialize\n"));
1154 break;
1155 case 'S':
1156 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1157 _
1158 ("Service process could not initialize server function\n"));
1159 break;
1160 case 'X':
1161 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1162 _("Service process failed to report status\n"));
1163 break;
1164 }
1165 exit (1); /* child reported error */
1166 }
1167 GNUNET_break (0 == CLOSE (0));
1168 GNUNET_break (0 == CLOSE (1));
1169 GNUNET_break (0 == CLOSE (filedes[0]));
1170 nullfd = GNUNET_DISK_file_open ("/dev/null", O_RDWR | O_APPEND);
1171 if (nullfd < 0)
1172 return GNUNET_SYSERR;
1173 /* set stdin/stdout to /dev/null */
1174 if ((dup2 (nullfd, 0) < 0) || (dup2 (nullfd, 1) < 0))
1175 {
1176 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "dup2");
1177 return GNUNET_SYSERR;
1178 }
1179 /* Detach from controlling terminal */
1180 pid = setsid ();
1181 if (pid == -1)
1182 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "setsid");
1183 sctx->ready_confirm_fd = filedes[1];
1184#else
1185 /* FIXME: we probably need to do something else
1186 elsewhere in order to fork the process itself... */
1187 FreeConsole ();
1188#endif
1189 return GNUNET_OK;
1190}
1191
1192
1193/**
1194 * Set user ID.
1195 */
1196static int
1197set_user_id (struct GNUNET_SERVICE_Context *sctx)
1198{
1199 char *user;
1200
1201 if (NULL == (user = get_user_name (sctx)))
1202 return GNUNET_OK; /* keep */
1203#ifndef MINGW
1204 struct passwd *pws;
1205
1206 errno = 0;
1207 pws = getpwnam (user);
1208 if (pws == NULL)
1209 {
1210 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1211 _("Cannot obtain information about user `%s': %s\n"),
1212 user, errno == 0 ? _("No such user") : STRERROR (errno));
1213 GNUNET_free (user);
1214 return GNUNET_SYSERR;
1215 }
1216 if ((0 != setgid (pws->pw_gid)) || (0 != setegid (pws->pw_gid)) ||
1217#if HAVE_INITGROUPS
1218 (0 != initgroups (user, pws->pw_gid)) ||
1219#endif
1220 (0 != setuid (pws->pw_uid)) || (0 != seteuid (pws->pw_uid)))
1221 {
1222 if ((0 != setregid (pws->pw_gid, pws->pw_gid)) ||
1223 (0 != setreuid (pws->pw_uid, pws->pw_uid)))
1224 {
1225 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1226 _("Cannot change user/group to `%s': %s\n"), user,
1227 STRERROR (errno));
1228 GNUNET_free (user);
1229 return GNUNET_SYSERR;
1230 }
1231 }
1232#endif
1233 GNUNET_free (user);
1234 return GNUNET_OK;
1235}
1236
1237
1238/**
1239 * Delete the PID file that was created by our parent.
1240 */
1241static void
1242pid_file_delete (struct GNUNET_SERVICE_Context *sctx)
1243{
1244 char *pif = get_pid_file_name (sctx);
1245 if (pif == NULL)
1246 return; /* no PID file */
1247 if (0 != UNLINK (pif))
1248 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink", pif);
1249 GNUNET_free (pif);
1250}
1251
1252/**
1253 * Run a standard GNUnet service startup sequence (initialize loggers
1254 * and configuration, parse options).
