GNUnet  0.11.x
gnunet-service-identity.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2013 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 
33 #include "platform.h"
34 #include "gnunet_util_lib.h"
35 #include "gnunet_constants.h"
36 #include "gnunet_protocols.h"
39 #include "identity.h"
40 
41 
45 struct Ego
46 {
50  struct Ego *next;
51 
55  struct Ego *prev;
56 
61 
65  char *identifier;
66 };
67 
68 
72 static const struct GNUNET_CONFIGURATION_Handle *cfg;
73 
79 
84 
89 
93 static char *ego_directory;
94 
98 static char *subsystem_cfg_file;
99 
103 static struct Ego *ego_head;
104 
108 static struct Ego *ego_tail;
109 
110 
117 static char *
118 get_ego_filename (struct Ego *ego)
119 {
120  char *filename;
121 
122  GNUNET_asprintf (&filename,
123  "%s%s%s",
126  ego->identifier);
127  return filename;
128 }
129 
130 
138 static void
140  struct GNUNET_SERVICE_Client *client,
141  void *app_ctx)
142 {
144  "Client %p disconnected\n",
145  client);
146 }
147 
148 
157 static void *
158 client_connect_cb (void *cls,
159  struct GNUNET_SERVICE_Client *client,
160  struct GNUNET_MQ_Handle *mq)
161 {
162  return client;
163 }
164 
165 
171 static void
172 shutdown_task (void *cls)
173 {
174  struct Ego *e;
175 
176  if (NULL != nc)
177  {
179  nc = NULL;
180  }
181  if (NULL != stats)
182  {
184  stats = NULL;
185  }
186  GNUNET_CONFIGURATION_destroy (subsystem_cfg);
187  subsystem_cfg = NULL;
189  subsystem_cfg_file = NULL;
191  ego_directory = NULL;
192  while (NULL != (e = ego_head))
193  {
194  GNUNET_CONTAINER_DLL_remove (ego_head,
195  ego_tail,
196  e);
197  GNUNET_free (e->identifier);
198  GNUNET_free (e);
199  }
200 }
201 
202 
210 static void
212  uint32_t result_code,
213  const char *emsg)
214 {
215  struct ResultCodeMessage *rcm;
216  struct GNUNET_MQ_Envelope *env;
217  size_t elen;
218 
219  if (NULL == emsg)
220  elen = 0;
221  else
222  elen = strlen (emsg) + 1;
223  env =
225  rcm->result_code = htonl (result_code);
226  if (0 < elen)
227  GNUNET_memcpy (&rcm[1], emsg, elen);
229  "Sending result %d (%s) to client\n",
230  (int) result_code,
231  emsg);
233 }
234 
235 
242 static struct GNUNET_MQ_Envelope *
244 {
245  struct UpdateMessage *um;
246  struct GNUNET_MQ_Envelope *env;
247  size_t name_len;
248 
249  name_len = (NULL == ego->identifier) ? 0 : (strlen (ego->identifier) + 1);
251  um->name_len = htons (name_len);
252  um->end_of_list = htons (GNUNET_NO);
253  um->private_key = ego->pk;
254  GNUNET_memcpy (&um[1], ego->identifier, name_len);
255  return env;
256 }
257 
258 
266 static struct GNUNET_MQ_Envelope *
268  const char *servicename)
269 {
270  struct SetDefaultMessage *sdm;
271  struct GNUNET_MQ_Envelope *env;
272  size_t name_len;
273 
274  name_len = (NULL == servicename) ? 0 : (strlen (servicename) + 1);
275  env = GNUNET_MQ_msg_extra (sdm,
276  name_len,
278  sdm->name_len = htons (name_len);
279  sdm->reserved = htons (0);
280  sdm->private_key = ego->pk;
281  GNUNET_memcpy (&sdm[1], servicename, name_len);
282  return env;
283 }
284 
285 
295 static void
297  const struct GNUNET_MessageHeader *message)
298 {
299  struct GNUNET_SERVICE_Client *client = cls;
300 
302  "Received START message from client\n");
307  for (struct Ego *ego = ego_head; NULL != ego; ego = ego->next)
308  {
310  create_update_message (ego));
311  }
312  {
313  struct UpdateMessage *ume;
314  struct GNUNET_MQ_Envelope *env;
315 
316  env = GNUNET_MQ_msg_extra (ume,
317  0,
319  ume->end_of_list = htons (GNUNET_YES);
320  ume->name_len = htons (0);
322  env);
323  }
325 }
326 
327 
336 static int
338  const struct LookupMessage *message)
339 {
341  return GNUNET_OK;
342 }
343 
344 
352 static void
354  const struct LookupMessage *message)
355 {
356  struct GNUNET_SERVICE_Client *client = cls;
357  const char *name;
358  struct GNUNET_MQ_Envelope *env;
359  struct Ego *ego;
360 
362  "Received LOOKUP message from client\n");
363  name = (const char *) &message[1];
364  for (ego = ego_head; NULL != ego; ego = ego->next)
365  {
366  if (0 != strcasecmp (name, ego->identifier))
