GNUnet 0.22.0
gnunet-service-messenger_tunnel.c
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1/*
2 This file is part of GNUnet.
3 Copyright (C) 2020--2024 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
35
36#include "messenger_api_util.h"
37
40 const struct GNUNET_PeerIdentity *door)
41{
42 struct GNUNET_MESSENGER_SrvTunnel *tunnel;
43
44 GNUNET_assert ((room) && (door));
45
46 tunnel = GNUNET_new (struct GNUNET_MESSENGER_SrvTunnel);
47
48 tunnel->room = room;
49 tunnel->channel = NULL;
50
51 tunnel->peer = GNUNET_PEER_intern (door);
52
53 tunnel->messenger_version = 0;
54
55 tunnel->peer_message = NULL;
56
57 init_message_state (&(tunnel->state));
58
59 return tunnel;
60}
61
62
63void
65{
66 GNUNET_assert (tunnel);
67
68 if (tunnel->channel)
70
71 GNUNET_PEER_change_rc (tunnel->peer, -1);
72
73 if (tunnel->peer_message)
74 GNUNET_free (tunnel->peer_message);
75
76 clear_message_state (&(tunnel->state));
77
78 GNUNET_free (tunnel);
79}
80
81
82void
85{
86 GNUNET_assert (tunnel);
87
88 if (tunnel->channel)
90
91 tunnel->channel = channel;
92}
93
94
95void
97 const struct GNUNET_CADET_Channel *channel)
98{
99 struct GNUNET_MESSENGER_SrvTunnel *tunnel;
100 struct GNUNET_MESSENGER_SrvRoom *room;
102
103 tunnel = cls;
104
105 if (! tunnel)
106 return;
107
108 tunnel->channel = NULL;
109
110 GNUNET_assert (tunnel->room);
111
112 room = tunnel->room;
113
114 if (! room->host)
115 return;
116
118
120 &identity,
121 tunnel)) ||
123 &identity)))
124 return;
125
128
131 return;
132
133 {
134 struct GNUNET_MESSENGER_ListTunnel *element;
135 element = find_list_tunnels_alternate (&(room->basement), &identity);
136
137 if (! element)
138 return;
139
140 GNUNET_PEER_resolve (element->peer, &identity);
141 }
142
143 enter_srv_room_at (room, room->host, &identity);
144}
145
146
149 struct GNUNET_MESSENGER_Message *message,
150 struct GNUNET_HashCode *hash)
151{
152 const struct GNUNET_MESSENGER_Message *previous;
153
154 GNUNET_assert ((room) && (message));
155
157 {
159 "Message error: Kind is unknown! (%d)\n", message->header.kind);
160 return GNUNET_SYSERR;
161 }
162
163 {
164 struct GNUNET_MESSENGER_MessageStore *message_store;
165
166 message_store = get_srv_room_message_store (room);
167
168 previous = get_store_message (
169 message_store, &(message->header.previous));
170 }
171
172 if (! previous)
173 goto skip_time_comparison;
174
175 {
177 struct GNUNET_TIME_Absolute last;
178
180 last = GNUNET_TIME_absolute_ntoh (previous->header.timestamp);
181
182 if (GNUNET_TIME_relative_get_zero_ ().rel_value_us !=
184 {
186 "Message warning: Timestamp does not check out!\n");
187 }
188 }
189
190skip_time_comparison:
191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Receiving message of kind: %s!\n",
193
194 return GNUNET_OK;
195}
196
199 const struct GNUNET_MessageHeader *header)
200{
201 struct GNUNET_MESSENGER_SrvTunnel *tunnel;
202 struct GNUNET_MESSENGER_Message message;
203 struct GNUNET_HashCode hash;
204 uint16_t length;
205 const char *buffer;
206
207 GNUNET_assert (header);
208
209 tunnel = cls;
210
211 if (! tunnel)
212 return GNUNET_SYSERR;
213
214 length = ntohs (header->size) - sizeof(*header);
215 buffer = (const char*) &header[1];
216
218 GNUNET_YES))
219 {
221 "Tunnel error: Message too short! (%d)\n", length);
222 return GNUNET_SYSERR;
223 }
224
225 {
226 uint16_t padding;
227 padding = 0;
228
229 if (GNUNET_YES != decode_message (&message, length, buffer, GNUNET_YES,
230 &padding))
231 {
232 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel error: Decoding failed!\n");
233 return GNUNET_SYSERR;
234 }
235
236 hash_message (&message, length - padding, buffer, &hash);
237 }
238
239 return verify_tunnel_message (tunnel->room, &message, &hash);
240}
241
242
245 struct GNUNET_MESSENGER_Message *message,
246 const struct GNUNET_HashCode *hash);
247
248extern void
250 const struct GNUNET_MESSENGER_Message *message,
251 const struct GNUNET_HashCode *hash);
252
253static void
255 const struct GNUNET_HashCode *hash)
256{
257 struct GNUNET_MESSENGER_OperationStore *operation_store;
258 enum GNUNET_GenericReturnValue requested;
259
260 GNUNET_assert ((tunnel) && (hash));
261
262 operation_store = get_srv_room_operation_store (tunnel->room);
263
264 requested = (GNUNET_MESSENGER_OP_REQUEST ==
265 get_store_operation_type (operation_store, hash)?
