GNUnet  0.11.x
gnunet-service-messenger.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2020--2021 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  */
27 
31 #include "messenger_api_message.h"
32 
34 {
37 };
38 
40 
41 static int
43 {
45  return GNUNET_OK;
46 }
47 
48 static void
50 {
51  struct GNUNET_MESSENGER_Client *msg_client = cls;
52 
53  const char *name = ((const char*) msg) + sizeof(*msg);
54 
55  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Handle created with name: %s\n", name);
56 
57  setup_handle_name (msg_client->handle, strlen (name) > 0 ? name : NULL);
58 
60 }
61 
62 static void
64 {
65  struct GNUNET_MESSENGER_Client *msg_client = cls;
66 
67  update_handle (msg_client->handle);
68 
70 }
71 
72 static void
74 {
75  struct GNUNET_MESSENGER_Client *msg_client = cls;
76 
77  GNUNET_SERVICE_client_drop (msg_client->client);
78 }
79 
80 static int
82 {
84  return GNUNET_OK;
85 }
86 
87 static void
89 {
90  struct GNUNET_MESSENGER_Client *msg_client = cls;
91 
92  const char *name = ((const char*) msg) + sizeof(*msg);
93 
94  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Handles name is now: %s\n", name);
95 
96  set_handle_name (msg_client->handle, name);
97 
99 }
100 
101 static void
103 {
104  struct GNUNET_MESSENGER_Client *msg_client = cls;
105 
106  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Opening room: %s\n", GNUNET_h2s (&(msg->key)));
107 
108  if (GNUNET_YES == open_handle_room (msg_client->handle, &(msg->key)))
109  {
110  const struct GNUNET_ShortHashCode *member_id = get_handle_member_id (msg_client->handle, &(msg->key));
111 
112  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Opening room with member id: %s\n", GNUNET_sh2s (member_id));
113 
115  struct GNUNET_MQ_Envelope *env;
116 
118  GNUNET_memcpy(&(response->key), &(msg->key), sizeof(msg->key));
119  GNUNET_MQ_send (msg_client->handle->mq, env);
120  }
121  else
122  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Opening room failed: %s\n", GNUNET_h2s (&(msg->key)));
123 
125 }
126 
127 static void
129 {
130  struct GNUNET_MESSENGER_Client *msg_client = cls;
131 
132  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Entering room: %s, %s\n", GNUNET_h2s (&(msg->key)), GNUNET_i2s (&(msg->door)));
133 
134  if (GNUNET_YES == entry_handle_room (msg_client->handle, &(msg->door), &(msg->key)))
135  {
136  const struct GNUNET_ShortHashCode *member_id = get_handle_member_id (msg_client->handle, &(msg->key));
137 
138  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Entering room with member id: %s\n", GNUNET_sh2s (member_id));
139 
141  struct GNUNET_MQ_Envelope *env;
142 
144  GNUNET_memcpy(&(response->door), &(msg->door), sizeof(msg->door));
145  GNUNET_memcpy(&(response->key), &(msg->key), sizeof(msg->key));
146  GNUNET_MQ_send (msg_client->handle->mq, env);
147  }
148  else
149  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Entrance into room failed: %s, %s\n", GNUNET_h2s (&(msg->key)),
150  GNUNET_i2s (&(msg->door)));
151 
153 }
154 
155 static void
157 {
158  struct GNUNET_MESSENGER_Client *msg_client = cls;
159 
160  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Closing room: %s\n", GNUNET_h2s (&(msg->key)));
161 
162  if (GNUNET_YES == close_handle_room (msg_client->handle, &(msg->key)))
163  {
164  const struct GNUNET_ShortHashCode *member_id = get_handle_member_id (msg_client->handle, &(msg->key));
165 
166  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Closing room with member id: %s\n", GNUNET_sh2s (member_id));
167 
169  struct GNUNET_MQ_Envelope *env;
170 
172  GNUNET_memcpy(&(response->key), &(msg->key), sizeof(msg->key));
173  GNUNET_MQ_send (msg_client->handle->mq, env);
174  }
175  else
176  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Closing room failed: %s\n", GNUNET_h2s (&(msg->key)));
177 
179 }
180 
181 static int
183 {
184  const uint16_t full_length = ntohs (msg->header.size);
185 
186  if (full_length < sizeof(*msg))