367  continue;
368  env = create_update_message (ego);
371  return;
372  }
373  send_result_code (client, 0, "ego not found");
375 }
376 
377 
386 static int
388  const struct LookupMessage *message)
389 {
391  return GNUNET_OK;
392 }
393 
394 
402 static void
404  const struct LookupMessage *message)
405 {
406  struct GNUNET_SERVICE_Client *client = cls;
407  const char *name;
408  struct GNUNET_MQ_Envelope *env;
409  struct Ego *lprefix;
410 
412  "Received LOOKUP_BY_SUFFIX message from client\n");
413  name = (const char *) &message[1];
414  lprefix = NULL;
415  for (struct Ego *ego = ego_head; NULL != ego; ego = ego->next)
416  {
417  if ((strlen (ego->identifier) <= strlen (name)) &&
418  (0 == strcmp (ego->identifier,
419  &name[strlen (name) - strlen (ego->identifier)])) &&
420  ((strlen (name) == strlen (ego->identifier)) ||
421  ('.' == name[strlen (name) - strlen (ego->identifier) - 1])) &&
422  ((NULL == lprefix) ||
423  (strlen (ego->identifier) > strlen (lprefix->identifier))))
424  {
425  /* found better match, update! */
426  lprefix = ego;
427  }
428  }
429  if (NULL != lprefix)
430  {
431  env = create_update_message (lprefix);
434  return;
435  }
436  send_result_code (client, 0, "ego not found");
438 }
439 
440 
448 static int
450  const struct GetDefaultMessage *msg)
451 {
452  uint16_t size;
453  uint16_t name_len;
454  const char *name;
455 
456  size = ntohs (msg->header.size);
457  if (size <= sizeof(struct GetDefaultMessage))
458  {
459  GNUNET_break (0);
460  return GNUNET_SYSERR;
461  }
462  name = (const char *) &msg[1];
463  name_len = ntohs (msg->name_len);
464  if ((name_len + sizeof(struct GetDefaultMessage) != size) ||
465  (0 != ntohs (msg->reserved)) || ('\0' != name[name_len - 1]))
466  {
467  GNUNET_break (0);
468  return GNUNET_SYSERR;
469  }
470  return GNUNET_OK;
471 }
472 
473 
482 static void
484  const struct GetDefaultMessage *gdm)
485 {
486  struct GNUNET_MQ_Envelope *env;
487  struct GNUNET_SERVICE_Client *client = cls;
488  char *name;
489  char *identifier;
490 
491  name = GNUNET_strdup ((const char *) &gdm[1]);
492  GNUNET_STRINGS_utf8_tolower ((const char *) &gdm[1],
493  name);
495  "Received GET_DEFAULT for service `%s' from client\n",
496  name);
497  if (GNUNET_OK !=
499  name,
500  "DEFAULT_IDENTIFIER",
501  &identifier))
502  {
503  send_result_code (client, 1, gettext_noop ("no default known"));
505  GNUNET_free (name);
506  return;
507  }
508  for (struct Ego *ego = ego_head; NULL != ego; ego = ego->next)
509  {
510  if (0 == strcmp (ego->identifier, identifier))
511  {
512  env = create_set_default_message (ego, name);
515  GNUNET_free (identifier);
516  GNUNET_free (name);
517  return;
518  }
519  }
520  GNUNET_free (identifier);
522  "Failed to find ego `%s'\n",
523  name);
524  GNUNET_free (name);
525  send_result_code (client,
526  1,
527  gettext_noop (
528  "default configured, but ego unknown (internal error)"));
530 }
531 
532 
540 static int
542  const struct GNUNET_CRYPTO_EcdsaPrivateKey *pk2)
543 {
544  return GNUNET_memcmp (pk1, pk2);
545 }
546 
547 
555 static int
557  const struct SetDefaultMessage *msg)
558 {
559  uint16_t size;
560  uint16_t name_len;
561  const char *str;
562 
563  size = ntohs (msg->header.size);
564  if (size <= sizeof(struct SetDefaultMessage))
565  {
566  GNUNET_break (0);
567  return GNUNET_SYSERR;
568  }
569  name_len = ntohs (msg->name_len);
570  GNUNET_break (0 == ntohs (msg->reserved));
571  if (name_len + sizeof(struct SetDefaultMessage) != size)
572  {
573  GNUNET_break (0);
574  return GNUNET_SYSERR;
575  }
576  str = (const char *) &msg[1];
577  if ('\0' != str[name_len - 1])
578  {
579  GNUNET_break (0);
580  return GNUNET_SYSERR;
581  }
582  return GNUNET_OK;
583 }
584 
585 
594 static void
596  const struct SetDefaultMessage *sdm)
597 {
598  struct Ego *ego;
599  struct GNUNET_SERVICE_Client *client = cls;
600  char *str;
601 
602  str = GNUNET_strdup ((const char *) &sdm[1]);
603  GNUNET_STRINGS_utf8_tolower ((const char *) &sdm[1], str);
604 
606  "Received SET_DEFAULT for service `%s' from client\n",
