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-rw-r--r--src/peerinfo-tool/gnunet-peerinfo.c864
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diff --git a/src/peerinfo-tool/gnunet-peerinfo.c b/src/peerinfo-tool/gnunet-peerinfo.c
deleted file mode 100644
index 8b149c98e..000000000
--- a/src/peerinfo-tool/gnunet-peerinfo.c
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@@ -1,864 +0,0 @@
1/*
2 This file is part of GNUnet.
3 Copyright (C) 2001-2014, 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 peerinfo-tool/gnunet-peerinfo.c
23 * @brief Print information about other known peers.
24 * @author Christian Grothoff
25 * @author Matthias Wachs
26 */
27#include "platform.h"
28#include "gnunet_util_lib.h"
29#include "gnunet_hello_lib.h"
30#include "gnunet_transport_service.h"
31#include "gnunet_transport_hello_service.h"
32#include "gnunet_peerinfo_service.h"
33#include "gnunet-peerinfo_plugins.h"
34
35/**
36 * How long until we time out during address lookup?
37 */
38#define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
39
40/**
41 * Structure we use to collect printable address information.
42 */
43struct PrintContext;
44
45/**
46 * Record we keep for each printable address.
47 */
48struct AddressRecord
49{
50 /**
51 * Current address-to-string context (if active, otherwise NULL).
52 */
53 struct GNUNET_TRANSPORT_AddressToStringContext *atsc;
54
55 /**
56 * Address expiration time
57 */
58 struct GNUNET_TIME_Absolute expiration;
59
60 /**
61 * Printable address.
62 */
63 char *result;
64
65 /**
66 * Print context this address record belongs to.
67 */
68 struct PrintContext *pc;
69};
70
71
72/**
73 * Structure we use to collect printable address information.
74 */
75struct PrintContext
76{
77 /**
78 * Kept in DLL.
79 */
80 struct PrintContext *next;
81
82 /**
83 * Kept in DLL.
84 */
85 struct PrintContext *prev;
86
87 /**
88 * Identity of the peer.
89 */
90 struct GNUNET_PeerIdentity peer;
91
92 /**
93 * List of printable addresses.
94 */
95 struct AddressRecord *address_list;
96
97 /**
98 * Number of completed addresses in @e address_list.
99 */
100 unsigned int num_addresses;
101
102 /**
103 * Number of addresses allocated in @e address_list.
104 */
105 unsigned int address_list_size;
106
107 /**
108 * Current offset in @e address_list (counted down).
109 */
110 unsigned int off;
111
112 /**
113 * Hello was friend only, #GNUNET_YES or #GNUNET_NO
114 */
115 int friend_only;
116};
117
118
119/**
120 * Option '-n'
121 */
122static int no_resolve;
123
124/**
125 * Option '-q'
126 */
127static int be_quiet;
128
129/**
130 * Option '-f'
131 */
132static int include_friend_only;
133
134/**
135 * Option '-s'
136 */
137static int get_self;
138
139/**
140 * Option
141 */
142static int get_uri;
143
144/**
145 * Option
146 */
147static int default_operation;
148
149/**
150 * Option '-i'
151 */
152static int get_info;
153
154/**
155 * Option
156 */
157static char *put_uri;
158
159/**
160 * Option -d
161 */
162static char *dump_hello;
163
164/**
165 * Handle to peerinfo service.
166 */
167static struct GNUNET_PEERINFO_Handle *peerinfo;
168
169/**
170 * Configuration handle.
171 */
172static const struct GNUNET_CONFIGURATION_Handle *cfg;
173
174/**
175 * Main state machine task (if active).
176 */
177static struct GNUNET_SCHEDULER_Task *tt;
178
179/**
180 * Pending #GNUNET_TRANSPORT_hello_get() operation.
181 */
182static struct GNUNET_TRANSPORT_HelloGetHandle *gh;
183
184/**
185 * Current iterator context (if active, otherwise NULL).
186 */
187static struct GNUNET_PEERINFO_IteratorContext *pic;
188
189/**
190 * My peer identity.
