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authorChristian Grothoff <christian@grothoff.org>2017-03-16 05:33:01 +0100
committerChristian Grothoff <christian@grothoff.org>2017-03-16 05:33:01 +0100
commitd23a815951413af100c74b38cdd09a01ca1c280a (patch)
tree5fd6a3eae1cd4497dc728917362067a8aded3151 /src/util/service.c
parenta3acd27f0acf30a6c4803ec933c4fe7650bc296c (diff)
downloadgnunet-d23a815951413af100c74b38cdd09a01ca1c280a.tar.gz
gnunet-d23a815951413af100c74b38cdd09a01ca1c280a.zip
removing dead/legacy server/connection logic, except for in tcp/wlan/bt plugins (which will be updated 'later')
Diffstat (limited to 'src/util/service.c')
-rw-r--r--src/util/service.c1697
1 files changed, 0 insertions, 1697 deletions
diff --git a/src/util/service.c b/src/util/service.c
deleted file mode 100644
index 496904fb1..000000000
--- a/src/util/service.c
+++ /dev/null
@@ -1,1697 +0,0 @@
1/*
2 This file is part of GNUnet.
3 Copyright (C) 2009, 2012 GNUnet e.V.
4
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, 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_util_lib.h"
28#include "gnunet_protocols.h"
29#include "gnunet_constants.h"
30#include "gnunet_resolver_service.h"
31#include "speedup.h"
32
33#if HAVE_MALLINFO
34#include <malloc.h>
35#include "gauger.h"
36#endif
37
38
39#define LOG(kind,...) GNUNET_log_from (kind, "util-service", __VA_ARGS__)
40
41#define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util-service", syscall)
42
43#define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util-service", syscall, filename)
44
45
46/* ******************* access control ******************** */
47
48/**
49 * Check if the given IP address is in the list of IP addresses.
50 *
51 * @param list a list of networks
52 * @param add the IP to check (in network byte order)
53 * @return #GNUNET_NO if the IP is not in the list, #GNUNET_YES if it it is
54 */
55static int
56check_ipv4_listed (const struct GNUNET_STRINGS_IPv4NetworkPolicy *list,
57 const struct in_addr *add)
58{
59 unsigned int i;
60
61 if (NULL == list)
62 return GNUNET_NO;
63 i = 0;
64 while ((list[i].network.s_addr != 0) || (list[i].netmask.s_addr != 0))
65 {
66 if ((add->s_addr & list[i].netmask.s_addr) ==
67 (list[i].network.s_addr & list[i].netmask.s_addr))
68 return GNUNET_YES;
69 i++;
70 }
71 return GNUNET_NO;
72}
73
74
75/**
76 * Check if the given IP address is in the list of IP addresses.
77 *
78 * @param list a list of networks
79 * @param ip the IP to check (in network byte order)
80 * @return #GNUNET_NO if the IP is not in the list, #GNUNET_YES if it it is
81 */
82static int
83check_ipv6_listed (const struct GNUNET_STRINGS_IPv6NetworkPolicy *list,
84 const struct in6_addr *ip)
85{
86 unsigned int i;
87 unsigned int j;
88 struct in6_addr zero;
89
90 if (NULL == list)
91 return GNUNET_NO;
92 memset (&zero, 0, sizeof (struct in6_addr));
93 i = 0;
94NEXT:
95 while (0 != memcmp (&zero, &list[i].network, sizeof (struct in6_addr)))
96 {
97 for (j = 0; j < sizeof (struct in6_addr) / sizeof (int); j++)
98 if (((((int *) ip)[j] & ((int *) &list[i].netmask)[j])) !=
99 (((int *) &list[i].network)[j] & ((int *) &list[i].netmask)[j]))
100 {
101 i++;
102 goto NEXT;
103 }
104 return GNUNET_YES;
105 }
106 return GNUNET_NO;
107}
108
109
110/* ****************** service struct ****************** */
111
112
113/**
114 * Context for "service_task".
115 */
116struct GNUNET_SERVICE_Context
117{
118 /**
119 * Our configuration.
120 */
121 const struct GNUNET_CONFIGURATION_Handle *cfg;
122
123 /**
124 * Handle for the server.
125 */
126 struct GNUNET_SERVER_Handle *server;
127
128 /**
129 * NULL-terminated array of addresses to bind to, NULL if we got pre-bound
130 * listen sockets.
131 */
132 struct sockaddr **addrs;
133
134 /**
135 * Name of our service.
136 */
137 const char *service_name;
138
139 /**
140 * Main service-specific task to run.
141 */
142 GNUNET_SERVICE_Main task;
143
144 /**
145 * Closure for @e task.
146 */
147 void *task_cls;
148
149 /**
150 * IPv4 addresses that are not allowed to connect.
151 */
152 struct GNUNET_STRINGS_IPv4NetworkPolicy *v4_denied;
153
154 /**
155 * IPv6 addresses that are not allowed to connect.
156 */
157 struct GNUNET_STRINGS_IPv6NetworkPolicy *v6_denied;
158
159 /**
160 * IPv4 addresses that are allowed to connect (if not
161 * set, all are allowed).
162 */
163 struct GNUNET_STRINGS_IPv4NetworkPolicy *v4_allowed;
164
165 /**
166 * IPv6 addresses that are allowed to connect (if not
167 * set, all are allowed).
168 */
169 struct GNUNET_STRINGS_IPv6NetworkPolicy *v6_allowed;
170
171 /**
172 * My (default) message handlers. Adjusted copy
173 * of "defhandlers".
174 */
175 struct GNUNET_SERVER_MessageHandler *my_handlers;
176
177 /**
178 * Array of the lengths of the entries in addrs.
179 */
180 socklen_t *addrlens;
181
182 /**
183 * NULL-terminated array of listen sockets we should take over.
184 */
185 struct GNUNET_NETWORK_Handle **lsocks;
186
187 /**
188 * Task ID of the shutdown task.
189 */
190 struct GNUNET_SCHEDULER_Task *shutdown_task;
191
192 /**
193 * Idle timeout for server.
194 */
195 struct GNUNET_TIME_Relative timeout;
196
197 /**
198 * Overall success/failure of the service start.
199 */
200 int ret;
201
202 /**
203 * If we are daemonizing, this FD is set to the
204 * pipe to the parent. Send '.' if we started
205 * ok, '!' if not. -1 if we are not daemonizing.
206 */
207 int ready_confirm_fd;
208
209 /**
210 * Do we close connections if we receive messages
211 * for which we have no handler?
212 */
213 int require_found;
214
215 /**
216 * Do we require a matching UID for UNIX domain socket connections?
217 * #GNUNET_NO means that the UID does not have to match (however,
218 * @e match_gid may still impose other access control checks).
219 */
220 int match_uid;
221
222 /**
223 * Do we require a matching GID for UNIX domain socket connections?
224 * Ignored if @e match_uid is #GNUNET_YES. Note that this is about
225 * checking that the client's UID is in our group OR that the
226 * client's GID is our GID. If both "match_gid" and @e match_uid are
227 * #GNUNET_NO, all users on the local system have access.
228 */
229 int match_gid;
230
231 /**
232 * Our options.
233 */
234 enum GNUNET_SERVICE_Options options;
235
236};
237
238
239/* ****************** message handlers ****************** */
240
241/**
242 * Send a 'TEST' message back to the client.
243 *
244 * @param cls the 'struct GNUNET_SERVER_Client' to send TEST to
245 * @param size number of bytes available in 'buf'
246 * @param buf where to copy the message
247 * @return number of bytes written to 'buf'
248 */
249static size_t
250write_test (void *cls, size_t size, void *buf)
251{
252 struct GNUNET_SERVER_Client *client = cls;
253 struct GNUNET_MessageHeader *msg;
254
255 if (size < sizeof (struct GNUNET_MessageHeader))
256 {
257 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
258 return 0; /* client disconnected */
259 }
260 msg = (struct GNUNET_MessageHeader *) buf;
261 msg->type = htons (GNUNET_MESSAGE_TYPE_TEST);
262 msg->size = htons (sizeof (struct GNUNET_MessageHeader));
263 GNUNET_SERVER_receive_done (client, GNUNET_OK);
264 return sizeof (struct GNUNET_MessageHeader);
265}
266
267
268/**
269 * Handler for TEST message.