187  return GNUNET_NO;
188 
189  const enum GNUNET_MESSENGER_MessageFlags flags = (
191  );
192 
193  const uint16_t length = full_length - sizeof(*msg);
194  const char *buffer = ((const char*) msg) + sizeof(*msg);
195 
196  ssize_t key_length = 0;
197 
198  if (!(flags & GNUNET_MESSENGER_FLAG_PRIVATE))
199  goto check_for_message;
200 
201  struct GNUNET_IDENTITY_PublicKey public_key;
202 
203  key_length = GNUNET_IDENTITY_read_key_from_buffer(&public_key, buffer, length);
204 
205 check_for_message:
206  if (key_length < 0)
207  return GNUNET_NO;
208 
209  const uint16_t msg_length = length - key_length;
210  const char* msg_buffer = buffer + key_length;
211 
212  struct GNUNET_MESSENGER_Message message;
213 
215  return GNUNET_NO;
216 
217  if (GNUNET_YES != decode_message (&message, msg_length, msg_buffer, GNUNET_NO, NULL))
218  return GNUNET_NO;
219 
220  if (GNUNET_YES != filter_message_sending(&message))
221  return GNUNET_NO;
222 
223  return GNUNET_OK;
224 }
225 
226 static void
228 {
229  struct GNUNET_MESSENGER_Client *msg_client = cls;
230 
231  const enum GNUNET_MESSENGER_MessageFlags flags = (
233  );
234 
235  const struct GNUNET_HashCode *key = &(msg->key);
236  const char *buffer = ((const char*) msg) + sizeof(*msg);
237 
238  const uint16_t length = ntohs (msg->header.size) - sizeof(*msg);
239  ssize_t key_length = 0;
240 
241  struct GNUNET_IDENTITY_PublicKey public_key;
242 
243  if (flags & GNUNET_MESSENGER_FLAG_PRIVATE)
245  &public_key, buffer, length
246  );
247 
248  const uint16_t msg_length = length - key_length;
249  const char* msg_buffer = buffer + key_length;
250 
251  struct GNUNET_MESSENGER_Message message;
252  decode_message (&message, msg_length, msg_buffer, GNUNET_NO, NULL);
253 
254  if ((flags & GNUNET_MESSENGER_FLAG_PRIVATE) &&
255  (GNUNET_YES != encrypt_message(&message, &public_key)))
256  {
257  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Encrypting message failed: Message got dropped!\n");
258 
259  goto end_handling;
260  }
261 
262  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending message: %s to %s\n",
264 
265  if (GNUNET_YES != send_handle_message (msg_client->handle, key, &message))
266  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Sending message failed: %s to %s\n",
268 
269 end_handling:
271 }
272 
273 static void
275  const struct GNUNET_MESSENGER_Message *message,
276  const struct GNUNET_HashCode *hash)
277 {
278  struct GNUNET_MESSENGER_Client *msg_client = cls;
279 
280  if (!message)
281  {
282  send_room_message(room, msg_client->handle, create_message_request(hash));
283  return;
284  }
285 
287 
288  struct GNUNET_MESSENGER_Member *member = get_store_member_of(store, message);
289 
290  if (!member)
291  {
292  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Sender of message (%s) unknown!\n", GNUNET_h2s (hash));
293  return;
294  }
295 
296  struct GNUNET_MESSENGER_MemberSession *session = get_member_session_of(member, message, hash);
297 
298  if (session)
299  notify_handle_message (msg_client->handle, get_room_key(room), session, message, hash);
300 }
301 
302 static void
304 {
305  struct GNUNET_MESSENGER_Client *msg_client = cls;
306 
307  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Requesting message from room: %s\n", GNUNET_h2s (&(msg->key)));
308 
309  struct GNUNET_MESSENGER_SrvRoom *room = get_service_room (messenger, &(msg->key));
310 
311  if (!room)
312  {
313  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Room not found: %s\n", GNUNET_h2s (&(msg->key)));
314  goto end_handling;
315  }
316 
317  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
318 
319  struct GNUNET_MESSENGER_Member *member = get_store_member(member_store, get_handle_member_id(
320  msg_client->handle, &(msg->key)
321  ));
322 
323  if (!member)
324  {
325  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Member not valid to request a message!\n");
326  goto end_handling;
327  }
328 