191 */
192static struct GNUNET_PeerIdentity my_peer_identity;
193
194/**
195 * Head of list of print contexts.
196 */
197static struct PrintContext *pc_head;
198
199/**
200 * Tail of list of print contexts.
201 */
202static struct PrintContext *pc_tail;
203
204/**
205 * Handle to current #GNUNET_PEERINFO_add_peer() operation.
206 */
207static struct GNUNET_MQ_Envelope *ac;
208
209/**
210 * Hello of this peer (if initialized).
211 */
212static struct GNUNET_HELLO_Message *my_hello;
213
214
215/**
216 * Main state machine that goes over all options and
217 * runs the next requested function.
218 *
219 * @param cls unused
220 */
221static void
222state_machine (void *cls);
223
224
225/* ********************* 'get_info' ******************* */
226
227/**
228 * Print the collected address information to the console and free @a pc.
229 *
230 * @param pc printing context
231 */
232static void
233dump_pc (struct PrintContext *pc)
234{
235 unsigned int i;
236
237 printf (_ ("%sPeer `%s'\n"),
238 (GNUNET_YES == pc->friend_only) ? "F2F: " : "",
239 GNUNET_i2s_full (&pc->peer));
240 for (i = 0; i < pc->num_addresses; i++)
241 {
242 if (NULL != pc->address_list[i].result)
243 {
244 printf (_ ("\tExpires: %s \t %s\n"),
245 GNUNET_STRINGS_absolute_time_to_string (
246 pc->address_list[i].expiration),
247 pc->address_list[i].result);
248 GNUNET_free (pc->address_list[i].result);
249 }
250 }
251 printf ("\n");
252 GNUNET_free (pc->address_list);
253 GNUNET_CONTAINER_DLL_remove (pc_head, pc_tail, pc);
254 GNUNET_free (pc);
255 if ((NULL == pc_head) && (NULL == pic))
256 tt = GNUNET_SCHEDULER_add_now (&state_machine, NULL);
257}
258
259
260/* ************************* list all known addresses **************** */
261
262
263/**
264 * Function to call with a human-readable format of an address
265 *
266 * @param cls closure
267 * @param address NULL on error, otherwise 0-terminated printable UTF-8 string
268 * @param res result of the address to string conversion:
269 * if #GNUNET_OK: address was valid (conversion to
270 * string might still have failed)
271 * if #GNUNET_SYSERR: address is invalid
272 */
273static void
274process_resolved_address (void *cls, const char *address, int res)
275{
276 struct AddressRecord *ar = cls;
277 struct PrintContext *pc = ar->pc;
278
279 if (NULL != address)
280 {
281 if (0 != strlen (address))
282 {
283 if (NULL != ar->result)
284 GNUNET_free (ar->result);
285 ar->result = GNUNET_strdup (address);
286 }
287 return;
288 }
289 ar->atsc = NULL;
290 if (GNUNET_SYSERR == res)
291 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
292 _ ("Failure: Cannot convert address to string for peer `%s'\n"),
293 GNUNET_i2s (&ar->pc->peer));
294 pc->num_addresses++;
295 if (pc->num_addresses == pc->address_list_size)
296 dump_pc (pc);
297}
298
299
300/**
301 * Iterator callback to go over all addresses and count them.
302 *
303 * @param cls `struct PrintContext *` with `off` to increment
304 * @param address the address
305 * @param expiration expiration time
306 * @return #GNUNET_OK to keep the address and continue
307 */
308static int
309count_address (void *cls,
310 const struct GNUNET_HELLO_Address *address,
311 struct GNUNET_TIME_Absolute expiration)
312{
313 struct PrintContext *pc = cls;
314
315 pc->off++;
316 return GNUNET_OK;
317}
318
319
320/**
321 * Iterator callback to go over all addresses.