270 *
271 * @param cls closure (refers to service)
272 * @param client identification of the client
273 * @param message the actual message
274 */
275static void
276handle_test (void *cls, struct GNUNET_SERVER_Client *client,
277 const struct GNUNET_MessageHeader *message)
278{
279 /* simply bounce message back to acknowledge */
280 if (NULL ==
281 GNUNET_SERVER_notify_transmit_ready (client,
282 sizeof (struct GNUNET_MessageHeader),
283 GNUNET_TIME_UNIT_FOREVER_REL,
284 &write_test, client))
285 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
286}
287
288
289/**
290 * Default handlers for all services. Will be copied and the
291 * "callback_cls" fields will be replaced with the specific service
292 * struct.
293 */
294static const struct GNUNET_SERVER_MessageHandler defhandlers[] = {
295 {&handle_test, NULL, GNUNET_MESSAGE_TYPE_TEST,
296 sizeof (struct GNUNET_MessageHeader)},
297 {NULL, NULL, 0, 0}
298};
299
300
301/* ****************** service core routines ************** */
302
303
304/**
305 * Check if access to the service is allowed from the given address.
306 *
307 * @param cls closure
308 * @param uc credentials, if available, otherwise NULL
309 * @param addr address
310 * @param addrlen length of address
311 * @return #GNUNET_YES to allow, #GNUNET_NO to deny, #GNUNET_SYSERR
312 * for unknown address family (will be denied).
313 */
314static int
315check_access (void *cls, const struct GNUNET_CONNECTION_Credentials *uc,
316 const struct sockaddr *addr, socklen_t addrlen)
317{
318 struct GNUNET_SERVICE_Context *sctx = cls;
319 const struct sockaddr_in *i4;
320 const struct sockaddr_in6 *i6;
321 int ret;
322
323 switch (addr->sa_family)
324 {
325 case AF_INET:
326 GNUNET_assert (addrlen == sizeof (struct sockaddr_in));
327 i4 = (const struct sockaddr_in *) addr;
328 ret = ((NULL == sctx->v4_allowed) ||
329 (check_ipv4_listed (sctx->v4_allowed, &i4->sin_addr))) &&
330 ((NULL == sctx->v4_denied) ||
331 (!check_ipv4_listed (sctx->v4_denied, &i4->sin_addr)));
332 break;
333 case AF_INET6:
334 GNUNET_assert (addrlen == sizeof (struct sockaddr_in6));
335 i6 = (const struct sockaddr_in6 *) addr;
336 ret = ((NULL == sctx->v6_allowed) ||
337 (check_ipv6_listed (sctx->v6_allowed, &i6->sin6_addr))) &&
338 ((NULL == sctx->v6_denied) ||
339 (!check_ipv6_listed (sctx->v6_denied, &i6->sin6_addr)));
340 break;
341#ifndef WINDOWS
342 case AF_UNIX:
343 ret = GNUNET_OK; /* controlled using file-system ACL now */
344 break;
345#endif
346 default:
347 LOG (GNUNET_ERROR_TYPE_WARNING, _("Unknown address family %d\n"),
348 addr->sa_family);
349 return GNUNET_SYSERR;
350 }
351 if (GNUNET_OK != ret)
352 {
353 LOG (GNUNET_ERROR_TYPE_WARNING,
354 _("Access from `%s' denied to service `%s'\n"),
355 GNUNET_a2s (addr, addrlen),
356 sctx->service_name);
357 }
358 return ret;
359}
360
361
362/**
363 * Get the name of the file where we will
364 * write the PID of the service.
365 *
366 * @param sctx service context
367 * @return name of the file for the process ID
368 */
369static char *
370get_pid_file_name (struct GNUNET_SERVICE_Context *sctx)
371{
372 char *pif;
373
374 if (GNUNET_OK !=
375 GNUNET_CONFIGURATION_get_value_filename (sctx->cfg, sctx->service_name,
376 "PIDFILE", &pif))
377 return NULL;
378 return pif;
379}
380
381
382/**
383 * Parse an IPv4 access control list.
384 *
385 * @param ret location where to write the ACL (set)
386 * @param sctx service context to use to get the configuration
387 * @param option name of the ACL option to parse
388 * @return #GNUNET_SYSERR on parse error, #GNUNET_OK on success (including
389 * no ACL configured)
390 */
391static int
392process_acl4 (struct GNUNET_STRINGS_IPv4NetworkPolicy **ret,
393 struct GNUNET_SERVICE_Context *sctx,
394 const char *option)
395{
396 char *opt;
397
398 if (!GNUNET_CONFIGURATION_have_value (sctx->cfg, sctx->service_name, option))
399 {
400 *ret = NULL;
401 return GNUNET_OK;
402 }
403 GNUNET_break (GNUNET_OK ==
404 GNUNET_CONFIGURATION_get_value_string (sctx->cfg,
405 sctx->service_name,
406 option, &opt));
407 if (NULL == (*ret = GNUNET_STRINGS_parse_ipv4_policy (opt)))
408 {
409 LOG (GNUNET_ERROR_TYPE_WARNING,
410 _("Could not parse IPv4 network specification `%s' for `%s:%s'\n"),
411 opt, sctx->service_name, option);
412 GNUNET_free (opt);
413 return GNUNET_SYSERR;
414 }
415 GNUNET_free (opt);
416 return GNUNET_OK;
417}
418
419
420/**
421 * Parse an IPv6 access control list.
422 *
423 * @param ret location where to write the ACL (set)
424 * @param sctx service context to use to get the configuration
425 * @param option name of the ACL option to parse
426 * @return #GNUNET_SYSERR on parse error, #GNUNET_OK on success (including
427 * no ACL configured)
428 */
429static int
430process_acl6 (struct GNUNET_STRINGS_IPv6NetworkPolicy **ret,
431 struct GNUNET_SERVICE_Context *sctx,
432 const char *option)
433{
434 char *opt;
435
436 if (!GNUNET_CONFIGURATION_have_value (sctx->cfg, sctx->service_name, option))
437 {
438 *ret = NULL;
439 return GNUNET_OK;
440 }
441 GNUNET_break (GNUNET_OK ==
442 GNUNET_CONFIGURATION_get_value_string (sctx->cfg,
443 sctx->service_name,
444 option, &opt));
445 if (NULL == (*ret = GNUNET_STRINGS_parse_ipv6_policy (opt)))
446 {
447 LOG (GNUNET_ERROR_TYPE_WARNING,
448 _("Could not parse IPv6 network specification `%s' for `%s:%s'\n"),
449 opt, sctx->service_name, option);
450 GNUNET_free (opt);
451 return GNUNET_SYSERR;
452 }
453 GNUNET_free (opt);
454 return GNUNET_OK;
455}
456
457
458/**
459 * Add the given UNIX domain path as an address to the
460 * list (as the first entry).