267
268 {
269 struct GNUNET_MESSENGER_MessageStore *message_store;
270 const struct GNUNET_MESSENGER_Message *message;
271
272 message_store = get_srv_room_message_store (tunnel->room);
273 message = get_store_message (message_store, hash);
274
275 if (! message)
276 return;
277
278 update_message_state (&(tunnel->state), requested, message, hash);
279 }
280}
281
282
283void
285{
286 struct GNUNET_MESSENGER_SrvTunnel *tunnel;
287 struct GNUNET_MESSENGER_Message message;
288 struct GNUNET_HashCode hash;
289 uint16_t length;
290 const char *buffer;
291
292 GNUNET_assert (header);
293
294 tunnel = cls;
295
296 if (! tunnel)
297 return;
298
299 length = ntohs (header->size) - sizeof(*header);
300 buffer = (const char*) &header[1];
301
302 {
303 uint16_t padding;
304 padding = 0;
305
306 decode_message (&message, length, buffer, GNUNET_YES, &padding);
307 hash_message (&message, length - padding, buffer, &hash);
308 }
309
310 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got message of kind: %s!\n",
312
313 {
314 enum GNUNET_GenericReturnValue new_message;
315 new_message = update_room_message (tunnel->room,
316 copy_message (&message),
317 &hash);
318
319 if (GNUNET_YES != new_message)
320 goto receive_done;
321 }
322
323 update_tunnel_last_message (tunnel, &hash);
324
325 {
326 enum GNUNET_GenericReturnValue forward_message;
327 forward_message = GNUNET_YES;
328
329 switch (message.header.kind)
330 {
332 forward_message = recv_message_info (tunnel->room, tunnel, &message, &hash);
333 break;
335 forward_message = recv_message_peer (tunnel->room, tunnel, &message, &hash);
336 break;
338 forward_message = recv_message_miss (tunnel->room, tunnel, &message, &hash);
339 break;
341 forward_message = recv_message_request (tunnel->room, tunnel, &message,
342 &hash);
343 break;
344 default:
345 break;
346 }
347
348 if (GNUNET_YES == forward_message)
349 {
350 forward_srv_room_message (tunnel->room, tunnel, &message, &hash);
351 callback_room_handle_message (tunnel->room, &message, &hash);
352 }
353 }
354
355receive_done:
356 cleanup_message (&message);
357
359}
360
361
364{
365 const struct GNUNET_PeerIdentity *door;
367 const struct GNUNET_HashCode *key;
368
369
370 GNUNET_assert (tunnel);
371
372 if (tunnel->channel)
373 return GNUNET_NO;
374
375 door = GNUNET_PEER_resolve2 (tunnel->peer);
376 cadet = get_srv_room_cadet (tunnel->room);
377 key = get_srv_room_key (tunnel->room);
378
379 {
380 struct GNUNET_HashCode port;
382 tunnel_message,
384 struct
387
389 tunnel->channel = GNUNET_CADET_channel_create (cadet, tunnel, door, &port,
390 NULL,
392 handlers);
393 }
394
395 return GNUNET_YES;
396}
397
398
399void
401{
402 GNUNET_assert (tunnel);
403
404 if (tunnel->channel)
405 {
407
408 tunnel->channel = NULL;
409 }
410}
411
412
415{
416 GNUNET_assert (tunnel);
417
418 return (tunnel->channel ? GNUNET_YES : GNUNET_NO);
419}
420
421
423{
426};
427
428static void
430{
431 struct GNUNET_MESSENGER_MessageSent *sent;
432
433 GNUNET_assert (cls);
434
435 sent = cls;
436
437 if (sent->tunnel)
438 update_tunnel_last_message (sent->tunnel, &(sent->hash));
439
440 GNUNET_free (sent);
441}
442
443
444void
446 struct GNUNET_MQ_Envelope *env,
447 const struct GNUNET_HashCode *hash)