1255 *
1256 * @param argc number of command line arguments
1257 * @param argv command line arguments
1258 * @param serviceName our service name
1259 * @param task main task of the service
1260 * @param task_cls closure for task
1261 * @param term termination task of the service
1262 * @param term_cls closure for term
1263 * @return GNUNET_SYSERR on error, GNUNET_OK
1264 * if we shutdown nicely
1265 */
1266int
1267GNUNET_SERVICE_run (int argc,
1268 char *const *argv,
1269 const char *serviceName,
1270 GNUNET_SERVICE_Main task,
1271 void *task_cls, GNUNET_SERVICE_Term term, void *term_cls)
1272{
1273 char *cfg_fn;
1274 char *loglev;
1275 char *logfile;
1276 int do_daemonize;
1277 struct GNUNET_SERVICE_Context sctx;
1278 struct GNUNET_GETOPT_CommandLineOption service_options[] = {
1279 GNUNET_GETOPT_OPTION_CFG_FILE (&cfg_fn),
1280 {'d', "daemonize", NULL,
1281 gettext_noop ("do daemonize (detach from terminal)"), 0,
1282 GNUNET_GETOPT_set_one, &do_daemonize},
1283 GNUNET_GETOPT_OPTION_HELP (serviceName),
1284 GNUNET_GETOPT_OPTION_LOGLEVEL (&loglev),
1285 GNUNET_GETOPT_OPTION_LOGFILE (&logfile),
1286 GNUNET_GETOPT_OPTION_VERSION (PACKAGE_VERSION),
1287 GNUNET_GETOPT_OPTION_END
1288 };
1289 do_daemonize = 0;
1290 logfile = NULL;
1291 loglev = GNUNET_strdup ("WARNING");
1292 cfg_fn = GNUNET_strdup (GNUNET_DEFAULT_DAEMON_CONFIG_FILE);
1293 memset (&sctx, 0, sizeof (sctx));
1294 sctx.ready_confirm_fd = -1;
1295 sctx.ret = GNUNET_OK;
1296 sctx.timeout = GNUNET_TIME_UNIT_FOREVER_REL;
1297 sctx.maxbuf = GNUNET_SERVER_MAX_MESSAGE_SIZE;
1298 sctx.task = task;
1299 sctx.serviceName = serviceName;
1300 sctx.cfg = GNUNET_CONFIGURATION_create ();
1301 /* setup subsystems */
1302 if ((GNUNET_SYSERR ==
1303 GNUNET_GETOPT_run (serviceName,
1304 sctx.cfg,
1305 service_options,
1306 argc,
1307 argv)) ||
1308 (GNUNET_OK !=
1309 GNUNET_log_setup (serviceName, loglev, logfile)) ||
1310 (GNUNET_OK !=
1311 GNUNET_CONFIGURATION_load (sctx.cfg, cfg_fn)) ||
1312 (GNUNET_OK !=
1313 setup_service (&sctx)) ||
1314 ((do_daemonize == 1) &&
1315 (GNUNET_OK != detach_terminal (&sctx))) ||
1316 (GNUNET_OK != set_user_id (&sctx)))
1317 {
1318 if (sctx.ready_confirm_fd != -1)
1319 {
1320 if (1 != WRITE (sctx.ready_confirm_fd, "I", 1))
1321 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "write");
1322 GNUNET_break (0 == CLOSE (sctx.ready_confirm_fd));
1323 }
1324 GNUNET_CONFIGURATION_destroy (sctx.cfg);
1325 GNUNET_free_non_null (sctx.addr);
1326 GNUNET_free_non_null (logfile);
1327 GNUNET_free (loglev);
1328 GNUNET_free (cfg_fn);
1329 GNUNET_free_non_null (sctx.v4_denied);
1330 GNUNET_free_non_null (sctx.v6_denied);
1331 GNUNET_free_non_null (sctx.v4_allowed);
1332 GNUNET_free_non_null (sctx.v6_allowed);
1333 return GNUNET_SYSERR;
1334 }
1335
1336 /* actually run service */
1337 GNUNET_SCHEDULER_run (&service_task, &sctx);
1338 if (sctx.ready_confirm_fd != -1)
1339 {
1340 if (1 != WRITE (sctx.ready_confirm_fd, "S", 1))
1341 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "write");
1342 GNUNET_break (0 == CLOSE (sctx.ready_confirm_fd));
1343 }
1344
1345 /* shutdown */
1346 if (term != NULL)
1347 term (term_cls, sctx.cfg);
1348 if ((do_daemonize == 1) && (sctx.server != NULL))
1349 pid_file_delete (&sctx);
1350 if (sctx.server != NULL)
1351 GNUNET_SERVER_destroy (sctx.server);
1352 GNUNET_free_non_null (sctx.my_handlers);
1353 GNUNET_CONFIGURATION_destroy (sctx.cfg);
1354 GNUNET_free_non_null (sctx.addr);
1355 GNUNET_free_non_null (logfile);
1356 GNUNET_free (loglev);
1357 GNUNET_free (cfg_fn);
1358 GNUNET_free_non_null (sctx.v4_denied);
1359 GNUNET_free_non_null (sctx.v6_denied);
1360 GNUNET_free_non_null (sctx.v4_allowed);
1361 GNUNET_free_non_null (sctx.v6_allowed);
1362 return sctx.ret;
1363}
1364
1365
1366/**
1367 * Run a service startup sequence within an existing
1368 * initialized system.