461 *
462 * @param saddrs array to update
463 * @param saddrlens where to store the address length
464 * @param unixpath path to add
465 * @param abstract #GNUNET_YES to add an abstract UNIX domain socket. This
466 * parameter is ignore on systems other than LINUX
467 */
468static void
469add_unixpath (struct sockaddr **saddrs,
470 socklen_t *saddrlens,
471 const char *unixpath,
472 int abstract)
473{
474#ifdef AF_UNIX
475 struct sockaddr_un *un;
476
477 un = GNUNET_new (struct sockaddr_un);
478 un->sun_family = AF_UNIX;
479 strncpy (un->sun_path, unixpath, sizeof (un->sun_path) - 1);
480#ifdef LINUX
481 if (GNUNET_YES == abstract)
482 un->sun_path[0] = '\0';
483#endif
484#if HAVE_SOCKADDR_UN_SUN_LEN
485 un->sun_len = (u_char) sizeof (struct sockaddr_un);
486#endif
487 *saddrs = (struct sockaddr *) un;
488 *saddrlens = sizeof (struct sockaddr_un);
489#else
490 /* this function should never be called
491 * unless AF_UNIX is defined! */
492 GNUNET_assert (0);
493#endif
494}
495
496
497/**
498 * Get the list of addresses that a server for the given service
499 * should bind to.
500 *
501 * @param service_name name of the service
502 * @param cfg configuration (which specifies the addresses)
503 * @param addrs set (call by reference) to an array of pointers to the
504 * addresses the server should bind to and listen on; the
505 * array will be NULL-terminated (on success)
506 * @param addr_lens set (call by reference) to an array of the lengths
507 * of the respective `struct sockaddr` struct in the @a addrs
508 * array (on success)
509 * @return number of addresses found on success,
510 * #GNUNET_SYSERR if the configuration
511 * did not specify reasonable finding information or
512 * if it specified a hostname that could not be resolved;
513 * #GNUNET_NO if the number of addresses configured is
514 * zero (in this case, `*addrs` and `*addr_lens` will be
515 * set to NULL).
516 */
517int
518GNUNET_SERVICE_get_server_addresses (const char *service_name,
519 const struct GNUNET_CONFIGURATION_Handle *cfg,
520 struct sockaddr ***addrs,
521 socklen_t ** addr_lens)
522{
523 int disablev6;
524 struct GNUNET_NETWORK_Handle *desc;
525 unsigned long long port;
526 char *unixpath;
527 struct addrinfo hints;
528 struct addrinfo *res;
529 struct addrinfo *pos;
530 struct addrinfo *next;
531 unsigned int i;
532 int resi;
533 int ret;
534 int abstract;
535 struct sockaddr **saddrs;
536 socklen_t *saddrlens;
537 char *hostname;
538
539 *addrs = NULL;
540 *addr_lens = NULL;
541 desc = NULL;
542 if (GNUNET_CONFIGURATION_have_value (cfg, service_name, "DISABLEV6"))
543 {
544 if (GNUNET_SYSERR ==
545 (disablev6 =
546 GNUNET_CONFIGURATION_get_value_yesno (cfg, service_name, "DISABLEV6")))
547 return GNUNET_SYSERR;
548 }
549 else
550 disablev6 = GNUNET_NO;
551
552 if (! disablev6)
553 {
554 /* probe IPv6 support */
555 desc = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_STREAM, 0);
556 if (NULL == desc)
557 {
558 if ((ENOBUFS == errno) || (ENOMEM == errno) || (ENFILE == errno) ||
559 (EACCES == errno))
560 {
561 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "socket");
562 return GNUNET_SYSERR;
563 }
564 LOG (GNUNET_ERROR_TYPE_INFO,
565 _("Disabling IPv6 support for service `%s', failed to create IPv6 socket: %s\n"),
566 service_name, STRERROR (errno));
567 disablev6 = GNUNET_YES;
568 }
569 else
570 {
571 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
572 desc = NULL;
573 }
574 }
575
576 port = 0;
577 if (GNUNET_CONFIGURATION_have_value (cfg, service_name, "PORT"))
578 {
579 if (GNUNET_OK !=
580 GNUNET_CONFIGURATION_get_value_number (cfg, service_name,
581 "PORT", &port))
582 {
583 LOG (GNUNET_ERROR_TYPE_ERROR,
584 _("Require valid port number for service `%s' in configuration!\n"),
585 service_name);
586 }
587 if (port > 65535)
588 {
589 LOG (GNUNET_ERROR_TYPE_ERROR,
590 _("Require valid port number for service `%s' in configuration!\n"),
591 service_name);
592 return GNUNET_SYSERR;
593 }
594 }
595
596 if (GNUNET_CONFIGURATION_have_value (cfg, service_name, "BINDTO"))
597 {
598 GNUNET_break (GNUNET_OK ==
599 GNUNET_CONFIGURATION_get_value_string (cfg, service_name,
600 "BINDTO", &hostname));
601 }
602 else
603 hostname = NULL;
604
605 unixpath = NULL;
606 abstract = GNUNET_NO;
607#ifdef AF_UNIX
608 if ((GNUNET_YES ==
609 GNUNET_CONFIGURATION_have_value (cfg, service_name, "UNIXPATH")) &&
610 (GNUNET_OK ==
611 GNUNET_CONFIGURATION_get_value_filename (cfg, service_name, "UNIXPATH",
612 &unixpath)) &&
613 (0 < strlen (unixpath)))
614 {
615 /* probe UNIX support */
616 struct sockaddr_un s_un;
617
618 if (strlen (unixpath) >= sizeof (s_un.sun_path))
619 {
620 LOG (GNUNET_ERROR_TYPE_WARNING,
621 _("UNIXPATH `%s' too long, maximum length is %llu\n"), unixpath,
622 (unsigned long long) sizeof (s_un.sun_path));
623 unixpath = GNUNET_NETWORK_shorten_unixpath (unixpath);
624 LOG (GNUNET_ERROR_TYPE_INFO,
625 _("Using `%s' instead\n"),
626 unixpath);
627 }
628#ifdef LINUX
629 abstract = GNUNET_CONFIGURATION_get_value_yesno (cfg,
630 "TESTING",
631 "USE_ABSTRACT_SOCKETS");
632 if (GNUNET_SYSERR == abstract)
633 abstract = GNUNET_NO;
634#endif
635 if ((GNUNET_YES != abstract)
636 && (GNUNET_OK !=
637 GNUNET_DISK_directory_create_for_file (unixpath)))
638 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
639 "mkdir",
640 unixpath);
641 }
642 if (NULL != unixpath)
643 {
644 desc = GNUNET_NETWORK_socket_create (AF_UNIX, SOCK_STREAM, 0);
645 if (NULL == desc)
646 {
647 if ((ENOBUFS == errno) || (ENOMEM == errno) || (ENFILE == errno) ||
648 (EACCES == errno))
649 {
650 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "socket");
651 GNUNET_free_non_null (hostname);
652 GNUNET_free (unixpath);
653 return GNUNET_SYSERR;
654 }
655 LOG (GNUNET_ERROR_TYPE_INFO,
656 _("Disabling UNIX domain socket support for service `%s', failed to create UNIX domain socket: %s\n"),
657 service_name,
658 STRERROR (errno));
659 GNUNET_free (unixpath);
660 unixpath = NULL;
661 }
662 else
663 {
664 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
665 desc = NULL;
666 }
667 }
668#endif
669
670 if ((0 == port) && (NULL == unixpath))
671 {
672 LOG (GNUNET_ERROR_TYPE_ERROR,
673 _("Have neither PORT nor UNIXPATH for service `%s', but one is required\n"),
674 service_name);
675 GNUNET_free_non_null (hostname);
676 return GNUNET_SYSERR;
677 }
678 if (0 == port)
679 {
680 saddrs = GNUNET_malloc (2 * sizeof (struct sockaddr *));
681 saddrlens = GNUNET_malloc (2 * sizeof (socklen_t));
682 add_unixpath (saddrs, saddrlens, unixpath, abstract);
683 GNUNET_free_non_null (unixpath);
684 GNUNET_free_non_null (hostname);
685 *addrs = saddrs;
686 *addr_lens = saddrlens;
687 return 1;
688 }
689
690 if (NULL != hostname)
691 {
692 LOG (GNUNET_ERROR_TYPE_DEBUG,
693 "Resolving `%s' since that is where `%s' will bind to.\n",