607  str);
608  for (ego = ego_head; NULL != ego; ego = ego->next)
609  {
610  if (0 == key_cmp (&ego->pk,
611  &sdm->private_key))
612  {
614  str,
615  "DEFAULT_IDENTIFIER",
616  ego->identifier);
617  if (GNUNET_OK !=
619  GNUNET_log (
621  _ ("Failed to write subsystem default identifier map to `%s'.\n"),
623  send_result_code (client, 0, NULL);
625  GNUNET_free (str);
626  return;
627  }
628  }
629  send_result_code (client,
630  1,
631  _ ("Unknown ego specified for service (internal error)"));
632  GNUNET_free (str);
634 }
635 
636 
642 static void
643 notify_listeners (struct Ego *ego)
644 {
645  struct UpdateMessage *um;
646  size_t name_len;
647 
648  name_len = (NULL == ego->identifier) ? 0 : (strlen (ego->identifier) + 1);
649  um = GNUNET_malloc (sizeof(struct UpdateMessage) + name_len);
651  um->header.size = htons (sizeof(struct UpdateMessage) + name_len);
652  um->name_len = htons (name_len);
653  um->end_of_list = htons (GNUNET_NO);
654  um->private_key = ego->pk;
655  GNUNET_memcpy (&um[1], ego->identifier, name_len);
657  GNUNET_free (um);
658 }
659 
660 
668 static int
670  const struct CreateRequestMessage *msg)
671 {
672  uint16_t size;
673  uint16_t name_len;
674  const char *str;
675 
676  size = ntohs (msg->header.size);
677  if (size <= sizeof(struct CreateRequestMessage))
678  {
679  GNUNET_break (0);
680  return GNUNET_SYSERR;
681  }
682  name_len = ntohs (msg->name_len);
683  GNUNET_break (0 == ntohs (msg->reserved));
684  if (name_len + sizeof(struct CreateRequestMessage) != size)
685  {
686  GNUNET_break (0);
687  return GNUNET_SYSERR;
688  }
689  str = (const char *) &msg[1];
690  if ('\0' != str[name_len - 1])
691  {
692  GNUNET_break (0);
693  return GNUNET_SYSERR;
694  }
695  return GNUNET_OK;
696 }
697 
698 
707 static void
709  const struct CreateRequestMessage *crm)
710 {
711  struct GNUNET_SERVICE_Client *client = cls;
712  struct Ego *ego;
713  char *str;
714  char *fn;
715 
716  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received CREATE message from client\n");
717  str = GNUNET_strdup ((const char *) &crm[1]);
718  GNUNET_STRINGS_utf8_tolower ((const char *) &crm[1], str);
719  for (ego = ego_head; NULL != ego; ego = ego->next)
720  {
721  if (0 == strcmp (ego->identifier, str))
722  {
723  send_result_code (client,
724  1,
725  gettext_noop (
726  "identifier already in use for another ego"));
728  GNUNET_free (str);
729  return;
730  }
731  }
732  ego = GNUNET_new (struct Ego);
733  ego->pk = crm->private_key;
734  ego->identifier = GNUNET_strdup (str);
735  GNUNET_CONTAINER_DLL_insert (ego_head,
736  ego_tail,
737  ego);
738  send_result_code (client, 0, NULL);
739  fn = get_ego_filename (ego);
741  if (sizeof(struct GNUNET_CRYPTO_EcdsaPrivateKey) !=
743  &crm->private_key,
744  sizeof(struct GNUNET_CRYPTO_EcdsaPrivateKey),
748  GNUNET_free (fn);
749  GNUNET_free (str);
750  notify_listeners (ego);
752 }
753 
754 
759 {
763  const char *old_name;
764 
768  const char *new_name;
769 };
770 
778 static void
779 handle_ego_rename (void *cls, const char *section)
780 {
781  struct RenameContext *rc = cls;
782  char *id;
783 
784  if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (subsystem_cfg,
785  section,
786  "DEFAULT_IDENTIFIER",
787  &id))
788  return;
789  if (0 != strcmp (id, rc->old_name))
790  {
791  GNUNET_free (id);
792  return;
793  }
795  section,
796  "DEFAULT_IDENTIFIER",
797  rc->new_name);
798  GNUNET_free (id);
799 }
800 
801 
809 static int
810 check_rename_message (void *cls, const struct RenameMessage *msg)
811 {
812  uint16_t size;
813  uint16_t old_name_len;
814  uint16_t new_name_len;
815  const char *old_name;
816  const char *new_name;
817 
818  size = ntohs (msg->header.size);
819  if (size <= sizeof(struct RenameMessage))
820  {
821  GNUNET_break (0);
822  return GNUNET_SYSERR;
823  }
824  old_name_len = ntohs (msg->old_name_len);
825  new_name_len = ntohs (msg->new_name_len);
826  old_name = (const char *) &msg[1];
827  new_name = &old_name[old_name_len];