329  struct GNUNET_MESSENGER_MemberSession *session = get_member_session(member, &(get_handle_ego(msg_client->handle)->pub));
330 
331  if (!session)
332  {
333  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Session not valid to request a message!\n");
334  goto end_handling;
335  }
336 
337  request_room_message (room, &(msg->hash), session, callback_found_message, msg_client);
338 
339 end_handling:
341 }
342 
343 static void*
345 {
346  struct GNUNET_MESSENGER_Client *msg_client = GNUNET_new(struct GNUNET_MESSENGER_Client);
347 
348  msg_client->client = client;
349  msg_client->handle = add_service_handle (messenger, mq);
350 
351  return msg_client;
352 }
353 
354 static void
355 callback_client_disconnect (void *cls, struct GNUNET_SERVICE_Client *client, void *internal_cls)
356 {
357  struct GNUNET_MESSENGER_Client *msg_client = internal_cls;
358 
359  remove_service_handle (messenger, msg_client->handle);
360 
361  GNUNET_free(msg_client);
362 }
363 
371 static void
373 {
374  messenger = create_service (config, service);
375 
376  if (!messenger)
378 }
379 
386  &run,
389  NULL,
struct GNUNET_MESSENGER_MessageHeader header
Header.
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
static struct GNUNET_SERVICE_Handle * service
Handle to our service instance.
GNUnet MESSENGER service.
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
static void callback_client_disconnect(void *cls, struct GNUNET_SERVICE_Client *client, void *internal_cls)
GNUnet MESSENGER service.
static void handle_room_entry(void *cls, const struct GNUNET_MESSENGER_RoomMessage *msg)
#define GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_UPDATE
void setup_handle_name(struct GNUNET_MESSENGER_SrvHandle *handle, const char *name)
Tries to set the name and EGO key of a handle initially by looking up a specific name.
Handle to a service.
Definition: service.c:116
static void handle_room_open(void *cls, const struct GNUNET_MESSENGER_RoomMessage *msg)
struct GNUNET_MESSENGER_MemberSession * get_member_session(const struct GNUNET_MESSENGER_Member *member, const struct GNUNET_IDENTITY_PublicKey *public_key)
Returns the member session of a member identified by a given public key.
struct GNUNET_SERVICE_Client * client
ssize_t GNUNET_IDENTITY_read_key_from_buffer(struct GNUNET_IDENTITY_PublicKey *key, const void *buffer, size_t len)
Reads a GNUNET_IDENTITY_PublicKey from a compact buffer.
Definition: identity_api.c:994
struct GNUNET_PeerIdentity door
static int check_set_name(void *cls, const struct GNUNET_MESSENGER_NameMessage *msg)
int decode_message(struct GNUNET_MESSENGER_Message *message, uint16_t length, const char *buffer, int include_signature, uint16_t *padding)
Decodes a message from a given buffer of a maximal length in bytes.
#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)
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
#define GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_CREATE
static void run(void *cls, const struct GNUNET_CONFIGURATION_Handle *config, struct GNUNET_SERVICE_Handle *service)
Setup MESSENGER internals.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
static int check_create(void *cls, const struct GNUNET_MESSENGER_CreateMessage *msg)
int send_room_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, struct GNUNET_MESSENGER_Message *message)
Sends a message from a given handle into a room.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
GNUnet MESSENGER service.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:531
struct GNUNET_MESSENGER_SrvHandle * add_service_handle(struct GNUNET_MESSENGER_Service *service, struct GNUNET_MQ_Handle *mq)
Creates and adds a new handle to a service using a given message queue.
struct GNUNET_MESSENGER_Service * messenger
static void handle_destroy(void *cls, const struct GNUNET_MESSENGER_DestroyMessage *msg)
struct GNUNET_MESSENGER_MemberStore * get_room_member_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used member store of a given room.