694 hostname,
695 service_name);
696 memset (&hints, 0, sizeof (struct addrinfo));
697 if (disablev6)
698 hints.ai_family = AF_INET;
699 hints.ai_protocol = IPPROTO_TCP;
700 if ((0 != (ret = getaddrinfo (hostname, NULL, &hints, &res))) ||
701 (NULL == res))
702 {
703 LOG (GNUNET_ERROR_TYPE_ERROR,
704 _("Failed to resolve `%s': %s\n"),
705 hostname,
706 gai_strerror (ret));
707 GNUNET_free (hostname);
708 GNUNET_free_non_null (unixpath);
709 return GNUNET_SYSERR;
710 }
711 next = res;
712 i = 0;
713 while (NULL != (pos = next))
714 {
715 next = pos->ai_next;
716 if ((disablev6) && (pos->ai_family == AF_INET6))
717 continue;
718 i++;
719 }
720 if (0 == i)
721 {
722 LOG (GNUNET_ERROR_TYPE_ERROR,
723 _("Failed to find %saddress for `%s'.\n"),
724 disablev6 ? "IPv4 " : "",
725 hostname);
726 freeaddrinfo (res);
727 GNUNET_free (hostname);
728 GNUNET_free_non_null (unixpath);
729 return GNUNET_SYSERR;
730 }
731 resi = i;
732 if (NULL != unixpath)
733 resi++;
734 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
735 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
736 i = 0;
737 if (NULL != unixpath)
738 {
739 add_unixpath (saddrs, saddrlens, unixpath, abstract);
740 i++;
741 }
742 next = res;
743 while (NULL != (pos = next))
744 {
745 next = pos->ai_next;
746 if ((disablev6) && (AF_INET6 == pos->ai_family))
747 continue;
748 if ((IPPROTO_TCP != pos->ai_protocol) && (0 != pos->ai_protocol))
749 continue; /* not TCP */
750 if ((SOCK_STREAM != pos->ai_socktype) && (0 != pos->ai_socktype))
751 continue; /* huh? */
752 LOG (GNUNET_ERROR_TYPE_DEBUG, "Service `%s' will bind to `%s'\n",
753 service_name, GNUNET_a2s (pos->ai_addr, pos->ai_addrlen));
754 if (AF_INET == pos->ai_family)
755 {
756 GNUNET_assert (sizeof (struct sockaddr_in) == pos->ai_addrlen);
757 saddrlens[i] = pos->ai_addrlen;
758 saddrs[i] = GNUNET_malloc (saddrlens[i]);
759 GNUNET_memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
760 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
761 }
762 else
763 {
764 GNUNET_assert (AF_INET6 == pos->ai_family);
765 GNUNET_assert (sizeof (struct sockaddr_in6) == pos->ai_addrlen);
766 saddrlens[i] = pos->ai_addrlen;
767 saddrs[i] = GNUNET_malloc (saddrlens[i]);
768 GNUNET_memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
769 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
770 }
771 i++;
772 }
773 GNUNET_free (hostname);
774 freeaddrinfo (res);
775 resi = i;
776 }
777 else
778 {
779 /* will bind against everything, just set port */
780 if (disablev6)
781 {
782 /* V4-only */
783 resi = 1;
784 if (NULL != unixpath)
785 resi++;
786 i = 0;
787 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
788 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
789 if (NULL != unixpath)
790 {
791 add_unixpath (saddrs, saddrlens, unixpath, abstract);
792 i++;
793 }
794 saddrlens[i] = sizeof (struct sockaddr_in);
795 saddrs[i] = GNUNET_malloc (saddrlens[i]);
796#if HAVE_SOCKADDR_IN_SIN_LEN
797 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[i];
798#endif
799 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
800 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
801 }
802 else
803 {
804 /* dual stack */
805 resi = 2;
806 if (NULL != unixpath)
807 resi++;
808 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
809 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
810 i = 0;
811 if (NULL != unixpath)
812 {
813 add_unixpath (saddrs, saddrlens, unixpath, abstract);
814 i++;
815 }
816 saddrlens[i] = sizeof (struct sockaddr_in6);
817 saddrs[i] = GNUNET_malloc (saddrlens[i]);
818#if HAVE_SOCKADDR_IN_SIN_LEN
819 ((struct sockaddr_in6 *) saddrs[i])->sin6_len = saddrlens[0];
820#endif
821 ((struct sockaddr_in6 *) saddrs[i])->sin6_family = AF_INET6;
822 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
823 i++;
824 saddrlens[i] = sizeof (struct sockaddr_in);
825 saddrs[i] = GNUNET_malloc (saddrlens[i]);
826#if HAVE_SOCKADDR_IN_SIN_LEN
827 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[1];
828#endif
829 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
830 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
831 }
832 }
833 GNUNET_free_non_null (unixpath);
834 *addrs = saddrs;
835 *addr_lens = saddrlens;
836 return resi;
837}
838
839
840#ifdef MINGW
841/**
842 * Read listen sockets from the parent process (ARM).
843 *
844 * @param sctx service context to initialize
845 * @return #GNUNET_YES if ok, #GNUNET_NO if not ok (must bind yourself),
846 * and #GNUNET_SYSERR on error.
847 */
848static int
849receive_sockets_from_parent (struct GNUNET_SERVICE_Context *sctx)
850{
851 const char *env_buf;
852 int fail;
853 uint64_t count;
854 uint64_t i;
855 HANDLE lsocks_pipe;
856
857 env_buf = getenv ("GNUNET_OS_READ_LSOCKS");
858 if ((NULL == env_buf) || (strlen (env_buf) <= 0))
859 return GNUNET_NO;
860 /* Using W32 API directly here, because this pipe will
861 * never be used outside of this function, and it's just too much of a bother
862 * to create a GNUnet API that boxes a HANDLE (the way it is done with socks)
863 */
864 lsocks_pipe = (HANDLE) strtoul (env_buf, NULL, 10);
865 if ( (0 == lsocks_pipe) || (INVALID_HANDLE_VALUE == lsocks_pipe))
866 return GNUNET_NO;
867 fail = 1;
868 do
869 {
870 int ret;
871 int fail2;
872 DWORD rd;
873
874 ret = ReadFile (lsocks_pipe, &count, sizeof (count), &rd, NULL);
875 if ((0 == ret) || (sizeof (count) != rd) || (0 == count))
876 break;
877 sctx->lsocks =
878 GNUNET_malloc (sizeof (struct GNUNET_NETWORK_Handle *) * (count + 1));
879
880 fail2 = 1;
881 for (i = 0; i < count; i++)
882 {
883 WSAPROTOCOL_INFOA pi;
884 uint64_t size;
885 SOCKET s;
886
887 ret = ReadFile (lsocks_pipe, &size, sizeof (size), &rd, NULL);
888 if ( (0 == ret) || (sizeof (size) != rd) || (sizeof (pi) != size) )
889 break;
890 ret = ReadFile (lsocks_pipe, &pi, sizeof (pi), &rd, NULL);
891 if ( (0 == ret) || (sizeof (pi) != rd))
892 break;
893 s = WSASocketA (pi.iAddressFamily, pi.iSocketType, pi.iProtocol, &pi, 0, WSA_FLAG_OVERLAPPED);
894 sctx->lsocks[i] = GNUNET_NETWORK_socket_box_native (s);
895 if (NULL == sctx->lsocks[i])
896 break;
897 else if (i == count - 1)
898 fail2 = 0;
899 }
900 if (fail2)
901 break;
902 sctx->lsocks[count] = NULL;
903 fail = 0;
904 }
905 while (fail);
906
907 CloseHandle (lsocks_pipe);
908
909 if (fail)
910 {
911 LOG (GNUNET_ERROR_TYPE_ERROR,
912 _("Could not access a pre-bound socket, will try to bind myself\n"));
913 for (i = 0; (i < count) && (NULL != sctx->lsocks[i]); i++)
914 GNUNET_break (0 == GNUNET_NETWORK_socket_close (sctx->lsocks[i]));
915 GNUNET_free_non_null (sctx->lsocks);
916 sctx->lsocks = NULL;
917 return GNUNET_NO;
918 }
919 return GNUNET_YES;
920}
921#endif
922
923
924/**
925 * Setup addr, addrlen, idle_timeout
926 * based on configuration!
