GNUnet  0.19.2
gnunet-service-messenger_member_store.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2020--2022 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  */
26 #include "platform.h"
28 
32 
33 void
35  struct GNUNET_MESSENGER_SrvRoom *room)
36 {
37  GNUNET_assert ((store) && (room));
38 
39  store->room = room;
41 }
42 
43 static int
45  const struct GNUNET_ShortHashCode *key,
46  void *value)
47 {
48  struct GNUNET_MESSENGER_Member *member = value;
49  destroy_member(member);
50  return GNUNET_YES;
51 }
52 
53 void
55 {
56  GNUNET_assert ((store) && (store->members));
57 
60 }
61 
62 
65 {
66  GNUNET_assert ((store) && (store->room));
67 
68  struct GNUNET_MESSENGER_SrvRoom *room = store->room;
69 
70  return get_service_contact_store(room->service);
71 }
72 
73 const struct GNUNET_HashCode*
75 {
76  GNUNET_assert (store);
77 
78  return get_srv_room_key((const struct GNUNET_MESSENGER_SrvRoom*) store->room);
79 }
80 
81 static int
83  const char *filename)
84 {
85  struct GNUNET_MESSENGER_MemberStore *store = cls;
86 
88  {
89  char *directory;
90 
91  GNUNET_asprintf (&directory, "%s%c", filename, DIR_SEPARATOR);
92 
93  load_member(store, directory);
94 
95  GNUNET_free(directory);
96  }
97 
98  return GNUNET_OK;
99 }
100 
101 static int
103  const struct GNUNET_ShortHashCode *id,
104  void *value)
105 {
106  const char *sync_dir = cls;
107 
108  struct GNUNET_MESSENGER_Member *member = value;
109 
110  if (!member)
111  return GNUNET_YES;
112 
113  char *member_dir;
114  GNUNET_asprintf (&member_dir, "%s%s%c", sync_dir, GNUNET_sh2s(id), DIR_SEPARATOR);
115 
116  if (GNUNET_YES == GNUNET_DISK_directory_test (member_dir, GNUNET_YES))
117  load_member_next_sessions (member, member_dir);
118 
119  GNUNET_free(member_dir);
120  return GNUNET_YES;
121 }
122 
123 static int
125  const struct GNUNET_ShortHashCode *id,
126  void *value)
127 {
128  struct GNUNET_MESSENGER_Member *member = value;
129 
130  if (!member)
131  return GNUNET_YES;
132 
133  sync_member_contacts (member);
134  return GNUNET_YES;
135 }
136 
137 void
139  const char *directory)
140 {
141  GNUNET_assert ((store) && (directory));
142 
143  char *scan_dir;
144  GNUNET_asprintf (&scan_dir, "%s%s%c", directory, "members", DIR_SEPARATOR);
145 
148 
151 
153 }
154 
155 static int
157  const struct GNUNET_ShortHashCode *id,
158  void *value)
159 {
160  const char *save_dir = cls;
161 
162  struct GNUNET_MESSENGER_Member *member = value;
163 
164  if (!member)
165  return GNUNET_YES;
166 
167  char *member_dir;
168  GNUNET_asprintf (&member_dir, "%s%s%c", save_dir, GNUNET_sh2s(id), DIR_SEPARATOR);
169 
170  if ((GNUNET_YES == GNUNET_DISK_directory_test (member_dir, GNUNET_NO)) ||
171  (GNUNET_OK == GNUNET_DISK_directory_create (member_dir)))
172  save_member(member, member_dir);
173 
174  GNUNET_free(member_dir);
175  return GNUNET_YES;
176 }
177 
178 void
180  const char *directory)
181 {
182  GNUNET_assert ((store) && (directory));
183 
184  char* save_dir;
185  GNUNET_asprintf (&save_dir, "%s%s%c", directory, "members", DIR_SEPARATOR);
186 
187  if ((GNUNET_YES == GNUNET_DISK_directory_test (save_dir, GNUNET_NO)) ||
188  (GNUNET_OK == GNUNET_DISK_directory_create (save_dir)))
190 
191  GNUNET_free(save_dir);
192 }
193 
196  const struct GNUNET_ShortHashCode *id)
197 {
198  GNUNET_assert ((store) && (store->members) && (id));
199 
201 }
202 
205  const struct GNUNET_MESSENGER_Message *message)
206 {
207  if ((GNUNET_MESSENGER_KIND_INFO == message->header.kind) ||
208  (GNUNET_MESSENGER_KIND_JOIN == message->header.kind))