A 256-bit hashcode.
Handle to a client that is connected to a service.
Definition: service.c:250
GNUNET_MESSENGER_MessageFlags
Enum for the different supported flags used by message handling.
static void handle_get_message(void *cls, const struct GNUNET_MESSENGER_GetMessage *msg)
Message to send something into a room.
struct GNUNET_MessageHeader header
struct GNUNET_MESSENGER_SrvRoom * get_service_room(const struct GNUNET_MESSENGER_Service *service, const struct GNUNET_HashCode *key)
Returns the room identified by a given key for a service.
#define GNUNET_MQ_check_zero_termination(m)
Insert code for a "check_" function that verifies that a given variable-length message received over ...
int request_room_message(struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_HashCode *hash, const struct GNUNET_MESSENGER_MemberSession *session, GNUNET_MESSENGER_MessageRequestCallback callback, void *cls)
Requests a message from a room identified by a given hash.
int open_handle_room(struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key)
Makes a given handle a member of the room using a specific key and opens the room from the handles se...
uint16_t get_message_kind_size(enum GNUNET_MESSENGER_MessageKind kind)
Returns the minimal size in bytes to encode a message of a specific kind.
struct GNUNET_MESSENGER_Message * create_message_request(const struct GNUNET_HashCode *hash)
Creates and allocates a new request message containing the hash of a missing message.
struct GNUNET_IDENTITY_PublicKey pub
static int check_send_message(void *cls, const struct GNUNET_MESSENGER_SendMessage *msg)
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
int filter_message_sending(const struct GNUNET_MESSENGER_Message *message)
Returns if a specific kind of message should be sent by a client.
static void handle_update(void *cls, const struct GNUNET_MESSENGER_UpdateMessage *msg)
Message to create a handle for a client.
int close_handle_room(struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key)
Removes the membership of the room using a specific key and closes it if no other handle from this se...
#define GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_SET_NAME
static const int key_length
Fixed size of the public/private keys.
Definition: gnunet-abd.c:211
const char * GNUNET_MESSENGER_name_of_kind(enum GNUNET_MESSENGER_MessageKind kind)
Get the name of a message kind.
Definition: messenger_api.c:35
static const struct GNUNET_CONFIGURATION_Handle * config
#define GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_CLOSE
static void handle_create(void *cls, const struct GNUNET_MESSENGER_CreateMessage *msg)
A 512-bit hashcode.
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2325
static void handle_send_message(void *cls, const struct GNUNET_MESSENGER_SendMessage *msg)
void notify_handle_message(struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key, const struct GNUNET_MESSENGER_MemberSession *session, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Notifies the handle that a new message was received or sent.
void update_handle(struct GNUNET_MESSENGER_SrvHandle *handle)
Tries to change the key pair of an EGO of a handle under the same name and informs all rooms about th...
struct GNUNET_HashCode key
The key used in the DHT.
static const char * get_message(void **buf, int *len, void *cls)
void remove_service_handle(struct GNUNET_MESSENGER_Service *service, struct GNUNET_MESSENGER_SrvHandle *handle)
Removes a handle from a service and destroys it.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
Message to update the handle (its EGO key) for a client.
Message to destroy the handle for a client.
int send_handle_message(struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key, const struct GNUNET_MESSENGER_Message *message)
Sends a message from a given handle to the room using a specific key.
#define GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_DESTROY
#define GNUNET_MESSENGER_SERVICE_NAME
Identifier of 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.
Handle to a message queue.
Definition: mq.c:85
#define GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_SEND_MESSAGE
#define GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_OPEN
An identity key as per LSD0001.
#define GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_GET_MESSAGE
configuration data
Definition: configuration.c:84
const char * name
Message to receive the current name of a handle.
void set_handle_name(struct GNUNET_MESSENGER_SrvHandle *handle, const char *name)
Tries to rename the handle which implies renaming the EGO its using and moving all related data into ...