927 *
928 * Configuration may specify:
929 * - PORT (where to bind to for TCP)
930 * - UNIXPATH (where to bind to for UNIX domain sockets)
931 * - TIMEOUT (after how many ms does an inactive service timeout);
932 * - DISABLEV6 (disable support for IPv6, otherwise we use dual-stack)
933 * - BINDTO (hostname or IP address to bind to, otherwise we take everything)
934 * - ACCEPT_FROM (only allow connections from specified IPv4 subnets)
935 * - ACCEPT_FROM6 (only allow connections from specified IPv6 subnets)
936 * - REJECT_FROM (disallow allow connections from specified IPv4 subnets)
937 * - REJECT_FROM6 (disallow allow connections from specified IPv6 subnets)
938 *
939 * @param sctx service context to initialize
940 * @return #GNUNET_OK if configuration succeeded
941 */
942static int
943setup_service (struct GNUNET_SERVICE_Context *sctx)
944{
945 struct GNUNET_TIME_Relative idleout;
946 int tolerant;
947
948#ifndef MINGW
949 const char *nfds;
950 unsigned int cnt;
951 int flags;
952#endif
953
954 if (GNUNET_CONFIGURATION_have_value (sctx->cfg, sctx->service_name, "TIMEOUT"))
955 {
956 if (GNUNET_OK !=
957 GNUNET_CONFIGURATION_get_value_time (sctx->cfg, sctx->service_name,
958 "TIMEOUT", &idleout))
959 {
960 LOG (GNUNET_ERROR_TYPE_ERROR,
961 _("Specified value for `%s' of service `%s' is invalid\n"),
962 "TIMEOUT", sctx->service_name);
963 return GNUNET_SYSERR;
964 }
965 sctx->timeout = idleout;
966 }
967 else
968 sctx->timeout = GNUNET_TIME_UNIT_FOREVER_REL;
969
970 if (GNUNET_CONFIGURATION_have_value
971 (sctx->cfg, sctx->service_name, "TOLERANT"))
972 {
973 if (GNUNET_SYSERR ==
974 (tolerant =
975 GNUNET_CONFIGURATION_get_value_yesno (sctx->cfg, sctx->service_name,
976 "TOLERANT")))
977 {
978 LOG (GNUNET_ERROR_TYPE_ERROR,
979 _("Specified value for `%s' of service `%s' is invalid\n"),
980 "TOLERANT", sctx->service_name);
981 return GNUNET_SYSERR;
982 }
983 }
984 else
985 tolerant = GNUNET_NO;
986
987#ifndef MINGW
988 errno = 0;
989 if ((NULL != (nfds = getenv ("LISTEN_FDS"))) &&
990 (1 == SSCANF (nfds, "%u", &cnt)) && (cnt > 0) && (cnt < FD_SETSIZE) &&
991 (cnt + 4 < FD_SETSIZE))
992 {
993 sctx->lsocks =
994 GNUNET_malloc (sizeof (struct GNUNET_NETWORK_Handle *) * (cnt + 1));
995 while (0 < cnt--)
996 {
997 flags = fcntl (3 + cnt, F_GETFD);
998 if ((flags < 0) || (0 != (flags & FD_CLOEXEC)) ||
999 (NULL ==
1000 (sctx->lsocks[cnt] = GNUNET_NETWORK_socket_box_native (3 + cnt))))
1001 {
1002 LOG (GNUNET_ERROR_TYPE_ERROR,
1003 _
1004 ("Could not access pre-bound socket %u, will try to bind myself\n"),
1005 (unsigned int) 3 + cnt);
1006 cnt++;
1007 while (sctx->lsocks[cnt] != NULL)
1008 GNUNET_break (0 == GNUNET_NETWORK_socket_close (sctx->lsocks[cnt++]));
1009 GNUNET_free (sctx->lsocks);
1010 sctx->lsocks = NULL;
1011 break;
1012 }
1013 }
1014 unsetenv ("LISTEN_FDS");
1015 }
1016#else
1017 if (getenv ("GNUNET_OS_READ_LSOCKS") != NULL)
1018 {
1019 receive_sockets_from_parent (sctx);
1020 putenv ("GNUNET_OS_READ_LSOCKS=");
1021 }
1022#endif
1023
1024 if ((NULL == sctx->lsocks) &&
1025 (GNUNET_SYSERR ==
1026 GNUNET_SERVICE_get_server_addresses (sctx->service_name, sctx->cfg,
1027 &sctx->addrs, &sctx->addrlens)))
1028 return GNUNET_SYSERR;
1029 sctx->require_found = tolerant ? GNUNET_NO : GNUNET_YES;
1030 sctx->match_uid =
1031 GNUNET_CONFIGURATION_get_value_yesno (sctx->cfg, sctx->service_name,
1032 "UNIX_MATCH_UID");
1033 sctx->match_gid =
1034 GNUNET_CONFIGURATION_get_value_yesno (sctx->cfg, sctx->service_name,
1035 "UNIX_MATCH_GID");
1036 process_acl4 (&sctx->v4_denied, sctx, "REJECT_FROM");
1037 process_acl4 (&sctx->v4_allowed, sctx, "ACCEPT_FROM");
1038 process_acl6 (&sctx->v6_denied, sctx, "REJECT_FROM6");
1039 process_acl6 (&sctx->v6_allowed, sctx, "ACCEPT_FROM6");
1040
1041 return GNUNET_OK;
1042}
1043
1044
1045/**
1046 * Get the name of the user that'll be used
1047 * to provide the service.
1048 *
1049 * @param sctx service context
1050 * @return value of the 'USERNAME' option
1051 */
1052static char *
1053get_user_name (struct GNUNET_SERVICE_Context *sctx)
1054{
1055 char *un;
1056
1057 if (GNUNET_OK !=
1058 GNUNET_CONFIGURATION_get_value_filename (sctx->cfg, sctx->service_name,
1059 "USERNAME", &un))
1060 return NULL;
1061 return un;
1062}
1063
1064
1065/**
1066 * Write PID file.
1067 *
1068 * @param sctx service context
1069 * @param pid PID to write (should be equal to 'getpid()'
1070 * @return #GNUNET_OK on success (including no work to be done)
1071 */
1072static int
1073write_pid_file (struct GNUNET_SERVICE_Context *sctx, pid_t pid)
1074{
1075 FILE *pidfd;
1076 char *pif;
1077 char *user;
1078 char *rdir;
1079 int len;
1080
1081 if (NULL == (pif = get_pid_file_name (sctx)))
1082 return GNUNET_OK; /* no file desired */
1083 user = get_user_name (sctx);
1084 rdir = GNUNET_strdup (pif);
1085 len = strlen (rdir);
1086 while ((len > 0) && (rdir[len] != DIR_SEPARATOR))
1087 len--;
1088 rdir[len] = '\0';
1089 if (0 != ACCESS (rdir, F_OK))
1090 {
1091 /* we get to create a directory -- and claim it
1092 * as ours! */
1093 (void) GNUNET_DISK_directory_create (rdir);
1094 if ((NULL != user) && (0 < strlen (user)))
1095 GNUNET_DISK_file_change_owner (rdir, user);
1096 }
1097 if (0 != ACCESS (rdir, W_OK | X_OK))
1098 {
1099 LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_ERROR, "access", rdir);
1100 GNUNET_free (rdir);
1101 GNUNET_free_non_null (user);
1102 GNUNET_free (pif);
1103 return GNUNET_SYSERR;
1104 }
1105 GNUNET_free (rdir);
1106 pidfd = FOPEN (pif, "w");
1107 if (NULL == pidfd)
1108 {
1109 LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_ERROR, "fopen", pif);
1110 GNUNET_free (pif);
1111 GNUNET_free_non_null (user);
1112 return GNUNET_SYSERR;
1113 }
1114 if (0 > FPRINTF (pidfd, "%u", pid))
1115 LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "fprintf", pif);
1116 GNUNET_break (0 == FCLOSE (pidfd));
1117 if ((NULL != user) && (0 < strlen (user)))
1118 GNUNET_DISK_file_change_owner (pif, user);
1119 GNUNET_free_non_null (user);
1120 GNUNET_free (pif);
1121 return GNUNET_OK;
1122}
1123
1124
1125/**
1126 * Task run during shutdown. Stops the server/service.