448{
449 struct GNUNET_MQ_Handle *mq;
450 struct GNUNET_MESSENGER_MessageSent *sent;
451
452 GNUNET_assert ((tunnel) && (env) && (hash));
453
456
457 GNUNET_memcpy (&(sent->hash), hash, sizeof(struct GNUNET_HashCode));
458
459 sent->tunnel = tunnel;
460
463}
464
465
468 void *handle,
469 struct GNUNET_MESSENGER_Message *message)
470{
471 struct GNUNET_HashCode hash;
472 struct GNUNET_MQ_Envelope *env;
473
474 GNUNET_assert ((tunnel) && (handle));
475
476 if (! message)
477 return GNUNET_NO;
478
480 tunnel->room, (struct GNUNET_MESSENGER_SrvHandle*) handle,
482 );
483
484 destroy_message (message);
485
486 if (! env)
487 return GNUNET_NO;
488
489 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending tunnel message: %s\n",
490 GNUNET_h2s (&hash));
491
492 send_tunnel_envelope (tunnel, env, &hash);
493 return GNUNET_YES;
494}
495
496
497void
499 const struct GNUNET_MESSENGER_Message *message,
500 const struct GNUNET_HashCode *hash)
501{
502 struct GNUNET_MESSENGER_Message *copy;
503 struct GNUNET_MQ_Envelope *env;
504
505 GNUNET_assert ((tunnel) && (message) && (hash));
506
507 copy = copy_message (message);
509 NULL);
510
511 destroy_message (copy);
512
513 if (! env)
514 return;
515
516 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Forwarding tunnel message: %s\n",
517 GNUNET_h2s (hash));
518
519 send_tunnel_envelope (tunnel, env, hash);
520}
521
522
523const struct GNUNET_HashCode*
525{
526 GNUNET_assert (tunnel);
527
528 return tunnel->peer_message;
529}
530
531
532void
534 struct GNUNET_PeerIdentity *peer)
535{
536 GNUNET_assert (tunnel);
537
538 GNUNET_PEER_resolve (tunnel->peer, peer);
539}
540
541
542uint32_t
544{
545 GNUNET_assert (tunnel);
546
547 return tunnel->messenger_version;
548}
549
550
553 uint32_t version)
554{
555 GNUNET_assert (tunnel);
556
557 if (version != GNUNET_MESSENGER_VERSION)
558 return GNUNET_SYSERR;
559
560 if (version > tunnel->messenger_version)
561 tunnel->messenger_version = version;
562
563 return GNUNET_OK;
564}
struct GNUNET_MQ_MessageHandlers handlers[]
Definition: 003.c:1
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static uint16_t port
Port number.
Definition: gnunet-bcd.c:147
static uint64_t timestamp(void)
Get current timestamp.
struct GNUNET_HashCode key
The key used in the DHT.
static struct GNUNET_IDENTITY_Handle * identity
Which namespace do we publish to? NULL if we do not publish to a namespace.
static struct GNUNET_CADET_Handle * cadet
Handle for cadet.
struct GNUNET_MESSENGER_Message * create_message_miss(const struct GNUNET_PeerIdentity *peer)
Creates and allocates a new miss message containing the missing peer identity.
enum GNUNET_GenericReturnValue recv_message_request(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received request message by checking for the requested message and forwarding it back if th...
enum GNUNET_GenericReturnValue recv_message_miss(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received miss message to react to activity in the basement of a room.
enum GNUNET_GenericReturnValue recv_message_info(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received info message to change the current member id to the one generated by the host conn...