209  return add_store_member(store, &(message->header.sender_id));
210  else
211  return get_store_member(store, &(message->header.sender_id));
212 }
213 
216  const struct GNUNET_ShortHashCode *id)
217 {
218  GNUNET_assert ((store) && (store->members));
219 
220  struct GNUNET_MESSENGER_Member *member = id? get_store_member(store, id) : NULL;
221 
222  if (member)
223  return member;
224 
225  member = create_member(store, id);
226 
227  if (!member)
228  return NULL;
229 
232  {
233  destroy_member(member);
234  return NULL;
235  }
236 
237  return member;
238 }
239 
242  void *cls;
243 };
244 
245 static int
247  const struct GNUNET_ShortHashCode *key,
248  void *value)
249 {
251  struct GNUNET_MESSENGER_Member *member = value;
252 
253  return iterate_member_sessions(member, iterate->it, iterate->cls);
254 }
255 
256 int
259  void* cls)
260 {
261  GNUNET_assert ((store) && (store->members) && (it));
262 
264 
265  iterate.it = it;
266  iterate.cls = cls;
267 
269 }
struct GNUNET_HashCode key
The key used in the DHT.
static char * filename
static char * value
Value of the record to add/remove.
struct GNUNET_MESSENGER_Member * create_member(struct GNUNET_MESSENGER_MemberStore *store, const struct GNUNET_ShortHashCode *id)
Creates and allocates a new member of a room with an optionally defined or random id.
void save_member(struct GNUNET_MESSENGER_Member *member, const char *directory)
Saves data from a member into a directory which can be load to restore the member completely.
void destroy_member(struct GNUNET_MESSENGER_Member *member)
Destroys a member and frees its memory fully.
void load_member_next_sessions(const struct GNUNET_MESSENGER_Member *member, const char *directory)
Loads data about next sessions from a directory into an empty loaded member which does not contain a ...
void sync_member_contacts(struct GNUNET_MESSENGER_Member *member)
Synchronizes contacts between all sessions from a given member and other sessions which are linked to...
int iterate_member_sessions(struct GNUNET_MESSENGER_Member *member, GNUNET_MESSENGER_MemberIteratorCallback it, void *cls)
Iterate through all member sessions currently connected to a given member and call the provided itera...
const struct GNUNET_ShortHashCode * get_member_id(const struct GNUNET_MESSENGER_Member *member)
Returns the current id of a given member.
void load_member(struct GNUNET_MESSENGER_MemberStore *store, const char *directory)
Loads data from a directory into a new allocated and created member of a store if the required inform...
GNUnet MESSENGER service.
struct GNUNET_MESSENGER_Member * get_store_member_of(struct GNUNET_MESSENGER_MemberStore *store, const struct GNUNET_MESSENGER_Message *message)
Returns the member of a store using a sender id of a given message.
static int iterate_sync_member_contacts(void *cls, const struct GNUNET_ShortHashCode *id, void *value)
int iterate_store_members(struct GNUNET_MESSENGER_MemberStore *store, GNUNET_MESSENGER_MemberIteratorCallback it, void *cls)
Iterate through all member sessions currently connected to the members of the given member store and ...
void save_member_store(struct GNUNET_MESSENGER_MemberStore *store, const char *directory)
Saves members from a member store into a directory.
void load_member_store(struct GNUNET_MESSENGER_MemberStore *store, const char *directory)
Loads members from a directory into a member store.
struct GNUNET_MESSENGER_Member * get_store_member(const struct GNUNET_MESSENGER_MemberStore *store, const struct GNUNET_ShortHashCode *id)
Returns the member in a store identified by a given id.