828  if ((old_name_len + new_name_len + sizeof(struct RenameMessage) != size) ||
829  ('\0' != old_name[old_name_len - 1]) ||
830  ('\0' != new_name[new_name_len - 1]))
831  {
832  GNUNET_break (0);
833  return GNUNET_SYSERR;
834  }
835 
836  return GNUNET_OK;
837 }
838 
839 
848 static void
849 handle_rename_message (void *cls, const struct RenameMessage *rm)
850 {
851  uint16_t old_name_len;
852  struct Ego *ego;
853  char *old_name;
854  char *new_name;
855  struct RenameContext rename_ctx;
856  struct GNUNET_SERVICE_Client *client = cls;
857  char *fn_old;
858  char *fn_new;
859  const char *old_name_tmp;
860 
861  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received RENAME message from client\n");
862  old_name_len = ntohs (rm->old_name_len);
863  old_name_tmp = (const char *) &rm[1];
864  old_name = GNUNET_strdup (old_name_tmp);
865  GNUNET_STRINGS_utf8_tolower (old_name_tmp, old_name);
866  new_name = GNUNET_strdup (&old_name_tmp[old_name_len]);
867  GNUNET_STRINGS_utf8_tolower (&old_name_tmp[old_name_len], new_name);
868 
869  /* check if new name is already in use */
870  for (ego = ego_head; NULL != ego; ego = ego->next)
871  {
872  if (0 == strcmp (ego->identifier, new_name))
873  {
874  send_result_code (client, 1, gettext_noop ("target name already exists"));
876  GNUNET_free (old_name);
877  GNUNET_free (new_name);
878  return;
879  }
880  }
881 
882  /* locate old name and, if found, perform rename */
883  for (ego = ego_head; NULL != ego; ego = ego->next)
884  {
885  if (0 == strcmp (ego->identifier, old_name))
886  {
887  fn_old = get_ego_filename (ego);
888  GNUNET_free (ego->identifier);
889  rename_ctx.old_name = old_name;
890  rename_ctx.new_name = new_name;
893  &rename_ctx);
894  if (GNUNET_OK !=
896  GNUNET_log (
898  _ ("Failed to write subsystem default identifier map to `%s'.\n"),
900  ego->identifier = GNUNET_strdup (new_name);
901  fn_new = get_ego_filename (ego);
902  if (0 != rename (fn_old, fn_new))
904  GNUNET_free (fn_old);
905  GNUNET_free (fn_new);
906  GNUNET_free (old_name);
907  GNUNET_free (new_name);
908  notify_listeners (ego);
909  send_result_code (client, 0, NULL);
911  return;
912  }
913  }
914 
915  /* failed to locate old name */
916  send_result_code (client, 1, gettext_noop ("no matching ego found"));
917  GNUNET_free (old_name);
918  GNUNET_free (new_name);
920 }
921 
922 
930 static void
931 handle_ego_delete (void *cls, const char *section)
932 {
933  const char *identifier = cls;
934  char *id;
935 
936  if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (subsystem_cfg,
937  section,
938  "DEFAULT_IDENTIFIER",
939  &id))
940  return;
941  if (0 != strcmp (id, identifier))
942  {
943  GNUNET_free (id);
944  return;
945  }
947  section,
948  "DEFAULT_IDENTIFIER",
949  NULL);
950  GNUNET_free (id);
951 }
952 
953 
961 static int
962 check_delete_message (void *cls, const struct DeleteMessage *msg)
963 {
964  uint16_t size;
965  uint16_t name_len;
966  const char *name;
967 
968  size = ntohs (msg->header.size);
969  if (size <= sizeof(struct DeleteMessage))
970  {
971  GNUNET_break (0);
972  return GNUNET_SYSERR;
973  }
974  name = (const char *) &msg[1];
975  name_len = ntohs (msg->name_len);
976  if ((name_len + sizeof(struct DeleteMessage) != size) ||
977  (0 != ntohs (msg->reserved)) || ('\0' != name[name_len - 1]))
978  {
979  GNUNET_break (0);
980  return GNUNET_SYSERR;
981  }
982  return GNUNET_OK;
983 }
984 
985 
994 static void
995 handle_delete_message (void *cls, const struct DeleteMessage *dm)
996 {
997  struct Ego *ego;
998  char *name;
999  char *fn;
1000  struct GNUNET_SERVICE_Client *client = cls;
1001 
1002  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received DELETE message from client\n");
1003  name = GNUNET_strdup ((const char *) &dm[1]);
1004  GNUNET_STRINGS_utf8_tolower ((const char *) &dm[1], name);
1005 
1006  for (ego = ego_head; NULL != ego; ego = ego->next)
1007  {
1008  if (0 == strcmp (ego->identifier, name))
1009  {
1010  GNUNET_CONTAINER_DLL_remove (ego_head, ego_tail, ego);
1013  ego->identifier);
1014  if (GNUNET_OK !=