enum GNUNET_GenericReturnValue recv_message_peer(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Handles a received peer message to link it to its origin tunnel if the peer identity matches.
void clear_message_state(struct GNUNET_MESSENGER_MessageState *state)
void init_message_state(struct GNUNET_MESSENGER_MessageState *state)
void update_message_state(struct GNUNET_MESSENGER_MessageState *state, enum GNUNET_GenericReturnValue requested, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
const struct GNUNET_MESSENGER_Message * get_store_message(struct GNUNET_MESSENGER_MessageStore *store, const struct GNUNET_HashCode *hash)
Returns the message from a message store matching a given hash.
enum GNUNET_MESSENGER_OperationType get_store_operation_type(const struct GNUNET_MESSENGER_OperationStore *store, const struct GNUNET_HashCode *hash)
Returns the type of the active operation under a given hash in a specific operation store.
struct GNUNET_MESSENGER_MessageStore * get_srv_room_message_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used message store of a given room.
enum GNUNET_GenericReturnValue enter_srv_room_at(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_PeerIdentity *door)
Connects a tunnel to a hosting peer of a room through a so called door which is represented by a peer...
struct GNUNET_MQ_Envelope * pack_srv_room_message(const struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_MESSENGER_SrvHandle *handle, struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash, enum GNUNET_MESSENGER_PackMode mode)
Packs a message depending on the selected mode into a newly allocated envelope.
void forward_srv_room_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Forwards a message with a given hash to a specific tunnel inside of a room.
enum GNUNET_GenericReturnValue send_srv_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.
struct GNUNET_MESSENGER_OperationStore * get_srv_room_operation_store(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the used operation store of a given room.
struct GNUNET_CADET_Handle * get_srv_room_cadet(struct GNUNET_MESSENGER_SrvRoom *room)
Returns the CADET handle from a rooms service.
const struct GNUNET_HashCode * get_srv_room_key(const struct GNUNET_MESSENGER_SrvRoom *room)
Returns the shared secret you need to access a room.
void forward_tunnel_message(struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
Forwards a given message with a known hash through a tunnel.
enum GNUNET_GenericReturnValue update_tunnel_messenger_version(struct GNUNET_MESSENGER_SrvTunnel *tunnel, uint32_t version)
Updates the messenger version of the tunnel to a given version if it is compatible to the running pee...
enum GNUNET_GenericReturnValue update_room_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
void send_tunnel_envelope(struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_MQ_Envelope *env, const struct GNUNET_HashCode *hash)
Sends an envelope containing a message with a given hash through a tunnel.
const struct GNUNET_HashCode * get_tunnel_peer_message(const struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Returns the hash of the latest peer message published through a given tunnel and matching the tunnels...
enum GNUNET_GenericReturnValue is_tunnel_connected(const struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Returns the status of a currently bound channel of a tunnel.
void handle_tunnel_message(void *cls, const struct GNUNET_MessageHeader *header)
Callback for message handling via header in a tunnel that is provided as a closure from a CADET chann...
static void callback_tunnel_sent(void *cls)
void destroy_tunnel(struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Destroys a tunnel and frees its memory fully.
void bind_tunnel(struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_CADET_Channel *channel)
Binds a CADET channel to a tunnel and replaces its channel the tunnel is currently bound to if necess...
uint32_t get_tunnel_messenger_version(const struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Returns the current messenger version the peer connected via a given tunnel has reported to be using ...
enum GNUNET_GenericReturnValue check_tunnel_message(void *cls, const struct GNUNET_MessageHeader *header)
Callback for message verification via header in a tunnel that is provided as a closure from a CADET c...
void get_tunnel_peer_identity(const struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_PeerIdentity *peer)
Writes the peer identity of the peer connected via tunnel to this peer into the peer parameter.
void callback_room_handle_message(struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
void callback_tunnel_disconnect(void *cls, const struct GNUNET_CADET_Channel *channel)
Callback for a CADET channel disconnecting to manage this event as a proper tunnel provided as its cl...
struct GNUNET_MESSENGER_SrvTunnel * create_tunnel(struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_PeerIdentity *door)
Creates and allocates a tunnel of a room to a specific peer identity (called door).