1127 *
1128 * @param cls the `struct GNUNET_SERVICE_Context`
1129 */
1130static void
1131shutdown_task (void *cls)
1132{
1133 struct GNUNET_SERVICE_Context *service = cls;
1134 struct GNUNET_SERVER_Handle *server = service->server;
1135
1136 service->shutdown_task = NULL;
1137 if (0 != (service->options & GNUNET_SERVICE_OPTION_SOFT_SHUTDOWN))
1138 GNUNET_SERVER_stop_listening (server);
1139 else
1140 GNUNET_SERVER_destroy (server);
1141}
1142
1143
1144/**
1145 * Initial task for the service.
1146 *
1147 * @param cls service context
1148 */
1149static void
1150service_task (void *cls)
1151{
1152 struct GNUNET_SERVICE_Context *sctx = cls;
1153 unsigned int i;
1154
1155 (void) GNUNET_SPEEDUP_start_ (sctx->cfg);
1156 GNUNET_RESOLVER_connect (sctx->cfg);
1157 if (NULL != sctx->lsocks)
1158 sctx->server
1159 = GNUNET_SERVER_create_with_sockets (&check_access, sctx, sctx->lsocks,
1160 sctx->timeout, sctx->require_found);
1161 else
1162 sctx->server
1163 = GNUNET_SERVER_create (&check_access, sctx, sctx->addrs, sctx->addrlens,
1164 sctx->timeout, sctx->require_found);
1165 if (NULL == sctx->server)
1166 {
1167 if (NULL != sctx->addrs)
1168 for (i = 0; NULL != sctx->addrs[i]; i++)
1169 LOG (GNUNET_ERROR_TYPE_INFO,
1170 _("Failed to start `%s' at `%s'\n"),
1171 sctx->service_name, GNUNET_a2s (sctx->addrs[i], sctx->addrlens[i]));
1172 sctx->ret = GNUNET_SYSERR;
1173 return;
1174 }
1175#ifndef WINDOWS
1176 if (NULL != sctx->addrs)
1177 for (i = 0; NULL != sctx->addrs[i]; i++)
1178 if ((AF_UNIX == sctx->addrs[i]->sa_family)
1179 && ('\0' != ((const struct sockaddr_un *)sctx->addrs[i])->sun_path[0]))
1180 GNUNET_DISK_fix_permissions (((const struct sockaddr_un *)sctx->addrs[i])->sun_path,
1181 sctx->match_uid,
1182 sctx->match_gid);
1183#endif
1184
1185
1186 if (0 == (sctx->options & GNUNET_SERVICE_OPTION_MANUAL_SHUTDOWN))
1187 {
1188 /* install a task that will kill the server
1189 * process if the scheduler ever gets a shutdown signal */
1190 sctx->shutdown_task = GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
1191 sctx);
1192 }
1193 sctx->my_handlers = GNUNET_malloc (sizeof (defhandlers));
1194 GNUNET_memcpy (sctx->my_handlers, defhandlers, sizeof (defhandlers));
1195 i = 0;
1196 while (NULL != sctx->my_handlers[i].callback)
1197 sctx->my_handlers[i++].callback_cls = sctx;
1198 GNUNET_SERVER_add_handlers (sctx->server, sctx->my_handlers);
1199 if (-1 != sctx->ready_confirm_fd)
1200 {
1201 GNUNET_break (1 == WRITE (sctx->ready_confirm_fd, ".", 1));
1202 GNUNET_break (0 == CLOSE (sctx->ready_confirm_fd));
1203 sctx->ready_confirm_fd = -1;
1204 write_pid_file (sctx, getpid ());
1205 }
1206 if (NULL != sctx->addrs)
1207 {
1208 i = 0;
1209 while (NULL != sctx->addrs[i])
1210 {
1211 LOG (GNUNET_ERROR_TYPE_INFO, _("Service `%s' runs at %s\n"),
1212 sctx->service_name, GNUNET_a2s (sctx->addrs[i], sctx->addrlens[i]));
1213 i++;
1214 }
1215 }
1216 sctx->task (sctx->task_cls, sctx->server, sctx->cfg);
1217}
1218
1219
1220/**
1221 * Detach from terminal.
1222 *
1223 * @param sctx service context
1224 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
1225 */
1226static int
1227detach_terminal (struct GNUNET_SERVICE_Context *sctx)
1228{
1229#ifndef MINGW
1230 pid_t pid;
1231 int nullfd;
1232 int filedes[2];
1233
1234 if (0 != PIPE (filedes))
1235 {
1236 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "pipe");
1237 return GNUNET_SYSERR;
1238 }
1239 pid = fork ();
1240 if (pid < 0)
1241 {
1242 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "fork");
1243 return GNUNET_SYSERR;
1244 }
1245 if (0 != pid)
1246 {
1247 /* Parent */
1248 char c;
1249
1250 GNUNET_break (0 == CLOSE (filedes[1]));
1251 c = 'X';
1252 if (1 != READ (filedes[0], &c, sizeof (char)))
1253 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "read");
1254 fflush (stdout);
1255 switch (c)
1256 {
1257 case '.':
1258 exit (0);
1259 case 'I':
1260 LOG (GNUNET_ERROR_TYPE_INFO, _("Service process failed to initialize\n"));
1261 break;
1262 case 'S':
1263 LOG (GNUNET_ERROR_TYPE_INFO,
1264 _("Service process could not initialize server function\n"));
1265 break;
1266 case 'X':
1267 LOG (GNUNET_ERROR_TYPE_INFO,
1268 _("Service process failed to report status\n"));
1269 break;
1270 }
1271 exit (1); /* child reported error */
1272 }
1273 GNUNET_break (0 == CLOSE (0));
1274 GNUNET_break (0 == CLOSE (1));
1275 GNUNET_break (0 == CLOSE (filedes[0]));
1276 nullfd = OPEN ("/dev/null", O_RDWR | O_APPEND);
1277 if (nullfd < 0)
1278 return GNUNET_SYSERR;
1279 /* set stdin/stdout to /dev/null */
1280 if ((dup2 (nullfd, 0) < 0) || (dup2 (nullfd, 1) < 0))
1281 {
1282 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "dup2");
1283 (void) CLOSE (nullfd);
1284 return GNUNET_SYSERR;
1285 }
1286 (void) CLOSE (nullfd);
1287 /* Detach from controlling terminal */
1288 pid = setsid ();
1289 if (-1 == pid)
1290 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "setsid");
1291 sctx->ready_confirm_fd = filedes[1];
1292#else
1293 /* FIXME: we probably need to do something else
1294 * elsewhere in order to fork the process itself... */
1295 FreeConsole ();
1296#endif
1297 return GNUNET_OK;
1298}
1299
1300
1301/**
1302 * Set user ID.