1016  GNUNET_log (
1018  _ ("Failed to write subsystem default identifier map to `%s'.\n"),
1020  fn = get_ego_filename (ego);
1021  if (0 != unlink (fn))
1023  GNUNET_free (fn);
1024  GNUNET_free (ego->identifier);
1025  ego->identifier = NULL;
1026  notify_listeners (ego);
1027  GNUNET_free (ego);
1028  GNUNET_free (name);
1029  send_result_code (client, 0, NULL);
1031  return;
1032  }
1033  }
1034 
1035  send_result_code (client, 1, gettext_noop ("no matching ego found"));
1036  GNUNET_free (name);
1038 }
1039 
1040 
1051 static int
1052 process_ego_file (void *cls,
1053  const char *filename)
1054 {
1055  struct Ego *ego;
1056  const char *fn;
1057 
1058  fn = strrchr (filename, (int) DIR_SEPARATOR);
1059  if (NULL == fn)
1060  {
1061  GNUNET_break (0);
1062  return GNUNET_OK;
1063  }
1064  ego = GNUNET_new (struct Ego);
1065  if (GNUNET_OK !=
1067  GNUNET_NO,
1068  &ego->pk))
1069  {
1070  GNUNET_free (ego);
1072  _ ("Failed to parse ego information in `%s'\n"),
1073  filename);
1074  return GNUNET_OK;
1075  }
1077  "Loaded ego `%s'\n",
1078  fn + 1);
1079  ego->identifier = GNUNET_strdup (fn + 1);
1080  GNUNET_CONTAINER_DLL_insert (ego_head, ego_tail, ego);
1081  return GNUNET_OK;
1082 }
1083 
1084 
1092 static void
1093 run (void *cls,
1094  const struct GNUNET_CONFIGURATION_Handle *c,
1096 {
1097  cfg = c;
1100  "identity",
1101  "EGODIR",
1102  &ego_directory))
1103  {
1104  GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, "identity", "EGODIR");
1106  return;
1107  }
1108  if (GNUNET_OK !=
1110  "identity",
1111  "SUBSYSTEM_CFG",
1113  {
1115  "identity",
1116  "SUBSYSTEM_CFG");
1118  return;
1119  }
1121  "Loading subsystem configuration `%s'\n",
1123  subsystem_cfg = GNUNET_CONFIGURATION_create ();
1125  (GNUNET_OK !=
1127  {
1129  _ (
1130  "Failed to parse subsystem identity configuration file `%s'\n"),
1133  return;
1134  }
1135  stats = GNUNET_STATISTICS_create ("identity", cfg);
1137  {
1139  _ ("Failed to create directory `%s' for storing egos\n"),
1140  ego_directory);
1141  }
1144  NULL);
1146 }
1147 
1148 
1153  "identity",
1155  &run,
1158  NULL,
1159  GNUNET_MQ_hd_fixed_size (start_message,
1161  struct GNUNET_MessageHeader,
1162  NULL),
1163  GNUNET_MQ_hd_var_size (lookup_message,
1165  struct LookupMessage,
1166  NULL),
1167  GNUNET_MQ_hd_var_size (lookup_by_suffix_message,
1169  struct LookupMessage,
1170  NULL),
1171  GNUNET_MQ_hd_var_size (get_default_message,
1173  struct GetDefaultMessage,
1174  NULL),
1175  GNUNET_MQ_hd_var_size (set_default_message,
1177  struct SetDefaultMessage,
1178  NULL),
1179  GNUNET_MQ_hd_var_size (create_message,
1181  struct CreateRequestMessage,
1182  NULL),
1183  GNUNET_MQ_hd_var_size (rename_message,
1185  struct RenameMessage,
1186  NULL),
1187  GNUNET_MQ_hd_var_size (delete_message,
1189  struct DeleteMessage,
1190  NULL),
1192 
1193 
1194 /* end of gnunet-service-identity.c */
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
GNUNET_SERVICE_MAIN("identity", GNUNET_SERVICE_OPTION_NONE, &run, &client_connect_cb, &client_disconnect_cb, NULL, GNUNET_MQ_hd_fixed_size(start_message, GNUNET_MESSAGE_TYPE_IDENTITY_START, struct GNUNET_MessageHeader, NULL), GNUNET_MQ_hd_var_size(lookup_message, GNUNET_MESSAGE_TYPE_IDENTITY_LOOKUP, struct LookupMessage, NULL), GNUNET_MQ_hd_var_size(lookup_by_suffix_message, GNUNET_MESSAGE_TYPE_IDENTITY_LOOKUP_BY_SUFFIX, struct LookupMessage, NULL), GNUNET_MQ_hd_var_size(get_default_message, GNUNET_MESSAGE_TYPE_IDENTITY_GET_DEFAULT, struct GetDefaultMessage, NULL), GNUNET_MQ_hd_var_size(set_default_message, GNUNET_MESSAGE_TYPE_IDENTITY_SET_DEFAULT, struct SetDefaultMessage, NULL), GNUNET_MQ_hd_var_size(create_message, GNUNET_MESSAGE_TYPE_IDENTITY_CREATE, struct CreateRequestMessage, NULL), GNUNET_MQ_hd_var_size(rename_message, GNUNET_MESSAGE_TYPE_IDENTITY_RENAME, struct RenameMessage, NULL), GNUNET_MQ_hd_var_size(delete_message, GNUNET_MESSAGE_TYPE_IDENTITY_DELETE, struct DeleteMessage, NULL), GNUNET_MQ_handler_end())
Define "main" method using service macro.
uint16_t reserved
Always zero.