static int iterate_destroy_members(void *cls, const struct GNUNET_ShortHashCode *key, void *value)
static int iterate_load_next_member_sessions(void *cls, const struct GNUNET_ShortHashCode *id, void *value)
const struct GNUNET_HashCode * get_member_store_key(const struct GNUNET_MESSENGER_MemberStore *store)
Returns the shared secret you need to access a room of the store.
static int iterate_store_members_it(void *cls, const struct GNUNET_ShortHashCode *key, void *value)
struct GNUNET_MESSENGER_ContactStore * get_member_contact_store(struct GNUNET_MESSENGER_MemberStore *store)
Returns the used contact store of a given member store.
static int iterate_save_members(void *cls, const struct GNUNET_ShortHashCode *id, void *value)
void init_member_store(struct GNUNET_MESSENGER_MemberStore *store, struct GNUNET_MESSENGER_SrvRoom *room)
Initializes a member store as fully empty connected to a room.
struct GNUNET_MESSENGER_Member * add_store_member(struct GNUNET_MESSENGER_MemberStore *store, const struct GNUNET_ShortHashCode *id)
Adds a member to a store under a specific id and returns it on success.
void clear_member_store(struct GNUNET_MESSENGER_MemberStore *store)
Clears a member store, wipes its content and deallocates its memory.
static int callback_scan_for_members(void *cls, const char *filename)
int(* GNUNET_MESSENGER_MemberIteratorCallback)(void *cls, const struct GNUNET_IDENTITY_PublicKey *public_key, struct GNUNET_MESSENGER_MemberSession *session)
const struct GNUNET_HashCode * get_srv_room_key(const struct GNUNET_MESSENGER_SrvRoom *room)
Returns the shared secret you need to access a room.
GNUnet MESSENGER service.
struct GNUNET_MESSENGER_ContactStore * get_service_contact_store(struct GNUNET_MESSENGER_Service *service)
Returns the used contact store of a given service.
GNUnet MESSENGER service.
enum GNUNET_GenericReturnValue GNUNET_DISK_directory_test(const char *fil, int is_readable)
Test if fil is a directory and listable.
Definition: disk.c:403
enum GNUNET_GenericReturnValue GNUNET_DISK_directory_create(const char *dir)
Implementation of "mkdir -p".
Definition: disk.c:495
int GNUNET_DISK_directory_scan(const char *dir_name, GNUNET_FileNameCallback callback, void *callback_cls)
Scan a directory for files.
Definition: disk.c:813
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multishortmap_put(struct GNUNET_CONTAINER_MultiShortmap *map, const struct GNUNET_ShortHashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
int GNUNET_CONTAINER_multishortmap_iterate(struct GNUNET_CONTAINER_MultiShortmap *map, GNUNET_CONTAINER_ShortmapIterator it, void *it_cls)
Iterate over all entries in the map.
struct GNUNET_CONTAINER_MultiShortmap * GNUNET_CONTAINER_multishortmap_create(unsigned int len, int do_not_copy_keys)
Create a multi peer map (hash map for public keys of peers).
void GNUNET_CONTAINER_multishortmap_destroy(struct GNUNET_CONTAINER_MultiShortmap *map)
Destroy a hash map.
void * GNUNET_CONTAINER_multishortmap_get(const struct GNUNET_CONTAINER_MultiShortmap *map, const struct GNUNET_ShortHashCode *key)
Given a key find a value in the map matching the key.
@ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST
, ' bother checking if a value already exists (faster than GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE...
@ GNUNET_OK
@ GNUNET_YES
@ GNUNET_NO
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
#define GNUNET_free(ptr)
Wrapper around free.
@ GNUNET_MESSENGER_KIND_INFO
The info kind.
@ GNUNET_MESSENGER_KIND_JOIN
The join kind.
#define DIR_SEPARATOR
Definition: platform.h:164
A 512-bit hashcode.
struct GNUNET_CONTAINER_MultiShortmap * members
struct GNUNET_MESSENGER_MemberStore * store
enum GNUNET_MESSENGER_MessageKind kind
The kind of the message.
struct GNUNET_ShortHashCode sender_id
The senders id inside of the room the message was sent in.
struct GNUNET_MESSENGER_MessageHeader header
Header.
struct GNUNET_MESSENGER_Service * service
A 256-bit hashcode.