322 *
323 * @param cls closure
324 * @param address the address
325 * @param expiration expiration time
326 * @return #GNUNET_OK to keep the address and continue
327 */
328static int
329print_address (void *cls,
330 const struct GNUNET_HELLO_Address *address,
331 struct GNUNET_TIME_Absolute expiration)
332{
333 struct PrintContext *pc = cls;
334 struct AddressRecord *ar;
335
336 GNUNET_assert (0 < pc->off);
337 ar = &pc->address_list[--pc->off];
338 ar->pc = pc;
339 ar->expiration = expiration;
340 GNUNET_asprintf (&ar->result,
341 "%s:%lu:%u",
342 address->transport_name,
343 (unsigned long) address->address_length,
344 address->local_info);
345 ar->atsc = GNUNET_TRANSPORT_address_to_string (cfg,
346 address,
347 no_resolve,
348 TIMEOUT,
349 &process_resolved_address,
350 ar);
351 return GNUNET_OK;
352}
353
354
355/**
356 * Print information about the peer. Currently prints the `struct
357 * GNUNET_PeerIdentity` and the transport address.
358 *
359 * @param cls the `struct PrintContext *`
360 * @param peer identity of the peer
361 * @param hello addresses of the peer
362 * @param err_msg error message
363 */
364static void
365print_peer_info (void *cls,
366 const struct GNUNET_PeerIdentity *peer,
367 const struct GNUNET_HELLO_Message *hello,
368 const char *err_msg)
369{
370 struct PrintContext *pc;
371 int friend_only;
372
373 if (NULL == peer)
374 {
375 pic = NULL; /* end of iteration */
376 if (NULL != err_msg)
377 {
378 fprintf (stderr,
379 _ ("Error in communication with PEERINFO service: %s\n"),
380 err_msg);
381 }
382 if (NULL == pc_head)
383 tt = GNUNET_SCHEDULER_add_now (&state_machine, NULL);
384 return;
385 }
386 friend_only = GNUNET_NO;
387 if (NULL != hello)
388 friend_only = GNUNET_HELLO_is_friend_only (hello);
389 if ((GNUNET_YES == be_quiet) || (NULL == hello))
390 {
391 printf ("%s%s\n",
392 (GNUNET_YES == friend_only) ? "F2F: " : "",
393 GNUNET_i2s_full (peer));
394 return;
395 }
396 pc = GNUNET_new (struct PrintContext);
397 GNUNET_CONTAINER_DLL_insert (pc_head, pc_tail, pc);
398 pc->peer = *peer;
399 pc->friend_only = friend_only;
400 GNUNET_HELLO_iterate_addresses (hello, GNUNET_NO, &count_address, pc);
401 if (0 == pc->off)
402 {
403 dump_pc (pc);
404 return;
405 }
406 pc->address_list_size = pc->off;
407 pc->address_list = GNUNET_malloc (sizeof(struct AddressRecord) * pc->off);
408 GNUNET_HELLO_iterate_addresses (hello, GNUNET_NO, &print_address, pc);
409}
410
411
412/* ************************* DUMP Hello ************************** */
413
414/**
415 * Count the number of addresses in the HELLO.
416 *
417 * @param cls pointer to an `int *` used for the counter
418 * @param address an address to count
419 * @param expiration (unused)
420 * @return #GNUNET_OK
421 */
422static int
423count_addr (void *cls,
424 const struct GNUNET_HELLO_Address *address,
425 struct GNUNET_TIME_Absolute expiration)
426{
427 int *c = cls;
428
429 (*c)++;
430 return GNUNET_OK;
431}
432
433
434/**
435 * Write HELLO of my peer to a file.