Definition: identity.h:179
int GNUNET_DISK_file_test(const char *fil)
Check that fil corresponds to a filename (of a file that exists and that is not a directory)...
Definition: disk.c:544
struct GNUNET_CRYPTO_EcdsaPrivateKey private_key
The private key.
Definition: identity.h:154
Message from client to GNS service to lookup records.
Definition: gns.h:36
#define GNUNET_MESSAGE_TYPE_IDENTITY_START
First message send from identity client to service (to subscribe to updates).
struct Ego * prev
We keep egos in a DLL.
#define GNUNET_MESSAGE_TYPE_IDENTITY_SET_DEFAULT
Client sets default identity; or service informs about default identity.
static struct GNUNET_SERVICE_Handle * service
Handle to our service instance.
static int check_delete_message(void *cls, const struct DeleteMessage *msg)
Checks a GNUNET_MESSAGE_TYPE_IDENTITY_DELETE message.
The notification context is the key datastructure for a convenience API used for transmission of noti...
Definition: nc.c:75
Used from service to client as a result to the GET_DEFAULT message, used from client to service to SE...
Definition: identity.h:134
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
#define GNUNET_MESSAGE_TYPE_IDENTITY_DELETE
Delete identity (client->service).
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_IDENTITY_CREATE.
Definition: identity.h:169
struct Ego * next
We keep egos in a DLL.
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
int GNUNET_CONFIGURATION_write(struct GNUNET_CONFIGURATION_Handle *cfg, const char *filename)
Write configuration file.
Common type definitions for the identity service and API.
static void * client_connect_cb(void *cls, struct GNUNET_SERVICE_Client *client, struct GNUNET_MQ_Handle *mq)
Add a client to our list of active clients.
Handle to a service.
Definition: service.c:116
uint16_t reserved
Always zero.
Definition: identity.h:123
static char * get_ego_filename(struct Ego *ego)
Get the name of the file we use to store a given ego.
static void send_result_code(struct GNUNET_SERVICE_Client *client, uint32_t result_code, const char *emsg)
Send a result code back to the client.
static void handle_lookup_message(void *cls, const struct LookupMessage *message)
Handler for LOOKUP message from client, sends information about ONE identity to the client immediatel...
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2436
int GNUNET_DISK_directory_create(const char *dir)
Implementation of "mkdir -p".
Definition: disk.c:589
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_shutdown(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run on shutdown, that is when a CTRL-C signal is received, or when GNUNET_SCHEDULER_shutdown() is being invoked.
Definition: scheduler.c:1331
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_IDENTITY_UPDATE.
Definition: identity.h:82
struct GNUNET_STATISTICS_Handle * GNUNET_STATISTICS_create(const char *subsystem, const struct GNUNET_CONFIGURATION_Handle *cfg)
Get handle for the statistics service.
static int check_create_message(void *cls, const struct CreateRequestMessage *msg)
Checks a GNUNET_MESSAGE_TYPE_IDENTITY_CREATE message.
uint16_t name_len
Number of bytes in service name string including 0-termination, in NBO.
Definition: identity.h:144
int GNUNET_CRYPTO_ecdsa_key_from_file(const char *filename, int do_create, struct GNUNET_CRYPTO_EcdsaPrivateKey *pkey)
Create a new private key by reading it from a file.
static void handle_set_default_message(void *cls, const struct SetDefaultMessage *sdm)
Handler for SET_DEFAULT message from client, updates default identity for some service.
uint16_t name_len
Number of bytes in service name string including 0-termination, in NBO.
Definition: identity.h:118
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_IDENTITY_GET_DEFAULT.
Definition: identity.h:113
uint16_t old_name_len
Number of characters in the old name including 0-termination, in NBO.
Definition: identity.h:204
Client requests renaming of an identity.
Definition: identity.h:194
struct GNUNET_CRYPTO_EcdsaPrivateKey private_key
The private key.
Definition: identity.h:98
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_MQ_hd_fixed_size(name, code, str, ctx)
uint16_t reserved
Always zero.
Definition: identity.h:235
static struct Experiment * e
int GNUNET_DISK_directory_create_for_file(const char *filename)
Create the directory structure for storing a file.
Definition: disk.c:684
static void handle_lookup_by_suffix_message(void *cls, const struct LookupMessage *message)
Handler for LOOKUP_BY_SUFFIX message from client, sends information about ONE identity to the client ...
#define GNUNET_MESSAGE_TYPE_IDENTITY_UPDATE
Update about identity status from service to clients.
static struct GNUNET_IDENTITY_Handle * id
Handle to identity service.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
Private ECC key encoded for transmission.
struct GNUNET_CONFIGURATION_Handle * GNUNET_CONFIGURATION_create(void)
Create a new configuration object.
int GNUNET_CONFIGURATION_parse(struct GNUNET_CONFIGURATION_Handle *cfg, const char *filename)
Parse a configuration file, add all of the options in the file to the configuration environment...
int GNUNET_DISK_directory_scan(const char *dir_name, GNUNET_FileNameCallback callback, void *callback_cls)
Scan a directory for files.