1303 *
1304 * @param sctx service context
1305 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
1306 */
1307static int
1308set_user_id (struct GNUNET_SERVICE_Context *sctx)
1309{
1310 char *user;
1311
1312 if (NULL == (user = get_user_name (sctx)))
1313 return GNUNET_OK; /* keep */
1314#ifndef MINGW
1315 struct passwd *pws;
1316
1317 errno = 0;
1318 pws = getpwnam (user);
1319 if (NULL == pws)
1320 {
1321 LOG (GNUNET_ERROR_TYPE_ERROR,
1322 _("Cannot obtain information about user `%s': %s\n"), user,
1323 errno == 0 ? _("No such user") : STRERROR (errno));
1324 GNUNET_free (user);
1325 return GNUNET_SYSERR;
1326 }
1327 if ((0 != setgid (pws->pw_gid)) || (0 != setegid (pws->pw_gid)) ||
1328#if HAVE_INITGROUPS
1329 (0 != initgroups (user, pws->pw_gid)) ||
1330#endif
1331 (0 != setuid (pws->pw_uid)) || (0 != seteuid (pws->pw_uid)))
1332 {
1333 if ((0 != setregid (pws->pw_gid, pws->pw_gid)) ||
1334 (0 != setreuid (pws->pw_uid, pws->pw_uid)))
1335 {
1336 LOG (GNUNET_ERROR_TYPE_ERROR, _("Cannot change user/group to `%s': %s\n"),
1337 user, STRERROR (errno));
1338 GNUNET_free (user);
1339 return GNUNET_SYSERR;
1340 }
1341 }
1342#endif
1343 GNUNET_free (user);
1344 return GNUNET_OK;
1345}
1346
1347
1348/**
1349 * Delete the PID file that was created by our parent.
1350 *
1351 * @param sctx service context
1352 */
1353static void
1354pid_file_delete (struct GNUNET_SERVICE_Context *sctx)
1355{
1356 char *pif = get_pid_file_name (sctx);
1357
1358 if (NULL == pif)
1359 return; /* no PID file */
1360 if (0 != UNLINK (pif))
1361 LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "unlink", pif);
1362 GNUNET_free (pif);
1363}
1364
1365
1366/**
1367 * Run a standard GNUnet service startup sequence (initialize loggers
1368 * and configuration, parse options).
1369 *
1370 * @param argc number of command line arguments
1371 * @param argv command line arguments
1372 * @param service_name our service name
1373 * @param options service options
1374 * @param task main task of the service
1375 * @param task_cls closure for @a task
1376 * @return #GNUNET_SYSERR on error, #GNUNET_OK
1377 * if we shutdown nicely
1378 */
1379int
1380GNUNET_SERVICE_run (int argc, char *const *argv,
1381 const char *service_name,
1382 enum GNUNET_SERVICE_Options options,
1383 GNUNET_SERVICE_Main task,
1384 void *task_cls)
1385{
1386#define HANDLE_ERROR do { GNUNET_break (0); goto shutdown; } while (0)
1387
1388 int err;
1389 int ret;
1390 char *cfg_fn;
1391 char *opt_cfg_fn;
1392 char *loglev;
1393 char *logfile;
1394 int do_daemonize;
1395 unsigned int i;
1396 unsigned long long skew_offset;
1397 unsigned long long skew_variance;
1398 long long clock_offset;
1399 struct GNUNET_SERVICE_Context sctx;
1400 struct GNUNET_CONFIGURATION_Handle *cfg;
1401 const char *xdg;
1402
1403 struct GNUNET_GETOPT_CommandLineOption service_options[] = {
1404 GNUNET_GETOPT_OPTION_CFG_FILE (&opt_cfg_fn),
1405 {'d', "daemonize", NULL,
1406 gettext_noop ("do daemonize (detach from terminal)"), 0,
1407 GNUNET_GETOPT_set_one, &do_daemonize},
1408 GNUNET_GETOPT_OPTION_HELP (NULL),
1409 GNUNET_GETOPT_OPTION_LOGLEVEL (&loglev),
1410 GNUNET_GETOPT_OPTION_LOGFILE (&logfile),
1411 GNUNET_GETOPT_OPTION_VERSION (PACKAGE_VERSION " " VCS_VERSION),
1412 GNUNET_GETOPT_OPTION_END
1413 };
1414 err = 1;
1415 do_daemonize = 0;
1416 logfile = NULL;
1417 loglev = NULL;
1418 opt_cfg_fn = NULL;
1419 xdg = getenv ("XDG_CONFIG_HOME");
1420 if (NULL != xdg)
1421 GNUNET_asprintf (&cfg_fn,
1422 "%s%s%s",
1423 xdg,
1424 DIR_SEPARATOR_STR,
1425 GNUNET_OS_project_data_get ()->config_file);
1426 else
1427 cfg_fn = GNUNET_strdup (GNUNET_OS_project_data_get ()->user_config_file);
1428 memset (&sctx, 0, sizeof (sctx));
1429 sctx.options = options;
1430 sctx.ready_confirm_fd = -1;
1431 sctx.ret = GNUNET_OK;
1432 sctx.timeout = GNUNET_TIME_UNIT_FOREVER_REL;
1433 sctx.task = task;
1434 sctx.task_cls = task_cls;
1435 sctx.service_name = service_name;
1436 sctx.cfg = cfg = GNUNET_CONFIGURATION_create ();
1437
1438 /* setup subsystems */
1439 ret = GNUNET_GETOPT_run (service_name, service_options, argc, argv);
1440 if (GNUNET_SYSERR == ret)
1441 goto shutdown;
1442 if (GNUNET_NO == ret)
1443 {
1444 err = 0;
1445 goto shutdown;
1446 }
1447 if (GNUNET_OK != GNUNET_log_setup (service_name, loglev, logfile))
1448 HANDLE_ERROR;
1449 if (NULL == opt_cfg_fn)
1450 opt_cfg_fn = GNUNET_strdup (cfg_fn);
1451 if (GNUNET_YES == GNUNET_DISK_file_test (opt_cfg_fn))
1452 {
1453 if (GNUNET_SYSERR == GNUNET_CONFIGURATION_load (cfg, opt_cfg_fn))
1454 {
1455 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1456 _("Malformed configuration file `%s', exit ...\n"),
1457 opt_cfg_fn);
1458 goto shutdown;
1459 }
1460 }
1461 else
1462 {
1463 if (GNUNET_SYSERR == GNUNET_CONFIGURATION_load (cfg, NULL))
1464 {
1465 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1466 _("Malformed configuration, exit ...\n"));
1467 goto shutdown;
1468 }
1469 if (0 != strcmp (opt_cfg_fn, cfg_fn))
1470 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1471 _("Could not access configuration file `%s'\n"),
1472 opt_cfg_fn);
1473 }
1474 if (GNUNET_OK != setup_service (&sctx))
1475 goto shutdown;
1476 if ((1 == do_daemonize) && (GNUNET_OK != detach_terminal (&sctx)))
1477 HANDLE_ERROR;
1478 if (GNUNET_OK != set_user_id (&sctx))
1479 goto shutdown;
1480 LOG (GNUNET_ERROR_TYPE_DEBUG,
1481 "Service `%s' runs with configuration from `%s'\n",
1482 service_name,
1483 opt_cfg_fn);
1484 if ((GNUNET_OK ==
1485 GNUNET_CONFIGURATION_get_value_number (sctx.cfg, "TESTING",
1486 "SKEW_OFFSET", &skew_offset)) &&
1487 (GNUNET_OK ==
1488 GNUNET_CONFIGURATION_get_value_number (sctx.cfg, "TESTING",
1489 "SKEW_VARIANCE", &skew_variance)))
1490 {
1491 clock_offset = skew_offset - skew_variance;
1492 GNUNET_TIME_set_offset (clock_offset);
1493 LOG (GNUNET_ERROR_TYPE_DEBUG, "Skewing clock by %dll ms\n", clock_offset);
1494 }
1495 /* actually run service */
1496 err = 0;
1497 GNUNET_SCHEDULER_run (&service_task, &sctx);
1498 /* shutdown */
1499 if ((1 == do_daemonize) && (NULL != sctx.server))
1500 pid_file_delete (&sctx);
1501 GNUNET_free_non_null (sctx.my_handlers);
1502
1503shutdown:
1504 if (-1 != sctx.ready_confirm_fd)
1505 {
1506 if (1 != WRITE (sctx.ready_confirm_fd, err ? "I" : "S", 1))
1507 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "write");
1508 GNUNET_break (0 == CLOSE (sctx.ready_confirm_fd));
1509 }
1510#if HAVE_MALLINFO
1511 {
1512 char *counter;
1513
1514 if ( (GNUNET_YES ==
1515 GNUNET_CONFIGURATION_have_value (sctx.cfg, service_name,
1516 "GAUGER_HEAP")) &&
1517 (GNUNET_OK ==
1518 GNUNET_CONFIGURATION_get_value_string (sctx.cfg, service_name,
1519 "GAUGER_HEAP",
1520 &counter)) )
1521 {
1522 struct mallinfo mi;
1523
1524 mi = mallinfo ();
1525 GAUGER (service_name, counter, mi.usmblks, "blocks");
1526 GNUNET_free (counter);
1527 }
1528 }
1529#endif
1530 GNUNET_SPEEDUP_stop_ ();
1531 GNUNET_CONFIGURATION_destroy (cfg);
1532 i = 0;
1533 if (NULL != sctx.addrs)
1534 while (NULL != sctx.addrs[i])
1535 GNUNET_free (sctx.addrs[i++]);
1536 GNUNET_free_non_null (sctx.addrs);
1537 GNUNET_free_non_null (sctx.addrlens);
1538 GNUNET_free_non_null (logfile);
1539 GNUNET_free_non_null (loglev);
1540 GNUNET_free (cfg_fn);
1541 GNUNET_free_non_null (opt_cfg_fn);
1542 GNUNET_free_non_null (sctx.v4_denied);
1543 GNUNET_free_non_null (sctx.v6_denied);
1544 GNUNET_free_non_null (sctx.v4_allowed);
1545 GNUNET_free_non_null (sctx.v6_allowed);
1546
1547 return err ? GNUNET_SYSERR : sctx.ret;
1548}
1549
1550
1551/**
1552 * Run a service startup sequence within an existing
1553 * initialized system.