436 *
437 * @param cls the `struct GetUriContext *`
438 * @param peer identity of the peer (unused)
439 * @param hello addresses of the peer
440 * @param err_msg error message
441 */
442static void
443dump_my_hello ()
444{
445 unsigned int size;
446 unsigned int c_addr;
447
448 size = GNUNET_HELLO_size (my_hello);
449 if (0 == size)
450 {
451 fprintf (stderr, _ ("Failure: Received invalid %s\n"), "HELLO");
452 return;
453 }
454 if (GNUNET_SYSERR ==
455 GNUNET_DISK_fn_write (dump_hello,
456 my_hello,
457 size,
458 GNUNET_DISK_PERM_USER_READ
459 | GNUNET_DISK_PERM_USER_WRITE
460 | GNUNET_DISK_PERM_GROUP_READ
461 | GNUNET_DISK_PERM_OTHER_READ))
462 {
463 fprintf (stderr,
464 _ ("Failed to write HELLO with %u bytes to file `%s'\n"),
465 size,
466 dump_hello);
467 if (0 != unlink (dump_hello))
468 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING
469 | GNUNET_ERROR_TYPE_BULK,
470 "unlink",
471 dump_hello);
472 }
473 c_addr = 0;
474 GNUNET_HELLO_iterate_addresses (my_hello, GNUNET_NO, count_addr, &c_addr);
475
476 if (! be_quiet)
477 {
478 fprintf (
479 stderr,
480 _ ("Wrote %s HELLO containing %u addresses with %u bytes to file `%s'\n"),
481 (GNUNET_YES == GNUNET_HELLO_is_friend_only (my_hello)) ? "friend-only"
482 : "public",
483 c_addr,
484 size,
485 dump_hello);
486 }
487 GNUNET_free (dump_hello);
488 dump_hello = NULL;
489}
490
491
492/* ************************* GET URI ************************** */
493
494
495/**
496 * Print URI of the peer.
497 *
498 * @param cls the `struct GetUriContext *`
499 * @param peer identity of the peer (unused)
500 * @param hello addresses of the peer
501 * @param err_msg error message
502 */
503static void
504print_my_uri (void *cls,
505 const struct GNUNET_PeerIdentity *peer,
506 const struct GNUNET_HELLO_Message *hello,
507 const char *err_msg)
508{
509 char *uri;
510
511 if (NULL == peer)
512 {
513 pic = NULL;
514 if (NULL != err_msg)
515 fprintf (stderr,
516 _ ("Error in communication with PEERINFO service: %s\n"),
517 err_msg);
518 tt = GNUNET_SCHEDULER_add_now (&state_machine, NULL);
519 return;
520 }
521
522 if (NULL == hello)
523 return;
524 uri = GNUNET_HELLO_compose_uri (hello, &GPI_plugins_find);
525 if (NULL != uri)
526 {
527 printf ("%s\n", (const char *) uri);
528 GNUNET_free (uri);
529 }
530}
531
532
533/* ************************* import HELLO by URI ********************* */
534
535
536/**
537 * Continuation called from #GNUNET_PEERINFO_add_peer()
538 *
539 * @param cls closure, NULL
540 */
541static void
542add_continuation (void *cls)
543{
544 ac = NULL;
545 tt = GNUNET_SCHEDULER_add_now (&state_machine, NULL);
546}
547
548
549/**
550 * Parse the PUT URI given at the command line and add it to our peerinfo
551 * database.
552 *
553 * @param put_uri URI string to parse
554 * @return #GNUNET_OK on success,
555 * #GNUNET_SYSERR if the URI was invalid,
556 * #GNUNET_NO on other errors
557 */
558static int
559parse_hello_uri (const char *put_uri)
560{
561 struct GNUNET_HELLO_Message *hello = NULL;
562
563 int ret = GNUNET_HELLO_parse_uri (put_uri,
564 &my_peer_identity.public_key,
565 &hello,
566 &GPI_plugins_find);
567
568 if (NULL != hello)
569 {
570 /* WARNING: this adds the address from URI WITHOUT verification! */
571 if (GNUNET_OK == ret)
572 ac = GNUNET_PEERINFO_add_peer (peerinfo, hello, &add_continuation, NULL);
573 else
574 tt = GNUNET_SCHEDULER_add_now (&state_machine, NULL);
575 GNUNET_free (hello);
576 }
577 return ret;
578}
579
580
581/* ************************ Main state machine ********************* */
582
583
584/**
585 * Main state machine that goes over all options and
586 * runs the next requested function.