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
#define GNUNET_log(kind,...)
Message to request something from a room.
static struct MHD_Response * response
Our canonical response.
static void send_message(struct PeerContext *peer_ctx, struct GNUNET_MQ_Envelope *ev, const char *type)
Send a message to another peer.
GNUNET_SERVICE_MAIN(GNUNET_MESSENGER_SERVICE_NAME, GNUNET_SERVICE_OPTION_NONE, &run, &callback_client_connect, &callback_client_disconnect, NULL, GNUNET_MQ_hd_var_size(create, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_CREATE, struct GNUNET_MESSENGER_CreateMessage, NULL), GNUNET_MQ_hd_fixed_size(update, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_UPDATE, struct GNUNET_MESSENGER_UpdateMessage, NULL), GNUNET_MQ_hd_fixed_size(destroy, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_DESTROY, struct GNUNET_MESSENGER_DestroyMessage, NULL), GNUNET_MQ_hd_var_size(set_name, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_SET_NAME, struct GNUNET_MESSENGER_NameMessage, NULL), GNUNET_MQ_hd_fixed_size(room_open, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_OPEN, struct GNUNET_MESSENGER_RoomMessage, NULL), GNUNET_MQ_hd_fixed_size(room_entry, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_ENTRY, struct GNUNET_MESSENGER_RoomMessage, NULL), GNUNET_MQ_hd_fixed_size(room_close, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_CLOSE, struct GNUNET_MESSENGER_RoomMessage, NULL), GNUNET_MQ_hd_var_size(send_message, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_SEND_MESSAGE, struct GNUNET_MESSENGER_SendMessage, NULL), GNUNET_MQ_hd_fixed_size(get_message, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_GET_MESSAGE, struct GNUNET_MESSENGER_GetMessage, NULL), GNUNET_MQ_handler_end())
Define "main" method using service macro.
const struct GNUNET_HashCode * get_room_key(const struct GNUNET_MESSENGER_SrvRoom *room)
Returns the shared secret you need to access a room.
#define GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_ENTRY
const struct GNUNET_ShortHashCode * get_handle_member_id(const struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key)
Returns the member id of a given handle in a specific room.
struct GNUNET_MESSENGER_Service * create_service(const struct GNUNET_CONFIGURATION_Handle *config, struct GNUNET_SERVICE_Handle *service_handle)
Creates and allocates a new service using a given config and a GNUnet service handle.
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
static void callback_found_message(void *cls, struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
static void handle_room_close(void *cls, const struct GNUNET_MESSENGER_RoomMessage *msg)
static void destroy(void *cls)
static void handle_set_name(void *cls, const struct GNUNET_MESSENGER_NameMessage *msg)
int encrypt_message(struct GNUNET_MESSENGER_Message *message, const struct GNUNET_IDENTITY_PublicKey *key)
Encrypts a message using a given public key and replaces its body and kind with the now private encry...
int entry_handle_room(struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_PeerIdentity *door, const struct GNUNET_HashCode *key)
Makes a given handle a member of the room using a specific key and enters the room through a tunnel t...
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.
struct GNUNET_MESSENGER_MemberSession * get_member_session_of(struct GNUNET_MESSENGER_Member *member, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Returns the member session of a member using a public key which can verify the signature of a given m...
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2244
General message to confirm interaction with a room.
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
struct GNUNET_MESSENGER_SrvHandle * handle
const struct GNUNET_MESSENGER_Ego * get_handle_ego(const struct GNUNET_MESSENGER_SrvHandle *handle)
Returns the EGO used by a given handle.
GNUnet MESSENGER service.
#define GNUNET_free(ptr)
Wrapper around free.
messenger api: client and service implementation of GNUnet MESSENGER service
enum GNUNET_MESSENGER_MessageKind kind
The kind of the message.
static void * callback_client_connect(void *cls, struct GNUNET_SERVICE_Client *client, struct GNUNET_MQ_Handle *mq)