Definition: disk.c:911
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
void GNUNET_STATISTICS_destroy(struct GNUNET_STATISTICS_Handle *h, int sync_first)
Destroy a handle (free all state associated with it).
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:531
Handle for the service.
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
uint16_t name_len
Number of bytes in identity name string including 0-termination, in NBO.
Definition: identity.h:174
void GNUNET_notification_context_add(struct GNUNET_NotificationContext *nc, struct GNUNET_MQ_Handle *mq)
Add a subscriber to the notification context.
Definition: nc.c:160
static int check_lookup_message(void *cls, const struct LookupMessage *message)
Handler for LOOKUP message from client, sends information about ONE identity to the client immediatel...
ssize_t GNUNET_DISK_fn_write(const char *fn, const void *buffer, size_t n, enum GNUNET_DISK_AccessPermissions mode)
Write a buffer to a file.
Definition: disk.c:879
Closure for &#39;handle_ego_rename&#39;.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define _(String)
GNU gettext support macro.
Definition: platform.h:184
static char * section
Name of the section.
Definition: gnunet-config.c:33
static const struct GNUNET_CONFIGURATION_Handle * cfg
Handle to our current configuration.
Handle to a client that is connected to a service.
Definition: service.c:250
uint16_t reserved
Always zero.
Definition: identity.h:149
int GNUNET_asprintf(char **buf, const char *format,...)
Like asprintf, just portable.
static void handle_create_message(void *cls, const struct CreateRequestMessage *crm)
Handler for CREATE message from client, creates new identity.
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct...
Definition: gnunet_mq_lib.h:52
uint16_t type
The type of the message (GNUNET_MESSAGE_TYPE_XXXX), in big-endian format.
static int check_set_default_message(void *cls, const struct SetDefaultMessage *msg)
Checks a GNUNET_MESSAGE_TYPE_IDENTITY_SET_DEFAULT message.
#define GNUNET_MQ_check_zero_termination(m)
Insert code for a "check_" function that verifies that a given variable-length message received over ...
static void handle_ego_delete(void *cls, const char *section)
An ego was removed, remove it from all subsystems where it is currently set as the default...
void GNUNET_log_config_missing(enum GNUNET_ErrorType kind, const char *section, const char *option)
Log error message about missing configuration option.
static struct GNUNET_STATISTICS_Handle * stats
Handle to the statistics service.
static void client_disconnect_cb(void *cls, struct GNUNET_SERVICE_Client *client, void *app_ctx)
Called whenever a client is disconnected.
#define GNUNET_log_strerror_file(level, cmd, filename)
Log an error message at log-level &#39;level&#39; that indicates a failure of the command &#39;cmd&#39; with the mess...
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
static char * fn
Filename of the unique file.
static struct GNUNET_MQ_Envelope * create_set_default_message(struct Ego *ego, const char *servicename)
Create a set default message with information about the current state of an ego.
#define GNUNET_MESSAGE_TYPE_IDENTITY_LOOKUP
First message send from identity client to service to lookup a single ego.
Client requests creation of an identity.
Definition: identity.h:164
#define DIR_SEPARATOR_STR
Definition: platform.h:171
void GNUNET_CONFIGURATION_destroy(struct GNUNET_CONFIGURATION_Handle *cfg)
Destroy configuration object.
static char * filename
static int check_rename_message(void *cls, const struct RenameMessage *msg)
Checks a GNUNET_MESSAGE_TYPE_IDENTITY_RENAME message.
char * identifier
String identifier for the ego.
void GNUNET_CONFIGURATION_set_value_string(struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, const char *value)
Set a configuration value that should be a string.
void GNUNET_SERVICE_client_mark_monitor(struct GNUNET_SERVICE_Client *c)
Set the &#39;monitor&#39; flag on this client.
Definition: service.c:2406
static void shutdown_task(void *cls)
Task run during shutdown.
static void run(void *cls, const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_SERVICE_Handle *service)
Handle network size estimate clients.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_IDENTITY_DELETE.
Definition: identity.h:225
Client requests deletion of an identity.
Definition: identity.h:220
static void handle_rename_message(void *cls, const struct RenameMessage *rm)
Handler for RENAME message from client, creates new identity.
int GNUNET_CONFIGURATION_get_value_string(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be a string.
const char * new_name
New name.
#define DIR_SEPARATOR
Definition: platform.h:170
#define GNUNET_MESSAGE_TYPE_IDENTITY_LOOKUP_BY_SUFFIX
First message send from identity client to service to lookup a single ego matching the given suffix (...
#define GNUNET_MESSAGE_TYPE_IDENTITY_CREATE
Create new identity (client->service).
static unsigned int size
Size of the "table".