587 *
588 * @param cls unused
589 */
590static void
591shutdown_task (void *cls)
592{
593 struct PrintContext *pc;
594 struct AddressRecord *ar;
595 unsigned int i;
596
597 if (NULL != ac)
598 {
599 GNUNET_MQ_send_cancel (ac);
600 ac = NULL;
601 }
602 if (NULL != tt)
603 {
604 GNUNET_SCHEDULER_cancel (tt);
605 tt = NULL;
606 }
607 if (NULL != pic)
608 {
609 GNUNET_PEERINFO_iterate_cancel (pic);
610 pic = NULL;
611 }
612 if (NULL != gh)
613 {
614 GNUNET_TRANSPORT_hello_get_cancel (gh);
615 gh = NULL;
616 }
617 while (NULL != (pc = pc_head))
618 {
619 GNUNET_CONTAINER_DLL_remove (pc_head, pc_tail, pc);
620 for (i = 0; i < pc->address_list_size; i++)
621 {
622 ar = &pc->address_list[i];
623 GNUNET_free (ar->result);
624 if (NULL != ar->atsc)
625 {
626 GNUNET_TRANSPORT_address_to_string_cancel (ar->atsc);
627 ar->atsc = NULL;
628 }
629 }
630 GNUNET_free (pc->address_list);
631 GNUNET_free (pc);
632 }
633 GPI_plugins_unload ();
634 if (NULL != peerinfo)
635 {
636 GNUNET_PEERINFO_disconnect (peerinfo);
637 peerinfo = NULL;
638 }
639 if (NULL != my_hello)
640 {
641 GNUNET_free (my_hello);
642 my_hello = NULL;
643 }
644}
645
646
647/**
648 * Function called with our peer's HELLO message.
649 * Used to obtain our peer's public key.
650 *
651 * @param cls NULL
652 * @param hello the HELLO message
653 */
654static void
655hello_callback (void *cls, const struct GNUNET_MessageHeader *hello)
656{
657 if (NULL == hello)
658 {
659 fprintf (stderr, "Failed to get my own HELLO from this peer!\n");
660 GNUNET_SCHEDULER_shutdown ();
661 return;
662 }
663 my_hello = (struct GNUNET_HELLO_Message *) GNUNET_copy_message (hello);
664 GNUNET_assert (GNUNET_OK ==
665 GNUNET_HELLO_get_id (my_hello, &my_peer_identity));
666 GNUNET_TRANSPORT_hello_get_cancel (gh);
667 gh = NULL;
668 if (NULL != dump_hello)
669 dump_my_hello ();
670 tt = GNUNET_SCHEDULER_add_now (&state_machine, NULL);
671}
672
673
674/**
675 * Main function that will be run by the scheduler.
676 *
677 * @param cls closure
678 * @param args remaining command-line arguments
679 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
680 * @param c configuration
681 */
682static void
683run (void *cls,
684 char *const *args,
685 const char *cfgfile,
686 const struct GNUNET_CONFIGURATION_Handle *c)
687{
688 cfg = c;
689 if ((NULL != args[0]) && (NULL == put_uri) &&
690 (args[0] == strcasestr (args[0], "gnunet://hello/")))
691 {
692 put_uri = GNUNET_strdup (args[0]);
693 args++;
694 }
695 if (NULL != args[0])
696 {
697 fprintf (stderr, _ ("Invalid command line argument `%s'\n"), args[0]);
698 return;
699 }
700 if (NULL == (peerinfo = GNUNET_PEERINFO_connect (cfg)))
701 {
702 fprintf (stderr, "%s", "Could not access PEERINFO service. Exiting.\n");
703 return;
704 }
705 if ((GNUNET_YES == get_self) || (GNUNET_YES == get_uri) ||
706 (NULL != dump_hello))
707 {
708 gh = GNUNET_TRANSPORT_hello_get (cfg,
709 GNUNET_TRANSPORT_AC_ANY,
710 &hello_callback,
711 NULL);
712 }
713 else
714 {
715 tt = GNUNET_SCHEDULER_add_now (&state_machine, NULL);
716 }
717 GNUNET_SCHEDULER_add_shutdown (&shutdown_task, NULL);
718}
719
720
721/**
722 * Main state machine that goes over all options and
723 * runs the next requested function.