void disconnect_tunnel(struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Disconnects and unbinds a channel from a tunnel.
static enum GNUNET_GenericReturnValue verify_tunnel_message(struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash)
enum GNUNET_GenericReturnValue connect_tunnel(struct GNUNET_MESSENGER_SrvTunnel *tunnel)
Tries to connect a tunnel by creating a new CADET channel and binding it.
static void update_tunnel_last_message(struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_HashCode *hash)
enum GNUNET_GenericReturnValue send_tunnel_message(struct GNUNET_MESSENGER_SrvTunnel *tunnel, void *handle, struct GNUNET_MESSENGER_Message *message)
Sends a message by packing it automatically into an envelope and passing it through the tunnel.
static struct GNUNET_VPN_Handle * handle
Handle to vpn service.
Definition: gnunet-vpn.c:35
void GNUNET_CADET_receive_done(struct GNUNET_CADET_Channel *channel)
Indicate readiness to receive the next message on a channel.
Definition: cadet_api.c:872
void GNUNET_CADET_channel_destroy(struct GNUNET_CADET_Channel *channel)
Destroy an existing channel.
Definition: cadet_api.c:830
struct GNUNET_MQ_Handle * GNUNET_CADET_get_mq(const struct GNUNET_CADET_Channel *channel)
Obtain the message queue for a connected channel.
Definition: cadet_api.c:1066
struct GNUNET_CADET_Channel * GNUNET_CADET_channel_create(struct GNUNET_CADET_Handle *h, void *channel_cls, const struct GNUNET_PeerIdentity *destination, const struct GNUNET_HashCode *port, GNUNET_CADET_WindowSizeEventHandler window_changes, GNUNET_CADET_DisconnectEventHandler disconnects, const struct GNUNET_MQ_MessageHandler *handlers)
Create a new channel towards a remote peer.
Definition: cadet_api.c:1015
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multipeermap_contains(const struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key)
Check if the map contains any value under the given key (including values that are NULL).
unsigned int GNUNET_CONTAINER_multipeermap_size(const struct GNUNET_CONTAINER_MultiPeerMap *map)
Get the number of key-value pairs in the map.
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multipeermap_remove(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, const void *value)
Remove the given key-value pair from the map.
#define GNUNET_log(kind,...)
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
GNUNET_GenericReturnValue
Named constants for return values.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format.
@ GNUNET_OK
@ GNUNET_YES
@ GNUNET_NO
@ GNUNET_SYSERR
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
@ GNUNET_ERROR_TYPE_WARNING
@ GNUNET_ERROR_TYPE_ERROR
@ GNUNET_ERROR_TYPE_DEBUG
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_free(ptr)
Wrapper around free.
const char * GNUNET_MESSENGER_name_of_kind(enum GNUNET_MESSENGER_MessageKind kind)
Get the name of a message kind.
Definition: messenger_api.c:44
#define GNUNET_MESSENGER_VERSION
Version number of GNUnet Messenger API.
@ GNUNET_MESSENGER_KIND_INFO
The info kind.
@ GNUNET_MESSENGER_KIND_MISS
The miss kind.
@ GNUNET_MESSENGER_KIND_REQUEST
The request kind.
@ GNUNET_MESSENGER_KIND_PEER
The peer kind.
@ GNUNET_MESSENGER_KIND_UNKNOWN
The unknown kind.
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:305
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
void GNUNET_MQ_notify_sent(struct GNUNET_MQ_Envelope *ev, GNUNET_SCHEDULER_TaskCallback cb, void *cb_cls)
Call a callback once the envelope has been sent, that is, sending it can not be canceled anymore.
Definition: mq.c:655
void GNUNET_PEER_change_rc(GNUNET_PEER_Id id, int delta)
Change the reference counter of an interned PID.
Definition: peer.c:192
const struct GNUNET_PeerIdentity * GNUNET_PEER_resolve2(GNUNET_PEER_Id id)
Convert an interned PID to a normal peer identity.
Definition: peer.c:234
void GNUNET_PEER_resolve(GNUNET_PEER_Id id, struct GNUNET_PeerIdentity *pid)
Convert an interned PID to a normal peer identity.