Definition: peer.c:67
static void handle_delete_message(void *cls, const struct DeleteMessage *dm)
Handler for DELETE message from client, creates new identity.
static struct GNUNET_NotificationContext * nc
Notification context, simplifies client broadcasts.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static struct Ego * ego_head
Head of DLL of all egos.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_IDENTITY_SET_DEFAULT.
Definition: identity.h:139
static char * subsystem_cfg_file
Configuration file name where subsystem information is kept.
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
struct GNUNET_NotificationContext * GNUNET_notification_context_create(unsigned int queue_length)
Create a new notification context.
Definition: nc.c:121
Information we keep about each ego.
uint32_t result_code
Status code for the last operation, in NBO.
Definition: identity.h:53
uint16_t name_len
Number of bytes in ego name string including 0-termination, in NBO; 0 if the ego was deleted...
Definition: identity.h:88
Handle to a message queue.
Definition: mq.c:85
static int check_lookup_by_suffix_message(void *cls, const struct LookupMessage *message)
Handler for LOOKUP message from client, sends information about ONE identity to the client immediatel...
uint16_t new_name_len
Number of characters in the new name including 0-termination, in NBO.
Definition: identity.h:209
void GNUNET_notification_context_broadcast(struct GNUNET_NotificationContext *nc, const struct GNUNET_MessageHeader *msg, int can_drop)
Send a message to all subscribers of this context.
Definition: nc.c:189
static void notify_listeners(struct Ego *ego)
Send an updated message for the given ego to all listeners.
configuration data
Definition: configuration.c:84
static int key_cmp(const struct GNUNET_CRYPTO_EcdsaPrivateKey *pk1, const struct GNUNET_CRYPTO_EcdsaPrivateKey *pk2)
Compare the given two private keys for equality.
struct GNUNET_CRYPTO_EcdsaPrivateKey pk
Private key of the ego.
const char * name
uint16_t end_of_list
Usually GNUNET_NO, GNUNET_YES to signal end of list.
Definition: identity.h:93
void GNUNET_CONFIGURATION_iterate_sections(const struct GNUNET_CONFIGURATION_Handle *cfg, GNUNET_CONFIGURATION_Section_Iterator iter, void *iter_cls)
Iterate over all sections in the configuration.
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
#define GNUNET_log(kind,...)
static void handle_start_message(void *cls, const struct GNUNET_MessageHeader *message)
Handler for START message from client, sends information about all identities to the client immediate...
#define GNUNET_MESSAGE_TYPE_IDENTITY_GET_DEFAULT
Client requests to know default identity for a subsystem.
int GNUNET_CONFIGURATION_get_value_filename(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be the name of a file or directory.
#define GNUNET_MESSAGE_TYPE_IDENTITY_RENAME
Rename existing identity (client->service).
static char * ego_directory
Directory where we store the identities.
uint16_t name_len
Number of characters in the name including 0-termination, in NBO.
Definition: identity.h:230
static void handle_get_default_message(void *cls, const struct GetDefaultMessage *gdm)
Handler for GET_DEFAULT message from client, returns default identity for some service.
static int check_get_default_message(void *cls, const struct GetDefaultMessage *msg)
Checks a GNUNET_MESSAGE_TYPE_IDENTITY_GET_DEFAULT message.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_IDENTITY_RENAME.
Definition: identity.h:199
Header for all communications.
void GNUNET_notification_context_destroy(struct GNUNET_NotificationContext *nc)
Destroy the context, force disconnect for all subscribers.
Definition: nc.c:137
#define GNUNET_MESSAGE_TYPE_IDENTITY_RESULT_CODE
Generic response from identity service with success and/or error message.
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:355
const char * old_name
Old name.
Client requests knowledge about default identity for a subsystem from identity service.
Definition: identity.h:108
static struct Ego * ego_tail
Tail of DLL of all egos.
static int process_ego_file(void *cls, const char *filename)
Process the given file from the "EGODIR".
static struct GNUNET_CONFIGURATION_Handle * subsystem_cfg
Handle to subsystem configuration which for each subsystem contains the name of the default ego...
void GNUNET_SERVICE_client_disable_continue_warning(struct GNUNET_SERVICE_Client *c)
Disable the warning the server issues if a message is not acknowledged in a timely fashion...
Definition: service.c:2266
static void handle_ego_rename(void *cls, const char *section)
An ego was renamed; rename it in all subsystems where it is currently set as the default.
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2242
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
static struct GNUNET_MQ_Envelope * create_update_message(struct Ego *ego)
Create an update message with information about the current state of an ego.
#define GNUNET_malloc(size)
Wrapper around malloc.
Answer from service to client about last operation; GET_DEFAULT maybe answered with this message on f...
Definition: identity.h:42
Service informs client about status of a pseudonym.
Definition: identity.h:77
#define GNUNET_free(ptr)
Wrapper around free.
void GNUNET_STRINGS_utf8_tolower(const char *input, char *output)
Convert the utf-8 input string to lower case.
Definition: strings.c:568
#define gettext_noop(String)
Definition: gettext.h:69