724 *
725 * @param cls unused
726 */
727static void
728state_machine (void *cls)
729{
730 tt = NULL;
731
732 if (NULL != put_uri)
733 {
734 GPI_plugins_load (cfg);
735 if (GNUNET_SYSERR == parse_hello_uri (put_uri))
736 {
737 fprintf (stderr, _ ("Invalid URI `%s'\n"), put_uri);
738 GNUNET_SCHEDULER_shutdown ();
739 }
740 GNUNET_free (put_uri);
741 put_uri = NULL;
742 }
743 else if (GNUNET_YES == get_info)
744 {
745 get_info = GNUNET_NO;
746 GPI_plugins_load (cfg);
747 pic = GNUNET_PEERINFO_iterate (peerinfo,
748 include_friend_only,
749 NULL,
750 &print_peer_info,
751 NULL);
752 }
753 else if (GNUNET_YES == get_self)
754 {
755 get_self = GNUNET_NO;
756 if (be_quiet)
757 printf ("%s\n", GNUNET_i2s_full (&my_peer_identity));
758 else
759 printf (_ ("I am peer `%s'.\n"), GNUNET_i2s_full (&my_peer_identity));
760 tt = GNUNET_SCHEDULER_add_now (&state_machine, NULL);
761 }
762 else if (GNUNET_YES == get_uri)
763 {
764 GPI_plugins_load (cfg);
765 pic = GNUNET_PEERINFO_iterate (peerinfo,
766 include_friend_only,
767 &my_peer_identity,
768 &print_my_uri,
769 NULL);
770 get_uri = GNUNET_NO;
771 }
772 else if (GNUNET_YES == default_operation)
773 {
774 /* default operation list all */
775 default_operation = GNUNET_NO;
776 get_info = GNUNET_YES;
777 tt = GNUNET_SCHEDULER_add_now (&state_machine, NULL);
778 }
779 else
780 {
781 GNUNET_SCHEDULER_shutdown ();
782 }
783 default_operation = GNUNET_NO;
784}
785
786
787/**
788 * The main function to obtain peer information.
789 *
790 * @param argc number of arguments from the command line
791 * @param argv command line arguments
792 * @return 0 ok, 1 on error
793 */
794int
795main (int argc, char *const *argv)
796{
797 struct GNUNET_GETOPT_CommandLineOption options[] =
798 { GNUNET_GETOPT_option_flag ('n',
799 "numeric",
800 gettext_noop ("don't resolve host names"),
801 &no_resolve),
802
803 GNUNET_GETOPT_option_flag ('q',
804 "quiet",
805 gettext_noop (
806 "output only the identity strings"),
807 &be_quiet),
808 GNUNET_GETOPT_option_flag ('f',
809 "friends",
810 gettext_noop (
811 "include friend-only information"),
812 &include_friend_only),
813
814 GNUNET_GETOPT_option_flag ('s',
815 "self",
816 gettext_noop ("output our own identity only"),
817 &get_self),
818
819 GNUNET_GETOPT_option_flag ('i',
820 "info",
821 gettext_noop ("list all known peers"),
822 &get_info),
823
824 GNUNET_GETOPT_option_string ('d',
825 "dump-hello",
826 NULL,
827 gettext_noop ("dump hello to file"),
828 &dump_hello),
829
830 GNUNET_GETOPT_option_flag ('g',
831 "get-hello",
832 gettext_noop ("also output HELLO uri(s)"),
833 &get_uri),
834
835 GNUNET_GETOPT_option_string ('p',
836 "put-hello",
837 "HELLO",
838 gettext_noop (
839 "add given HELLO uri to the database"),
840 &put_uri),
841
842 GNUNET_GETOPT_OPTION_END };
843 int ret;
844
845 default_operation = GNUNET_YES;
846 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
847 return 2;
848
849 ret = (GNUNET_OK ==
850 GNUNET_PROGRAM_run (argc,
851 argv,
852 "gnunet-peerinfo",
853 gettext_noop ("Print information about peers."),
854 options,
855 &run,
856 NULL))
857 ? 0
858 : 1;
859 GNUNET_free_nz ((void *) argv);
860 return ret;
861}
862
863
864/* end of gnunet-peerinfo.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-05 19:37:07 +0000