1369 *
1370 * @param serviceName our service name
1371 * @param sched scheduler to use
1372 * @param cfg configuration to use
1373 * @return NULL on error, service handle
1374 */
1375struct GNUNET_SERVICE_Context *
1376GNUNET_SERVICE_start (const char *serviceName,
1377 struct GNUNET_SCHEDULER_Handle *sched,
1378 struct GNUNET_CONFIGURATION_Handle *cfg)
1379{
1380 int i;
1381 struct GNUNET_SERVICE_Context *sctx;
1382
1383 sctx = GNUNET_malloc (sizeof (struct GNUNET_SERVICE_Context));
1384 sctx->ready_confirm_fd = -1; /* no daemonizing */
1385 sctx->ret = GNUNET_OK;
1386 sctx->timeout = GNUNET_TIME_UNIT_FOREVER_REL;
1387 sctx->maxbuf = GNUNET_SERVER_MAX_MESSAGE_SIZE;
1388 sctx->serviceName = serviceName;
1389 sctx->cfg = cfg;
1390 sctx->sched = sched;
1391
1392 /* setup subsystems */
1393 if ((GNUNET_OK != setup_service (sctx)) ||
1394 (NULL == (sctx->server = GNUNET_SERVER_create (sched,
1395 &check_access,
1396 sctx,
1397 sctx->addr,
1398 sctx->addrlen,
1399 sctx->maxbuf,
1400 sctx->timeout,
1401 sctx->require_found))))
1402 {
1403 GNUNET_SERVICE_stop (sctx);
1404 return NULL;
1405 }
1406 sctx->my_handlers = GNUNET_malloc (sizeof (defhandlers));
1407 memcpy (sctx->my_handlers, defhandlers, sizeof (defhandlers));
1408 i = 0;
1409 while ((sctx->my_handlers[i].callback != NULL))
1410 sctx->my_handlers[i++].callback_cls = sctx;
1411 GNUNET_SERVER_add_handlers (sctx->server, sctx->my_handlers);
1412
1413
1414 return sctx;
1415}
1416
1417/**
1418 * Obtain the server used by a service. Note that the server must NOT
1419 * be destroyed by the caller.
1420 *
1421 * @param ctx the service context returned from the start function
1422 * @return handle to the server for this service, NULL if there is none
1423 */
1424struct GNUNET_SERVER_Handle *
1425GNUNET_SERVICE_get_server (struct GNUNET_SERVICE_Context *ctx)
1426{
1427 return ctx->server;
1428}
1429
1430
1431/**
1432 * Stop a service that was started with "GNUNET_SERVICE_start".
1433 *
1434 * @param ctx the service context returned from the start function
1435 */
1436void
1437GNUNET_SERVICE_stop (struct GNUNET_SERVICE_Context *sctx)
1438{
1439 if (NULL != sctx->server)
1440 GNUNET_SERVER_destroy (sctx->server);
1441 GNUNET_free_non_null (sctx->my_handlers);
1442 GNUNET_free_non_null (sctx->addr);
1443 GNUNET_free_non_null (sctx->v4_denied);
1444 GNUNET_free_non_null (sctx->v6_denied);
1445 GNUNET_free_non_null (sctx->v4_allowed);
1446 GNUNET_free_non_null (sctx->v6_allowed);
1447 GNUNET_free (sctx);
1448}
1449
1450
1451/* end of service.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-23 19:04:12 +0000