1554 *
1555 * @param service_name our service name
1556 * @param cfg configuration to use
1557 * @param options service options
1558 * @return NULL on error, service handle
1559 */
1560struct GNUNET_SERVICE_Context *
1561GNUNET_SERVICE_start (const char *service_name,
1562 const struct GNUNET_CONFIGURATION_Handle *cfg,
1563 enum GNUNET_SERVICE_Options options)
1564{
1565 int i;
1566 struct GNUNET_SERVICE_Context *sctx;
1567
1568 sctx = GNUNET_new (struct GNUNET_SERVICE_Context);
1569 sctx->ready_confirm_fd = -1; /* no daemonizing */
1570 sctx->ret = GNUNET_OK;
1571 sctx->timeout = GNUNET_TIME_UNIT_FOREVER_REL;
1572 sctx->service_name = service_name;
1573 sctx->cfg = cfg;
1574 sctx->options = options;
1575
1576 /* setup subsystems */
1577 if (GNUNET_OK != setup_service (sctx))
1578 {
1579 GNUNET_SERVICE_stop (sctx);
1580 return NULL;
1581 }
1582 if (NULL != sctx->lsocks)
1583 sctx->server =
1584 GNUNET_SERVER_create_with_sockets (&check_access, sctx, sctx->lsocks,
1585 sctx->timeout, sctx->require_found);
1586 else
1587 sctx->server =
1588 GNUNET_SERVER_create (&check_access, sctx, sctx->addrs, sctx->addrlens,
1589 sctx->timeout, sctx->require_found);
1590
1591 if (NULL == sctx->server)
1592 {
1593 GNUNET_SERVICE_stop (sctx);
1594 return NULL;
1595 }
1596#ifndef WINDOWS
1597 if (NULL != sctx->addrs)
1598 for (i = 0; NULL != sctx->addrs[i]; i++)
1599 if ((AF_UNIX == sctx->addrs[i]->sa_family)
1600 && ('\0' != ((const struct sockaddr_un *)sctx->addrs[i])->sun_path[0]))
1601 GNUNET_DISK_fix_permissions (((const struct sockaddr_un *)sctx->addrs[i])->sun_path,
1602 sctx->match_uid,
1603 sctx->match_gid);
1604#endif
1605 sctx->my_handlers = GNUNET_malloc (sizeof (defhandlers));
1606 GNUNET_memcpy (sctx->my_handlers, defhandlers, sizeof (defhandlers));
1607 i = 0;
1608 while ((sctx->my_handlers[i].callback != NULL))
1609 sctx->my_handlers[i++].callback_cls = sctx;
1610 GNUNET_SERVER_add_handlers (sctx->server, sctx->my_handlers);
1611 return sctx;
1612}
1613
1614
1615/**
1616 * Obtain the server used by a service. Note that the server must NOT
1617 * be destroyed by the caller.
1618 *
1619 * @param ctx the service context returned from the start function
1620 * @return handle to the server for this service, NULL if there is none
1621 */
1622struct GNUNET_SERVER_Handle *
1623GNUNET_SERVICE_get_server (struct GNUNET_SERVICE_Context *ctx)
1624{
1625 return ctx->server;
1626}
1627
1628
1629/**
1630 * Get the NULL-terminated array of listen sockets for this service.
1631 *
1632 * @param ctx service context to query
1633 * @return NULL if there are no listen sockets, otherwise NULL-terminated
1634 * array of listen sockets.
1635 */
1636struct GNUNET_NETWORK_Handle *const*
1637GNUNET_SERVICE_get_listen_sockets (struct GNUNET_SERVICE_Context *ctx)
1638{
1639 return ctx->lsocks;
1640}
1641
1642
1643/**
1644 * Stop a service that was started with "GNUNET_SERVICE_start".
1645 *
1646 * @param sctx the service context returned from the start function
1647 */
1648void
1649GNUNET_SERVICE_stop (struct GNUNET_SERVICE_Context *sctx)
1650{
1651 unsigned int i;
1652
1653#if HAVE_MALLINFO
1654 {
1655 char *counter;
1656
1657 if ( (GNUNET_YES ==
1658 GNUNET_CONFIGURATION_have_value (sctx->cfg, sctx->service_name,
1659 "GAUGER_HEAP")) &&
1660 (GNUNET_OK ==
1661 GNUNET_CONFIGURATION_get_value_string (sctx->cfg, sctx->service_name,
1662 "GAUGER_HEAP",
1663 &counter)) )
1664 {
1665 struct mallinfo mi;
1666
1667 mi = mallinfo ();
1668 GAUGER (sctx->service_name, counter, mi.usmblks, "blocks");
1669 GNUNET_free (counter);
1670 }
1671 }
1672#endif
1673 if (NULL != sctx->shutdown_task)
1674 {
1675 GNUNET_SCHEDULER_cancel (sctx->shutdown_task);
1676 sctx->shutdown_task = NULL;
1677 }
1678 if (NULL != sctx->server)
1679 GNUNET_SERVER_destroy (sctx->server);
1680 GNUNET_free_non_null (sctx->my_handlers);
1681 if (NULL != sctx->addrs)
1682 {
1683 i = 0;
1684 while (NULL != sctx->addrs[i])
1685 GNUNET_free (sctx->addrs[i++]);
1686 GNUNET_free (sctx->addrs);
1687 }
1688 GNUNET_free_non_null (sctx->addrlens);
1689 GNUNET_free_non_null (sctx->v4_denied);
1690 GNUNET_free_non_null (sctx->v6_denied);
1691 GNUNET_free_non_null (sctx->v4_allowed);
1692 GNUNET_free_non_null (sctx->v6_allowed);
1693 GNUNET_free (sctx);
1694}
1695
1696
1697/* end of service.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-01 06:31:14 +0000