Definition: peer.c:220
GNUNET_PEER_Id GNUNET_PEER_intern(const struct GNUNET_PeerIdentity *pid)
Intern an peer identity.
Definition: peer.c:108
#define GNUNET_MESSAGE_TYPE_CADET_CLI
Traffic (net-cat style) used by the Command Line Interface.
struct GNUNET_TIME_Relative GNUNET_TIME_relative_get_zero_(void)
Return relative time of 0ms.
Definition: time.c:133
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:739
struct GNUNET_TIME_Relative GNUNET_TIME_absolute_get_difference(struct GNUNET_TIME_Absolute start, struct GNUNET_TIME_Absolute end)
Compute the time difference between the given start and end times.
Definition: time.c:423
struct GNUNET_MESSENGER_ListTunnel * find_list_tunnels_alternate(struct GNUNET_MESSENGER_ListTunnels *tunnels, const struct GNUNET_PeerIdentity *peer)
Searches linearly through the list of tunnels peer identities for matching against a specific peer id...
enum GNUNET_GenericReturnValue contains_list_tunnels(struct GNUNET_MESSENGER_ListTunnels *tunnels, const struct GNUNET_PeerIdentity *peer)
Tests linearly if the list of tunnels peer identities contains a specific peer identity and returns G...
struct GNUNET_MESSENGER_Message * copy_message(const struct GNUNET_MESSENGER_Message *message)
Creates and allocates a copy of a given message.
void hash_message(const struct GNUNET_MESSENGER_Message *message, uint16_t length, const char *buffer, struct GNUNET_HashCode *hash)
Calculates a hash of a given buffer with a length in bytes from a message.
struct GNUNET_MQ_Envelope * pack_message(struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash, const GNUNET_MESSENGER_SignFunction sign, enum GNUNET_MESSENGER_PackMode mode, const void *cls)
Encodes the message to pack it into a newly allocated envelope if mode is equal to GNUNET_MESSENGER_P...
void destroy_message(struct GNUNET_MESSENGER_Message *message)
Destroys a message and frees its memory fully.
uint16_t get_message_kind_size(enum GNUNET_MESSENGER_MessageKind kind, enum GNUNET_GenericReturnValue include_header)
Returns the minimal size in bytes to encode a message of a specific kind.
enum GNUNET_GenericReturnValue decode_message(struct GNUNET_MESSENGER_Message *message, uint16_t length, const char *buffer, enum GNUNET_GenericReturnValue include_header, uint16_t *padding)
Decodes a message from a given buffer of a maximal length in bytes.
void cleanup_message(struct GNUNET_MESSENGER_Message *message)
Frees the messages body memory.
@ GNUNET_MESSENGER_PACK_MODE_ENVELOPE
void convert_messenger_key_to_port(const struct GNUNET_HashCode *key, struct GNUNET_HashCode *port)
Converts a Messenger service key of a room to the specific port which gets used for the CADET channel...
void delayed_disconnect_channel(struct GNUNET_CADET_Channel *channel)
Starts an urgent task to close a CADET channel asynchronously.
Opaque handle to a channel.
Definition: cadet.h:116
Opaque handle to the service.
Definition: cadet_api.c:39
A 512-bit hashcode.
struct GNUNET_HashCode previous
The hash of the previous message from the senders perspective.
enum GNUNET_MESSENGER_MessageKind kind
The kind of the message.
struct GNUNET_TIME_AbsoluteNBO timestamp
The timestamp of the message.
struct GNUNET_MESSENGER_SrvTunnel * tunnel
struct GNUNET_MESSENGER_MessageHeader header
Header.
enum GNUNET_GenericReturnValue auto_connecting
struct GNUNET_CONTAINER_MultiPeerMap * tunnels
struct GNUNET_MESSENGER_Service * service
struct GNUNET_MESSENGER_ListTunnels basement
struct GNUNET_MESSENGER_SrvHandle * host
struct GNUNET_CADET_Channel * channel
struct GNUNET_MESSENGER_MessageState state
struct GNUNET_MESSENGER_SrvRoom * room
Handle to a message queue.
Definition: mq.c:87
Message handler for a specific message type.
Header for all communications.
The identity of the host (wraps the signing key of the peer).
Time for absolute times used by GNUnet, in microseconds.